Building foam core wings

RCU Rules & FAQs. The 1″ drill uses the oak Dec 14, 2014 · Scratch Building, Aircraft Design, 3D/CAD - Decision time: Foam core or traditional balsa rib wing? - I want to build a 84 model of a Buster Stunter , a racing plane designed and built by Steve Wittman in the late 40s. The machine uses servos paired with high resolution encoders to give accurate and repeatable results. Apr 11, 2021 · Take a straight wing and cut through it at a 10 degree angle. Mar 26, 2023 · How To Make a Foam Core Wing! MBMrc. The outline along the 10 degree plane is elongated because of the truncated cut. Does anyone do the same, or can anyone provide decent textbook type resources where we could read and learn more about wing structures? Also, when using this type of core is it common to run sparless/do you run any other internal structures besides Apr 5, 2021 · Registered User. Four axis hot wire CNC cutting. Wings are cut for 1/4" balsa wing tips. This highly accurate machine can be used to cut anything that a hot wire can pass through safely. Is this ok for a 3D areobat? Do you sheet the wing then cut the holes and leave open bays or do you cut the holes in the core then fully sheet it? Jan 20, 2022 · Hands off foam wing core cutter build: kenh3497: The Builders Workshop: 27: Jan 25, 2018 08:44 AM: Build Log: Genoma Foam Core Build: Jean Dorais: Electric Competition Soaring-F5J, eF3K, F5K, ALES: 66: Sep 05, 2017 07:04 PM: Discussion: Foam core building advice for a balsa scratch builder: Jonnybgood3: Foamies (Scratchbuilt) 8: Aug 22, 2017 09 Jun 5, 2015 · I have used resin and 3m77 spray methods but there was another earlier method that worked really well - paint the core with 50/50 mix water and white wood glue and let dry. For most wings, white expanded bead foam (like cheap foam coolers) is plenty strong. The model is designed around a 180 Saito (30cc for people like me from the metric world) and a ws of. The kit came with the foam wings presheeted and a 1/4" wide slot cut into the foam to form a cavity to receive the spars (which were part of the formers). built-up - I'm building a wing from plans that were drawn for a balsa built-up wing. Cut two 1/8" lite ply pieces to fit in the slots and glue them in with the wing straight. Lorem ipsm dolor amet, consec tetur adipis cing elit, sed do eiusmod tempor incid idunt ut labore et dolore magna aliqua. There are several commercial devices made for cutting foam wing cores and other parts. Apr 13, 2012 · a tighter cutting wire should make better cuts the bow handle is 1 1/2"X3/4"X42" E TO E 20 degree miter cut on both ends with the 5/16" holes drilled at 20 degrees 1 1/4" deep 3/4" from ends and centered. Foam is a lighter material than balsa. . In this classic how-to, Dave Garwood details how to creae strong, straight panels on foam-core wings. Sport models having fully sheeted wings most commonly have a foam core which are exponentially easier to build. Learn More About Us Contact Us Sep 12, 2017 · You can find a complete list of the parts I used at the end of the article, but I wanted to share the plans and build process for the foamboard spec wing. Jul 11, 2017 · Then, remove the crumbled foam, and fill 1/2 - 3/4 of the way with spray expanding foam. You should have: - 2 wing (right and left) - 3 nose reinforcements (small triangle) - 8 spars (long strips) - 1 power pod mount (not included Feb 21, 2023 · Discussion Krill 330sc foam core wings build Build Threads Oct 19, 2009 · I developed the method of installing 1/8 inch thick landing gear "clips" or ribs that but up against a full-depth spar at the rear and sit flush with the surface of the core, allowing the wing sheeting to contact them and impart strength to the entire assembly. Styrofoam is stronger in compression than expanded bead foam and tolerates vacuum bagging to harder vacuums. For sailplanes, real brand name Styrofoam is better/necessary. Cut a slot in the cover for the servo arm and full Apr 26, 2010 · Kit Building - Foam core wings - I build alot , but have always avoided foam core kits, more out if ignorance , than anything else. I also think a foam wing can stand up to a little more landing/hangar rash than a builtup wing. Hey everyone, I've been trying to think of alternate methods of building wings, as that seems to be the part of the build that takes people the most time and money. Step 1: Gather Materials It requires quite a few different materials to build a composite wing, though the end product is only composed of: the foam wing core, kevlar, fiberglass, and carbon fiber. With a Dremel router, rout a pocket in the wing about 1/8” larger than the servo with the depth set at the servo thickness plus 1/32” to 1/16”. Scratch Building your Own RC Planes Episode #4 - Part One "Cutting Foam Wing Cores". You can stand on a foam wing. 3M 30-NF is a water based version of Super 77 and will not dissolve the foam like the 77 will. His photo-illustrated, step-by-step instructions will ensure you get such great-looking and strong results that you may never go back to stick-built construction! To read this how-to, join MODEL AIRPLANE NEWS PREMIUM! Foam is stronger, costs less, takes less time to build and repair, and is more precise, too. Glue tips to the wing with thin CA. There are simply fewer parts, compared to similar-sized classic airframes. Re joining the wings (though done already) from my experience, just 3m77 spray adhesive, sprayed liberally on both roots, let dry a short bit, then CAREFULLY joined together, provides and instant bond. All you need is foam board, available from Dollar Tree May 10, 2022 · How to Build an Airfoil Wing for RC Aircraft (Experimental Airlines Style) Easy Foamboard Wing (HD) Nov 10, 2017 · Here I am showing how to make rc airplane wing using Foam sheet and tape. Nov 14, 2023 · Design the model airplane – Draw a plan on paper or use software such as CAD to design the model airplane. My understanding , is you use a foam cutter to cut a blank , add spars, LE,TE and sheet the Apr 20, 2015 · Put the wood down on the bottom shuck, then wing core, then top shuck then a piece of 3/4" plywood cut to the planform of the wing then six or eight cinder blocks for weight. Dec 19, 2020 · Although the focus is on Foam Core and LitePly construction, since many of the techniques used in other build styles are shared, input from other build disciplines is welcome if appropriate. Cut the mounting ears from the servo and clean with alcohol. Last edited: Jan 10, 2017. What glue to use to bond balsa to foam core wings. com; Send Us a Message. This wing has a nice airfoil shape. 5/17/2007, Important note! Please be sure to read the comments that other users have left below. This is how we constructed a drill to drill perfectly aligned holes deep into a foam wing core. Cuts styrofoam for surfboards, model plane wings, sculpture, model train or tabletop wargame terrain, 3D sign letters, mold models for lost foam casting, etc. I have an old Filtecraft ARF which has a thin, yet tough skin on the wing which Hotwire foam core delta wings: Erik v. Oct 9, 2008 · Kit Building - Sig King Kobra Foam Wings & Retracts Question - Hi all, I'm beginning a Sig King Kobra & will be installing Spring Air 202 HD retracts. The guide blocks are oak, but any hardwood should work. Cutting Foam. I glue a hardwood brace to resist pulling through the wing. The wings are foam cores, and I used poly-urethane glue, and I also reinforced the 3m77. "C" dimension is foam only. A tach cloth works well. but Access curriculum solutions for special education and inclusive classrooms to achieve literacy outcomes, student engagement and world knowledge - Building Wings RC flying wings, planks, or delta wings are unique types of aircraft that are quite easy to build compared to classic airframes. Jun 14, 2006 · Scratch Building, Aircraft Design, 3D/CAD - Foam Core Wings to Traditional Balsa Ribs - [sm=cool. Wing mounting, Bulkheads, landing gear mounting, and firewalls are just some of the topics. 00 The spinner backplate is $225. Then bond the entire internal structure into the auction side of the wing, including the end caps. again due to the dimensional size of the box. I use a delrin bellcrank with a piano wire axle poking up through the wing top and bottom. 1) Go ahead and cut out the damaged cf leading edge and most of the smooched foam. Your email. Hang up to dry. It has a compression strength of 1,000 pounds per square foot. I found that veneer and foam was now so expensive that it would be cheaper/better/easier to build a built up balsa wing! Bill Kits cut foam wings and the website gives an indication of the price - this also made me think that even Feb 12, 2007 · RE: How to repair foam core wing. Polystyrene foam is often used to construct boat docks. We use two female molds to create the surface of the wing. Something other than the traditional balsa, obichi ply, or low temp iron on covering. Then he sprayed a generous coat on each surface, waited a few minutes, then pressed them together. Apr 21, 2013 · The air between the ribs in a built up wing are lighter than foam. Slide and glue piece 1 into place. Lorem ipsm dolor amet, consec tetur adipis cing elit, sed do eiusmod tempor incid idunt ut labore Glue in the corners, 1,4 sq. May 12, 2007 · In general foam core vs built up are very close in weight when the foam core wing is properly built. Aug 21, 2006 · Scratch Building, Aircraft Design, 3D/CAD - Alternate foam core wing skin material? - Hi all, I'm looking for an alternative foam core wing skin material. The single most important factor in building these wings straight is to have a perfectly FLAT building board. Dec 22, 2010 · Cut down to the top sheeting but not through it. DIY gliding offers advantages such as customization, cost-effectiveness, learning opportunities, and a sense of community. With the correct process I can build a foam wing lighter and stronger then built up. Coat the cores, apply the paper & coat the paper again. I cover everything from foam cores lay u Jul 24, 2006 · Support Structures. A couple pics of a pylon wing with retracts. I decided to do plug in wings which meant installing an aluminum spar. I am indeed speaking of 3M Super 77, which is a spray contact adhesive and has been used for sheeting foam cores by some folks for years with good success. I'm going to cut a foam core and sheet it. Thin PVA with water. Things to keep in mind: The airfoil is created by folding the skin around the airfoil ribs we cut, so make sure to cut enough material to make it all the way around the airfoil rib. We encourage plenty of photographs and video to help make a point, ask a question or relay a build technique. To come up with our list of easiest foam planes to build from scratch Step 4: Making the Elevator. Moreover, there is a bunch of RC Flying Wing Plans available online that one can use for building an RC glider from scratch. Make sure whatever glue you use does not melt foam (Goop, regular CA). All the bonding is done with a 3M two part epoxy adhesive. But too much glue and/or heavy wood can quickly cause the Foam core wing to gain alot of unwanted weight. Mar 10, 2003 · Sheeting Foam Wings. Polystyrene foam is the type used in several popular composite airplanes in the wings and control surfaces. Jan 28, 2003 · Kit Building - Lightening foam core wings? - I've read some builders cut holes in the foam behind the spar, leaving ribs in the foam. Glue together - thick CA works well here. I hooked up the bow, pulled out a scrap of foam (white foam) and began to bump up the power. I then put some tiny wood screw eyes in the dowels to attach the wire to. The following procedure is a successful way for the builder to install perfect wing spars. Aug 21, 2021 · Installing spars in foam wing cores: Full length spars are easy to install and they will greatly increase the strength of your wing core. Is this ok for a 3D areobat? Do you sheet the wing then cut the holes and leave open bays or do you cut the holes in the core then fully sheet it? Nov 14, 2023 · The basic steps of building an RC Flying Wing: Design your RC Flying Wing using a free computer-aided design (CAD) program, such as Fusion 360. I can tell you UPS charges us a $68 oversized fee on our wing box (that is not including the charges they get when shipping). My concern Jan 18, 2010 · Here is a technique I used when building the Yellow Aircraft F-18 (single) that was very simple. Trailing edge is cut for 1/4" Balsa, and 1" tapered balsa ailerons. It is blue in color and is supplied in large billets. You can also do thin art card & epoxy/ glass. Tack glue the wing tip to the wing using the center lines as guides and shape. Ut enim ad minim veniam, quis nostrud exer citation ullamco la enim lorem isae ni. EPS Styrofoam, by its nature, is made up of a strong honeycomb like structure. I have seen some video on making foam core wings for R/C but none for control line airplane and wondering how this is done Dec 12, 2011 · I like foam-core for the ease if you just have simple flaps and ailerons, but if you have many systems, sometimes a built-up wing is easier. "D" dimension figured with 1/16" thick sheeting applied. 2) Fill the void. The bars are 5/16"X13"galvanized round stock with shrink wrap covering for safety. Cut the spacers just thicker than the Liteply former blank. Nov 25, 2012 · Guppy foam core wings covered with paper build video. Views: 306. As my building skills have progressed, a lot of the kits I,m looking at have foam core wings. The Mini Vortex wings are cut the same way from a 2-1/2″ x 7-5/8″ x 16″ 1# density foam block. Both birds have turned out too heavy and I wonder if it's the epoxy. Glue a spacer strip along the bottom edge of the backplate but touching the bottom edge of the plywood former. Cut out the wings and other components using a hot wire cutter or retractable knife. Gliders have a long history, with the concept of building them at home beginning in the early 20th century. Video build series here. Wanted foam core wings Aircraft - General - Miscellaneous (FS/W) Oct 16, 2002 · Scratch Building, Aircraft Design, 3D/CAD - Foam core wing vs. com FAQ; Radios, Batteries, Clubhouse and more Cheap ($30+-) and easy to build hot wire foam cutter made from commonly available parts. First, cut out all the parts for the spec wing. i have a patern plane and i would like to know how to install retracts in the wings. For powered planes that typically have thick wings, the strength of Jan 20, 2022 · I heard he was showing a guy how to build foam wings, so I tagged along to learn the secret. 00, that is what I get charged by my local machine shop when he makes it. The basic process is to produce templates first, (usually a "root" and "tip" template) then use the electrically-heated hot wire to cut the basic wing shape out of the foam. Jan 10, 2017 · Even if you were to have someone cut them the shipping charge on a 35% or 40% wing is pretty high. Both sides at the same time. Glue in the corners, 1,4 sq. Jul 21, 2014 · anyone build a foam core wing for a control line airplane? How do you go about mounting the bellcrank and cut out the leadouts. Apr 5, 2009 · Scratch Building, Aircraft Design, 3D/CAD - Foam Core to Built-up Wing - Guys I am thinking about scratch building a plane over the winter months. The plans call for a foam core wing and tail feathers. Jul 18, 2013 · The spackle is just to replace the lost foam and restore the airfoil shape. 664. Be generous with your overlap. Ok, here are lessons learned, on my 1st wing. the wings are sheeted and it does have the channels cut to run wing servos and retract wiring. Four axis CNC milling. Mount the servo on the inside of the cover on 1/4 in. Next day you have a covered foam wing. This time I was thinking to make the wing using lightweight (white )foam core sheeted with 1. Also an arrow pointing to the front of the block is drawn on each end. Than cover with some oracover or smilar. Side strips of oak are then glued onto the MDF along the sides of the plywood former. Subscribed. You do not want it to use it for leading edges. The end of each video will link with the next in order: Easy Foamboard Wing Airfoil: the Basic Version (8 min 1 sec) the Armin Wing: part 1 - TAPE COVERING FOAMBOARD (6 min 1 sec) the Armin Wing: part 2 - Cutting, Beveling, Bending the Airfoil (5 min 59 sec) the Armin Wing: part 3 - Forming and Gluing the Wing (5 min 54 Making Foam Wing Cores is relatively easy, using styrofoam. The spacers should be about 1″ wide. but Sep 19, 2001 · 1. The retracts and wheels are quite large, my question is, should I cut out the wheel wells and sheet afterwards or should I sheet first and open up the wells later? . Its very useful when you don't have foamboard an Aug 14, 2017 · Insulation foam covered in fiberglass is very popular with many home built aircraft. All wings are cut off for 1/4" LE Balsa. 3) Restore the airfoil. CNC Foam Cutting. I recently had the idea of hot wiring foam into the airfoil shape and covering it in fiberglass. This is a How to Vacuum Bag Foam Wing Cores video. Sounds funny but it's true. They are activated by moisture in the air, but will cure quicker with more expansion if the area is misted with water and cured in 70 + degrees farenhiet. I just pass along that cost to the modeler, and that is part of the $875 cost. Some people will claim that they can build a foam core wing that weighs How to build / fabricate / fab / make an adjustable rear wing for a Formula 1000 race car with a foam core cut on a homemade hot wire foam cutter, laminated BushGnat Build. The finished 520 sq in wing with retract mounts ready for glassing and painting weighs 15 oz. The process for building the stabilizers is almost exactly the same as building a wing, except its smaller and uses a symmetrical airfoil shape. Subject. Careful, because it is hard to reposition once stuck. Jul 23, 2002 · It worked! I insulated the cutting wire from my aluminum bow by inserting dowels into the ends of the cutting legs of my bow (1/2" aluminum tubing). Ejoy!If you have any questions, feel free to send me a message. Allow to cure overnight. Old school brown paper & white glue works well on foam & costs almost nothing. The base is a 3/4″ x 24″ x 48″ piece of common MDF with a 2″x 4″ frame attached to keep it flat. Instead of angle cutting the elevator (#2), cut the stationary piece labeled #1 in the photo at the 30-45 degree angle just as in step 3. 5mm ( 1/16 ) balsa. Break tips off and hollow out. Sig recommends the construction of a Dec 20, 2020 · This is how we constructed a drill to drill almost perfectly aligned holes deep into a foam wing core. Jan 9, 2017 · Then you have to order your wing and tail cores from Coby for another $200. See photo for locations. The other thing is you probably want to verify the density of the foam as well. Oct 17, 2016 · Too many times, people are trying to make the "lightest" wings possible, and skimp on the most important, which is the glue. This step is essential since it will help you to cut and assemble the foam material correctly. Be sure the part will slide in and out but fit Jun 26, 2022 · Originally Posted by mawz. 4) Restore the leading edge with new cf tow. Line it up perfect and tape it to the bottom core with masking tape. Fiberglass & foam wings. to go in and sit on the corner posts. The sag of the covering between the ribs changes the airfoil slightly where a foam core wing the airfoil doesn't change. Then iron on the wood with an iron set to full steam. Schaik: The Builders Workshop: 19: Nov 16, 2009 07:51 AM: Help! Who cuts custom foam core wings reasonably pricedfirst scratch build attempt: planebldr: Fuel Plane Talk: 1: Oct 30, 2009 08:08 PM: Discussion: Wings skins using foam core beds? Upvector: Composites Fabrication: 10: Oct 19, 2009 01:29 AM Feb 7, 2011 · Kit Building - how to add retracts to a foam core wing? - how to add retracts to a foam core wing? ita a arc model. The top core is left aside for now, so that you can apply the balsa skin to the top of the wing panel. Then bond the pressure side of the wing onto that. The basswood is cut to be a guide for later hollowing the completed tip - see photo. RCU RULES OF POSTING; RCUniverse. Then sand it slightly below the surface of the intact foam. dont say it i know. The sheet attachment methods vary with contact cement or very thin layer epoxy being the traditional methods. The steam goes through the wood to soften the glue enough to give an instant bond. The wings have actuating pins that go through "smile" cuts in the sides of the fuse that ride in slots in the cams. That's all sweep does; it makes the air think the airfoil is longer for the same thickness. Build a Foam Wing in 10 Minutes!Follow along as I demonstrate how to build a foam wing in 10 minutes. I already glued the retract mounts. A short description of your service. Wing cores, wing molds, spar cores, spar sleeve molds, and much more. This is my first foam core wing so I'm looking for advice from those with more experience regarding the retract installation. The main drawback of a foam core wing is weight. Pine will work if the guide tube bushing is also used. The cut out/splooge/hinge method is pretty much standard across a wide range of planes (Jart, Aeromod, Higgins, etc). It was pretty simple. I make the airfoil templates by gluing a printed paper template to a thin wooden board May 1, 1999 · Polystyrene foam is the first. On foam-core wings you may want to add sub-ribs to create hard points for different systems. The 1″ drill uses the Jan 30, 2003 · Kit Building - Lightening foam core wings? - I've read some builders cut holes in the foam behind the spar, leaving ribs in the foam. 7K subscribers. I do not use any wooden spars. NO QUESTION IS A STUPID QUESTION so ask away. 31K views 1 year ago. Print out several copies of the plans and glue them onto foam board or Depron foam. That is the airfoil profile to the airplane, because that is the profile that is aligned with the airflow. Trace the shape of the wing skin on the sheet of foam board. Nov 14, 2020 · Scratch Building, Aircraft Design, 3D/CAD - Foam core blasa sheeting 43" sport wing - does it works - Hi, I'm scratch building balsa planes sometimes. The Long-Ez and variants, the KR-2, Quickie, Velocity, and many more. A properly designed and well built balsa wing will always weigh less than an otherwise identical foam core wing. If you insist on using Contact Cement, try this: After applying contact cement on both the core and the sheeting, and letting it set for 10-20 min, while the core sits in the cradle, cover the core with wax paper (plain paper also works) leaving 1/2" to 1" exposed at the leading edge. Your message (optional) Sport models having fully sheeted wings most commonly have a foam core which are exponentially easier to build. There is also some info specifically for glow models, as well as instructions for cowl construction. Step by step instructions from Marty on how to do a foam core wing! more. Now lay up the wing tips using a 1/16” bass wood core. Oct 17, 2021 · If you find a source of white foam check before you buy that veneer is available at a reasonable price too. This chapter explores the many methods of providing additional support and strength to your foam model. I'd put two tubes of aluminum in the mix for spars. Epoxy a 1/32” ply sheet to the bottom of the routed pocket. this is a 40% yak, that is a plywood/balsa fuselage, that uses formers and spruce stringers. Jun 28, 2004 · Register; Forums. He laid out newspaper, then put the balsa skin and the foam core on top of the paper. This type of foam can be easily shaped using a "hot-wire" technique described later in this article. Feb 16, 2017 · Tips & Techniques - Need advice on large scale foam core wing - I am building a foam core wing for a 95 warbird. 4. Your name. Has been done a thousand times in the old days. how to add retracts to a foam core wing? ita a arc model. Covering Foam Core Wing: billrcpilot: The Builders Workshop: 6: Mar 01, 2004 07:09 AM: Yippee! Advice needed on building a foam core wing: Balsabuster: The Builders Workshop: 1: Oct 23, 2003 09:14 PM: Any way to get a warp out of a balsa sheeted foam core wing? KOMET 44: Electric Plane Talk: 4: Dec 01, 2002 11:27 AM: Hot-wiring Foam Fuselages Apr 18, 2004 · Scratch Building, Aircraft Design, 3D/CAD - Foam core wing - I have heard allot about foam core wing, and was wondering how do make these type of wings? Generic Foam Wing Cores. My foam wings are built from 1 lbs foam and triple cored, sheeted with 1/16th balsa and balsa leading and trailing edges. Wings are cut in two panels, must be sanded for required dihedral. Make an aircraft plywood cover the same thickness of the foam, 1/16 or 3/32. The rear third of the airfoil rib has been removed so the rcfoamcorewings@gmail. gif]I would like to build the T-34 Mentor from the RCM plans by Mark Frankel, but from what I read in their add the plane is designed with foam core wings. First the ends of the block are marked with a V to indicate up on the block. Apr 16, 2018 · Looking for suggestions on repairing foam core balsa sheeted wings: fly2bob: Sailplane Talk: 0: Jul 11, 2017 05:53 AM: Help! Looking for suggestions on repairing foam core balsa sheeted wings: fly2bob: Slope Soaring: 0: Jul 11, 2017 05:50 AM: Discussion: What type of glue to use when glueing balsa sheeting to foam core wing: jumpinjo: Fuel Registered User. Step 7: Draw the Shape of Your Wing Skin. 3. Cut out the slots to fit the elevator in the airframe. or thicker plywood rails. Mar 26, 2022 · Slow builder. Cut a slot in the cover for the servo arm and full Mar 3, 2016 · Featured News. My preference would be to use polyurethane glue (Gorilla glue), but epoxy or other glues will work. 2. Cut the foam material – Use a sharp blade or cutter to cut the foam material according to the model airplane design. Lay the foam wing panel down in the bottom core. They are polyurethane glues, and I use them all the time. spruce or aircraft plywood the full depth of the hole, up to the foam. Our team is currently designing a first-gen aero kit, looking into using rohacell foam core, but don't have anyone experienced in the subject yet. Aug 30, 2006 · Now you need to prep your foam: Use a cloth to wipe off any dust. Then cut a 1/4" dia dowel sightly (1/32"-1/16") short of the measurement on the small dia dowel. Nothing against that, is just that I don't have the know how or May 2, 2017 · Be sure to have your pockets ready though, a quick search on eBay will show you model planes ranging from $20 to almost $300. Select a flat piece of hard balsa at least 7" long and the same width as the spar to be used. Some people will claim that they can build a foam core wing that weighs Jul 26, 2010 · Theres a small 1/8" rod ahead of the wingrod that the cams rotate on. Over here in the USA, it is called Gorrilla Glue, or Elmer's ultimate. Essential tools for building gliders at home include measuring and marking tools, cutting tools, and joinery tools. Dec 28, 2016 · Here is how I go about making wings for my scratch built RC Airplanes. In this video, I'm showing you Part 4 how to make a 1m #F3k DLG . I've built a couple sets of foam wings, using my homemade cutter, and have been using thinned epoxy to bond the balsa sheet to the foam. Years ago I build a Jim Ryan P-38 that turned out great, and I think I used contact Personally I prefer a foam wing as I have all the required foam cutting and vacuum bagging equipment. df tp gm gv tj sa qw vp xz lu