RE: Hot wireWire
I agree with Lone Star; I just bought some 20ga and 22ga from Jacob's. Prices are good, quick turn around and Gary was very helpful. BTW, the wire cuts better than anything I have used to date. Bill
Posted on: 8/16/2011 4:10 PM by Author "billk101" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10673522

RE: P-38 Wing Incidence
*Root chord 30" (max thickness 4.75") NACA 23016 *Tip Chord 9" (max thickness 1.2") NACA 4412 The airfoil profile is a smooth transition over the 156 inch wingspan from the NACA 23016 at the root to a NACA 4412 at the tip
Posted on: 10/11/2010 3:25 PM by Author "billk101" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10061967

P-38 Wing Incidence
I am building a 1/4 scale P-38 and am finalizing the design. I have started with 3-views which show about 4 1/3 degrees of positive incidence at the wing root. They also show 2 1/2 degrees of washout at the wing tip. Are these observations accurate? Are there any concerns on the flying characteristics using these measurements? This plane will have very scale lines based on the 3 views. Please excuse any misuse of terminology.
Posted on: 10/11/2010 1:40 PM by Author "billk101" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10061771

RE: 156
Just a quick update: Foam cores have been cut using my foam cutting table. It takes a little setup time due to the double taper. The table is designed to pull each end of the hotwire at a different rate so that the cuts are consistent and enter and exit the foam core simultaneously. My only job is to hold the bow as it is pulled through the foam. I my need to lighten the pivot portion of the table since in pulls a little harder than I would like but the overall all results are great. Just a light sand to remove the burrs and minor chatter marks. Left Center Section Left Outer Panel Right Center Section Right Out Panel
Posted on: 10/11/2010 10:12 AM by Author "billk101" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10061343

RE: 156
Steve, The dimension of the center section, outside left boom to outside right boom is 60 inches (this is the point where each 48 inch outer panel detaches). I want to mention again that this center section will be built as a single unit. The chord at the detach point is 22 inches long with max thickness of 3 3/8 inches and then double tapers to a tip chord of 9 inches with max thickness of 1 1/4 inches. Is this what you were asking? Avaiojet, The washout is to try to minimize tip stall effect at slower airspeeds. This design is scaled from 3-view drawings using TurboCad and I have incorporated the airfoils and and dimension of the full size P-38. The full size used NACA23016 at the root and NACA4412 at the tip. Using Profili software is created the templates used for foam cutting. This is not my first large scratch RC build; I have build a 1/4 scale P-51 (see attached picture) using traditional stick building methods. That said this is my first foray into large scale foam core building. I have closely followed Metalmorphous's thread, he is plating a Ziroli 1/5.3 scale P-38 with a 114" wingspan and it looks amazing. The plane I am building is a scratch built true 1/4 scale P-38 with 156" wingspan. I wish I could swing the Metalmorphous process but it won't be needed as I am modeling my plane after "Thought of Midnight" which is painted. I have also been playing with the overall design and build for 2 years. Here are some of the pictures of the overall design of the gondola Thanks, Bill
Posted on: 10/5/2010 11:59 AM by Author "billk101" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10048962

RE: 156
Charles, The measurements are in inches with following summary: Wing info: *Root chord 30" (max thickness 4.75") NACA 23016 *Middle Chord 22" (max thickness 3.38") *Tip Chord 9" (max thickness 1.2") NACA 4412 *Overall wingspan 156" *Outboard boom to boom 60" *Removeable wingtips 48" *2 1/2 degree washout *114 1/2 square inches aileron per side (229 square inches total aileron) *229 1/2 square inches of flap per side (459 square inches total flap area) *2932 1/2 square inches of bottom wing surface Booms are 101 1/2" long Gondola is 59" long Have you looked at the first post? The measurement are pretty legible.
Posted on: 10/4/2010 7:19 PM by Author "billk101" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10047501

RE: 156
Charles, Is there specific areas you are looking for more detail? General construction info is as follows: -foam core wings sheeted with G10 fiberglass sheeting -spars top and bottom (cf topcap benefits is the point of thread) -spar web tbd, there seems to be differnet opinions on the subject -gondola and booms will be fiberglassed bals/ply standard built up construction -outboard 4 feet of each wing will be removable for transportation (outboard flap and aileron only required non-permanent connections) -there will be a 2" primary wing joiner as well as a 1" secondary wing joiner (per drawing attached) -center section including: horizontal stab, vertical stabs, gondola, and booms will be single unit dertjack, Of course there would be an upper and lower spar since one is not good without the other. Thanks in advance for everyone's input I have also attached a possible spar config. This spar config would create a "pocket" that could be used as a joiner sleeve for the outboard wing thus removing the joiner tube mentioned above.
Posted on: 10/4/2010 2:42 PM by Author "billk101" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10046726

RE: 156
Steve, What do you think of the concept of wrapping 1/16" wall 1" by 1" aluminum square tube as opposed to using wood spar? From what I calculated the aluminum would be similar in overall weight to wood but would not have potential flaws or weak points that you have mentioned in a prior post. Thanks, Bill
Posted on: 9/30/2010 10:20 AM by Author "billk101" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10037738

RE: 156
Magne, I am not experienced in carbon fiber techniques but what you are saying makes sense to me. My understanding of this is that the under a vertical load the fiber on top would be resisting the force under compression and the fiber on the bottom would be resisting the force under tension (thus create a tubular structure). If a spar is not providing any real value why add the weight? I have also considered using an aluminum 1/16" walled 1" by 1" square tube as a spar with cf as a top cap. The weight is very similar to that of a wood spar but is much stiffer. I just thought of this: What if I wrapped the aluminum tube with CF thus creating a square cf tube? Any thoughts? Anyone? Bill The 0.10 g10 skin will certainly be stronger than a traditional fiberglassed balsa skin but the biggest reason is an almost paint ready surface when done.
Posted on: 9/30/2010 8:20 AM by Author "billk101" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10037530

RE: 156
Magne, I am not sure if shear web is required. Does anyone have thoughts regarding shear web vs the foam acting as shear? Bill Suggestions and experienced input is always welcome.
Posted on: 9/29/2010 8:06 AM by Author "billk101" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10035019

156" Foam Wing Carbon Fiber Question
I am back building a 1/4 scale P-38 (156" wingspan 30" root cord) My tendency is to over engineer on the safe side so I am wondering if my proposed use of carbon fiber makes sense? step 1 cut foam core for 3 piece wing step 2 install 1" by 1" hardwood spar (spar will taper top 1/2" thickness on outer wingtip) step 3 apply 3.7 oz unidirectional carbon fiber directly to foam core mirroring postion of cf on top and bottom (see attached cf layout diagram, picture 2) step 4 sheet entire wing (except last 6" to 8" of wingtip) with 0.010 G10 fiberglass sheet These are only the high level steps. I would appreciate any constructive feedback. Regards, Bill UniWeb Info: [link=http://www.acp-composites.com/home.php?cat=251]ACP Composite Product Info[/link] UniWeb is a new and easy to apply type of reinforcement. It consists of a nonwoven sheet of unidirectional carbon fibers that are held in position by a fine spider web of polymer fibrils Iying on the surface. The special polymer used is compatible with epoxy and polyester resins. The fibril or web system that bonds the reinforcement fibers together allows the fabric to be cut easily, trimmed, or slit, giving clean edges with absolutely no fraying. The fibers lie flat and straight, and cannot shift or bunch up as often happens with uni-stitched fabrics. Carbon Fiber UniWeb weighs 3.7 Oz. / Sq. Yd. and is .006" thick.
Posted on: 9/27/2010 3:54 PM by Author "billk101" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10031171

RE: Knowledge Quiz for Warbird wiz
introduced comfort-enhancing cabin features that set the industry standard. Innovations included folding armrests, opaque plastic window shades, and cantilevered seats supported by just two sets of legs for easier access and underseat stowage of carry-on articles.
Posted on: 7/13/2010 1:22 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9862409

RE: HUGHES XF-11
Have you tried www.bobsairdoc.com Bill
Posted on: 6/30/2010 5:50 PM by Author "billk101" in the forum "Twin & Multi Engine RC Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=9836972

RE: COWL
Here is the link: [link=http://www.spychallaaircraft.com/]Spychalla Aircraft LLC[/link] His work looks great. Bill
Posted on: 3/16/2010 6:22 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9587689

RE: 1/4 scale P 51 Mustang
Thanks, it flys very scale with long take-offs but once it is up on step it flies great. It is definitely not capable of anything approaching 3D, which is exactly what I wanted. It does loops, rolls, split-s, ... but you have to be concious of your energy potential. Bill
Posted on: 1/25/2010 2:26 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9446828

RE: 1/4 scale P 51 Mustang
1/4 scale is definitely possible, but I agree with the prior post that time, planning, research, and money (oh, did I say money) are critical. I scratch built a 1/4 scale P-51D in 2005 with the following specs: -modelled after, and signed by, Capt. Donald S. Bryan's Little One III (13.33 kills, five of which he shot down in one day, two FW-190s, an ME-110, and one AR-234 jet bomber) -116" wingspan -96" length -54 lbs. -95cc First Place Engine -28X10 prop -Funtional exhaust -Fully detailed cockpit first flown 9/25/2005 Sequenced gear doors, weathering, 13 kill markings, and data plate added after maiden flight. If you decide to move forward make sure you are planning 10 steps ahead. Good Luck, Bill
Posted on: 1/25/2010 1:26 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9446674

RE: Ziroli 124
Barry, I see you are planking your plug. Why not use wider sheets (say 3 inches)? With the size of you plug it should be easy to get them to conform to the cowl radius. This would also create fewer joints and less filling and sanding. Just a thought. Bill
Posted on: 12/13/2009 3:30 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9327542

RE: P-38 SuperCharger Pictures
G-Pete, You think like I do! I plan on making at least one window roll down (servo operated) as well as hinging the overhead canopy. Mechanically there is plenty of room for the roll down, I still am working out the hinge and latch mechanisn for the overhead canopy (I don't want the canopy to unlock and tear off in flight) Bill
Posted on: 12/11/2009 2:36 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9322284

RE: P-38 SuperCharger Pictures
Worth asking. I guess I will be building my own vacuum former. Unless I break it into front canopy and rear canopy. Bill
Posted on: 12/11/2009 12:42 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9321987

RE: P-38 SuperCharger Pictures
G-Pete, Thanks for the offer, I may take you up on it! I was not looking forward to building my own vacuum forming table. How big can you form an object? I have a rather large canopy I will need to pull. Thanks Again
Posted on: 12/11/2009 12:00 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9321878

RE: P-38 SuperCharger Pictures
G-Pete, Thanks for the clarification and pictures. Apparently I am not the only one to mis-label them; even the documentation, schematics and pictures that AT-6 provided refer to them as superchargers. [;)] Since I am not making them functional I only need to see what they look like on the outside. [:D] Thanks Again Bill
Posted on: 12/11/2009 11:07 AM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9321745

RE: P-38 SuperCharger Pictures
Thanks!
Posted on: 12/11/2009 9:28 AM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9321531

P-38 SuperCharger Pictures
I am looking for some detailed pictures of the supercharger intakes on the top of P-38 booms. Thanks for any help. Bill K
Posted on: 12/10/2009 8:04 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9320240

RE: G-10 sheets
http://www.polymerplastics.com/composite_g10.shtml The above link is a excellent source. $44.40 for 36" by 48" 0.005" thickness $73.20 for 36" by 48" 0.010" thickness good discount when multiple sheets purchased. Bill
Posted on: 10/22/2009 8:19 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=9194519

Right wing said bye-bye
This is a crash only (no rebuild here): My old faithful decided to retire itself after many years by folding it's wing during a snap roll. The right wing floated down and wound up 100 yards from the rest of the plane. I guess I needed a little more up elevator to flare for this landing or should I say lawn jart. By the way I did throttle back for the touchdown!!!
Posted on: 9/14/2009 3:52 PM by Author "billk101" in the forum "Crash & Rebuild"
http://www.rcuniverse.com/forum/fb.asp?m=9095170

RE: Curtiss Hawk III Export (BF2C1)
Try http://www.bobsairdoc.com page 35 of online catalog HAWK 3 (?) - Radial bipe w/retracts. Olive and sand camo & roundels. Thailand. W/gear, strut, surface detail. No interior. 6589/23 23.50
Posted on: 6/15/2009 3:25 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=8854117

RE: P-38 Ziroli designed, built and aluminum plated by Metal-morphous
Your 38 looks great! I am in the process of designing and scratch building 1/4 scale 38L. I was wondering what size screws those are? Where did you get them? Thanks, Bill
Posted on: 1/19/2009 9:25 AM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=8375266

RE: Random Thoughts on a Foam & Glass B-17 Short Kit
Where did you get the kit? Thanks. Bill
Posted on: 12/21/2008 3:33 AM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=8266688

RE: Ziroli Corsair Oil Cooler Detail
chevelledude13, Hope these pictures help Bill
Posted on: 12/17/2008 10:55 PM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=8256946

RE: 1/4 Scale F4U-1A Don Smith Plans Build
Gibbs, Here are some additional shots of the: -oil cooler intake (if I recall this area was a topic of debate earlier) -exhaust -cowl with name Bill
Posted on: 12/9/2008 9:23 AM by Author "billk101" in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=8228022