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Show us your scratch built foamys

Old 10-25-2006, 05:32 AM
  #26  
Omaha_RC_Flyer
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Default RE: Show us your scratch built foamys

Gary,

I just noticed your post count, Welcome to RCU! A few more questions, and I'll leave you alone. How do you have your motors hooked up to the esc, in series or parallel? What ESC are you using? What was you AUW?

Thanks,
Omaha
Old 10-25-2006, 05:59 AM
  #27  
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Default RE: Show us your scratch built foamys

Here are a few more of mine. The first one is a fff blue stick that I designed, and the second one is a Rebellion 3D. I CAD designed the Rebellion 3D, sent the file to a laser cutter, and had a few of them cut for beta testing. The one pictured has a laminated wing, similar to [link=http://www.3dfoamy.com/images/Parts/DSCF0054.JPG]3DFoamy's G-force wing[/link]. I painted it with Krylon Shot Cuts paint. The plane never got much interest, so I haven't tried to sell any. I have also attached a pdf of the standard version Rebellion 3D builders plan. Here is an older video of the [link=http://media.putfile.com/Rebellion-3D2]Rebellion 3D[/link], when I was trying to get into the foamy retail market.


Later,
Omaha
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Old 10-25-2006, 06:19 AM
  #28  
Flypaper 2
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Default RE: Show us your scratch built foamys

Another pair of old turkeys.
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Old 10-25-2006, 12:38 PM
  #29  
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Default RE: Show us your scratch built foamys

Omaha,

Thanks! The motors are hooked up in parallel to a Great Planes C-10 (brushed) ESC. Flying weight is 9.5 ounces, area is 372.6, for a nice light wing loading of 3.92 oz/sq ft.

Nice looking Stick and Rebellion.

Flypaper,

Hobby Lobby Pogo? Burrrrrrrrr! Too cold for me!

Gary
Old 10-25-2006, 12:49 PM
  #30  
Flypaper 2
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Default RE: Show us your scratch built foamys

Nope: This was scratchbuilt about a yr. before the Hobby Lobby Jobby. Yep about the cold. Good thing we have a woodstove in the clubhouse. All we need now is a Jacuzzi.
Old 10-26-2006, 02:03 PM
  #31  
five-string
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Default RE: Show us your scratch built foamys

Here's mine. Not fancy but very fun. I didn't spend much time making them look too good 'cause I'm still learning how to not crash...

Edit: Now that I can see the photos, they are, in order...
1. VTO
2. 150% Mugi, aerial photographer
3. SU-27 Sukhoi
4. 100% Mugi
5. Nasty

I've built about 6 mugis, different sizes and prop locations, two Nastys, and a couple others that never flew (yet).
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Old 10-30-2006, 10:21 AM
  #32  
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Default RE: Show us your scratch built foamys

Five String, where did you find the planes for the 27? I'm looking for some free foamie plans for some kind of streamlined jet such as that in flat foam and/or EPS foam. Want to build a very light/very fast jet and so it needs to be a very streamlines/slender design. Don't want plans that are over complicated either.
Old 10-31-2006, 09:49 AM
  #33  
soarhead-RCU
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Default RE: Show us your scratch built foamys

My sorta bf-109;

Made out of 3mm and 5mm foam Weight is a little over 6 ounces powered by GWS IPS-a gear and Pico electronics. Craft store paint and paper insignia. Flys decent in a basketball court area or half football field. RET controls and 24 inch ws with about 150 SQ inches of area.
Bob
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Old 10-31-2006, 10:17 AM
  #34  
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Default RE: Show us your scratch built foamys

Blue stick version 2, with a brushless set up. Same wing, just a different fuse stick ( 3/8" vs. 1/4" ), and a new tail section. Flew it yesterday, but it was way to windy, to tell how well it will handle. Although, it has a pretty tight loop on high rates. I'll try it again on a less windy day.


Later,
Omaha
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Old 11-15-2006, 10:34 AM
  #35  
RickAvery
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Default RE: Show us your scratch built foamys

Here's a bash/scratch built foamy twin. I used a GWS a-10 wing which survived the the poor old girls last fatal flight. And then using some EPS ice chest coolers, similar to the one in the pic, fashoned up a fuselage. The tail feathers are depron. I used some cheapo HobbyLobby esskay 400XT motors, cheapo 18A Hi-Model ESCs, 3 HS-55 servos, aileron, elevator & steerable nose wheel, MAS 7X5 3 blade props & a cheapo 1800mah, 3 cell, 12c Dymond LiPo which gives 10+ mins of cruise around fly time. I love to use up old parts and stuff. Happy flying.
Rick
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Old 11-17-2006, 04:17 PM
  #36  
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Default RE: Show us your scratch built foamys

Hey All! this pair of mini fighters are alot of fun. 12mm brushless cans with 3x2 props, kokam 7.4 700ma... 16" wingspans, taileron control... both are made with 4 pieces of fff and a sliver of depron and weigh about 7.5 oz. String, the Mugi sniper finally bit the dust( yeah, inverted) the Sky cruiser 175 is flying well... the Quad power wasn't enough so I put a Himax hc2812-1080 on it and its almost unlimited vertical.... pics to follow... Its always amazing to see everyones ideas on this site.... KEEP UP THE GOOD WORK!!! Pce
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Old 11-17-2006, 04:41 PM
  #37  
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Default RE: Show us your scratch built foamys

Heres the big Mugi and the sniper... its actually fixable.... and some old scratchbuilt airframes...
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Old 11-17-2006, 08:11 PM
  #38  
sr71fan
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Default RE: Show us your scratch built foamys

Wow! Lots of cool planes in here. What a great hobby!
Old 11-18-2006, 09:19 AM
  #39  
five-string
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Default RE: Show us your scratch built foamys

I have another one. Although it is not officially scratch built, I did make the parts from fan fold foam. I used a Slow Stick chassis (fuse, motor, prop, servos and mounting hardware) and added a set of fff wings to look like a bird. I ended up removing the wheel pants due to performance issues. I also shortened the fuse 4 more inches after the first photo to join the tail to the wing more.

Behold the Buzzard Stick!....
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Old 11-18-2006, 09:45 AM
  #40  
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Default RE: Show us your scratch built foamys

Critter, didn't mean to diss you. I just haven't been in this forum for awhile.

Here's the plans for the SU-27 profile jet. Very easy and simple build.

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Old 11-18-2006, 10:52 AM
  #41  
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Default RE: Show us your scratch built foamys


ORIGINAL: five-string

Critter, didn't mean to diss you. I just haven't been in this forum for awhile.

Here's the plans for the SU-27 profile jet. Very easy and simple build.

Not a problem. I type too long of messages anyway so people tend to skip over them and miss any important stuff. Thanks for the plan link. That will be my next build or the one following it. Thanks again.
Old 11-18-2006, 09:41 PM
  #42  
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Default RE: Show us your scratch built foamys

Here's my latest
Old 11-18-2006, 10:10 PM
  #43  
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Default RE: Show us your scratch built foamys

nice!

how does she/he fly?
Old 11-19-2006, 07:43 AM
  #44  
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Default RE: Show us your scratch built foamys

It is a good flier... not the most stable, but decent.
It's made out of two sheets of fan fold with a spar across the center. I didn't weigh it yet, but I'm guessing around 12oz.
It flies like a brushless Zagi on steroids...unlimited vertical.
It rolls on a dime. I haven't had the guts to roll it at high speed yet (afraid of what might happen)
It has a Komodo motor with a 7x3.5DD prop and I run it with a 1320TP 11.1v.
Old 11-19-2006, 03:33 PM
  #45  
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Default RE: Show us your scratch built foamys

great job on the detail
Old 11-19-2006, 06:18 PM
  #46  
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Default RE: Show us your scratch built foamys

Figured I'd post another couple of photos of my aerial platform I'm building. Running BP21 motor, a 7x4 or 8x4 APC prop, 2000ma 3 cell lipo, 25 amp speed control, two HS55 servos for an elevator/rudder setup. 36" wingspan, 4" thick fuse by 5 and 1/2" inches tall (Yep, wanted it thick to protect the pocket camcorder that is going up inside the fuse right at the COG spot). 3V voltage regulator to ditch the two AAs in the camera and run it right off the plane battery, complete with a protection circuit. Rudder/elevator should give the plane more doscile traits for stabile video. Didn't want a rocket or a real agile platform. Having never flown a rudder/elevator setup (no ailerons) I decided to put some deheidral in the wing. Even though I've flown this type of clark-y wing on other builds that was only with aileron/elevator so this was new to me, as you can tell since I probaby spelled it wrong. A few people warned me that rudder might present more of a problem to correct wing tipping. I figured the massive fuse under the top mounted wing would help prevent any problem but figured I better curve it just the same to be safe. I just weight it down and propped it up to the proper curve and then heated the foam with a hair dryer to temper it, then used some spray glue and Extreme strapping tape to give the curve more strength. Despite the rather thick carbon tube I put in the bottom of the wing I was able to tempter it pretty easily. Was also surprised just how strong the temper is. Won't budge unless you really tork on it. This hot wire cutting has taught me more about planes than anything else. Haven't decided where the motor as a pusher is going yet. I was planning on the very end of the fuse but may mount it on top of the fuse just behind the wing. Always wanted to try that sort of setup. I was tempted to throw HS81s in it but I'm trying to keep the weight down. Man, those HS55s are tiny compared to them. Hope they hold...

She's still a bit rough around the edges yet but that's 'cuz it's still under construction. Wasn't planning on trying to make it look good but all things considered for a free hand two minute design she's turning out better looking than I thought. Sort'a like a water tanker or military cargo plane.

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Old 11-26-2006, 07:54 PM
  #47  
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Default RE: Show us your scratch built foamys

Here's a few pictures of the new camera platform build. 4" wide by 36" long fuse. I think the fuse height is 5 or 6 inches or so. 7 inch wide by 48" long clark-y wing containing a carbon tube for strength and has been tempered with heat and extreme strapping tape to curve it for maximum stability. Controls are rudder/elevator. Right now with servos, ESC, and motor and prop installed the plane weight is only 17 ounces! That's without the RX, battery, or some tape in strategic areas. Still, with those added and the camera (very light) I'm expecting it to be well under 30 ounces. If that holds true she should land at a walking speed. She's still a work in progress so she aint too pretty yet. Have to hide the electronics in the fuse and if Gorilla glue isn't sandable then she never will get to be a ten. First time I've worked with the stuff. But hey, either way, I wanted a good aerial platform so looks come second. Some of the "fine" features to notice are the motor mount made from a fish filter tube and some kind of fish filter 90 degree bend at the top. It's very light yet strong. Hope it doesn't look so "fishy" once it's painted. I put a pack of smokes on top of the wing for scale. Still have to figure out how to mount the wing to be removable for transport.
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Old 11-28-2006, 10:32 AM
  #48  
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Default RE: Show us your scratch built foamys

Just did some wing loading match for this camera platform build. It looks like the plane should fall well below 30 ounces once complete. With the 48"x7" wingspan (336 square inches) and a worse case weight of 30 ounces the wing loading will be 12.857 ounces per square foot. A typical glider has 10 ounces of loading per square foot and a typical trainer has 15 ounces per square foot. So, it looks like the plane should have very good slow flying ability which is what I want. Just hope I can keep the weight at 30 ounces or lower. So far that looks like a very good possibility, but even if I go a few ounces over 30 it should have very good slow speed ability if it falls into the trainer range.

Last night I mounted the removable wing system. A basswood block glued to the top of the fuse. Thin plywood epoxied to both sides of the wing at the fuse area. Two nylon bolts with washers go through the wing top/plywood and thread into the basswood. Works good and not much weight to it.

Old 11-28-2006, 12:21 PM
  #49  
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Default RE: Show us your scratch built foamys

Need a little help figuring out the motor thrust angle for this build. I normaly just mount the motor looking as straight as possible but figured I might want to be as percise as possible with this build. First, on a pusher with the motor at the very tail of the plane cocking the motor's prop end a little lower than the front will cause down thrust and force the nose down a bit. Elevating the prop end up will cause the nose to lift. I would figure on a setup with the prop mounted on the nose as a puller setup the reverse would be true (prop at front a little high will cause lift and a little low would cause downward thrust).

I've read reference to the standard being one degree right thrust and three degrees downward on a mount (or maybe I have that reversed). I'm also confused as to how this off setting will effect things if the motor is near mid body. As you can see from the photos the motor is mounted roughly 2/3rds back on the fuse. If things become neutral towards mid fuse then does that mean up/down thrust should be at neutral but I'd still want a little right thrust (cocking the prop pointing slightly left)? Currently I have the motor mounted with the prop end a hair up which should cause the nose to lift. However, I've noticed that many like to have downward thrust to keep good air pressure on the wing for better control. Either way, if anybody can walk God's less gifted through what degree of up/down left/right I should probably shoot for that'd be of great help. Also, how to measure this using a balsa disc on the prop shaft instead of the prop as a guide, probably using a protractor?


Old 11-30-2006, 10:02 PM
  #50  
3D-Flyer Kevin
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Default RE: Show us your scratch built foamys

Hey five-string how is the VTO? Have you flown it yet? Was it an easy build? One more question what is five-string refering to? Is it refering to a guitar?

Kevin

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