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Feb 15, 2007, 07:05 PM

specs for bluefoam birtha


Fuse: 45” long , cutout for the wing 10 ˝” from the nose. Is 9” wide X 2” deep with the front 3/16” higher off the thrustline then the rear-- how many degrees of incidence it is I 'm not sure. thrustline from the motor shaft to the H stab


Wing: 74” long; root cord is 9”; tip cord is 5” ; ailerons/flaperons 1 ˝ X 19” (should have been bigger or more outboard) .. started with 2” bluefoam stock.

Horizontal stab: 16” , root 6” , tip 3” , elevator 1 ˝” .. just an 1/16" of incidence off the thrust line

Vert stab: 7” shaped as shown rudder 1 ˝ X 2” at the base


The fuse is 2 pc of 1 ˝” foam laminated together after the fuse was roughly cut out… I took this opportunity to glue in some reinforcement between the two halves and used weedwhacker cord.(lol) .. made shallow razor cuts filled with glue, pressed in the cord, then glued the two halves together with liquid nails product that’s foam-safe (gorilla glue would have been better I think). Just tried to make sure I didn’t place the cord where anything would need to be cut.. like the battery bay and wing seat. clamped it up as straight as I could..

If you don’t have heavy packs the wing placement may need to be further aft for balance but not much.. this config flies fine with anything from 7-10oz. packs places where they are.. much less then that acts tail-heavy.

ESC: https://www.unitedhobbies.com/UNITED...idProduct=2163

Servos: https://www.unitedhobbies.com/UNITED...?idProduct=662 they look to be on backorder and I’m not surprised!

RX: https://www.unitedhobbies.com/UNITED...idProduct=3828

Motor: http://www.rchotdeals.com/Products/r.../240918ss.html

I’m running 4s 3100 packs that are old 12c polyquest

Prop is a 10x6 folding and looks to be APC but I can’t remember.

Wing spars were CF rod. a 40"x4mm , 28"x 4mm

Everything else was homedepot stuff

Nylon Wingbolts , nuts, and washers, 1/8" dowl for control rods, packing tape for hinging the tail surfaces, and I used dubro hinges for ailerons with foamsafe CA and skinned the ailerons with packing tape to stiffen them..

I hit the whole thing with two coats of water based poly in a rattlecan just to seal it.. I may stil put some color to it other then the black under the wings cuz that blue sure gets lost quick when I speck it. probably an all black belly and all white top.
Last edited by Maine_Flyer; Feb 15, 2007 at 07:16 PM.
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Feb 15, 2007, 11:17 PM
Registered User
Maine flyer ! thanks for those details. now i wll start on my glider
Feb 15, 2007, 11:18 PM
Registered User
if you remove the landing gear and hand launch will help will less drag and better glide.
Feb 16, 2007, 07:01 AM
Quote:
Originally Posted by sajeev
if you remove the landing gear and hand launch will help will less drag and better glide.
yup, especially with skis .. probably hampers penetration I'm sure .. I used the light ply and blind nuts with thumb screws for attachment just so they could be removed quickly.. I used this method on all my foamies with gear. I fly a lot where there is no runway, hand launch and belly land.. a lot of farmland around here..
Feb 16, 2007, 07:27 AM
Quote:
Originally Posted by Eric.Payan
Two pictures from my Fouga Sylphe :





The real thing is a french 50th jet-glider.

1,5m wing span, 580g.

The very powerfull ELE ducted fan allow 60° climb (40 A !), and the 3000mAh battery give long flight (15 minutes). The plan is build with 3mm depron (the wing) and foam (the fuse). The gliding ratio is good for a foamies but the wing are realy flexible (to depron sheets folded on a fiberglass spare).
thats awesome!... been looking for something to build around this puppy.. should provide near 30oz thrust on 4s... HMMMM! was gonna attempt a U2 design with internal ducting.. but..
Feb 16, 2007, 03:51 PM
registered foam addict
chara's Avatar
Thread OP
EDF on a glider is kind of a mismatch. Like a Ferrari-motor on a tractor ....but looks SOOO COOL!!!
whoever makes a scratch built one, don't forget to post pics please!
Feb 16, 2007, 04:08 PM
registered foam addict
chara's Avatar
Thread OP
Quote:
Originally Posted by birdofplay
Chara, You are speaking BLASPHEMY !!!

must 3D everything :-)))

WOW another Fouga Fan !!!

This old surviving pic was a built up balsa model with an old .10IC engine.

I was at 1600' one morning the the first sortie returned from "up north"!
The first plane pitched out and went between ME and the Glider !
I'm talking F-105 thud's !!!

I know it was 1600' because base ops told me where the deck was
that morning and I'd flown into it and had to spin out the bottom.
what a handsome guy! ...Bob is that really you?!
cool story about the thuds. I've done some bird strike clearance investigations in the past but we actually never considered the hazard of hitting a 2m model plane gone wild!

accept my humble appologies for the blasphemic words. of course I would immediately reverse-engineer such a no-plan design in a 60hours 3d CAD session. Just in case I would ever need plans. you never know...
Feb 16, 2007, 05:43 PM
Retired CAD guy
birdofplay's Avatar
Absolutly TRUE story.
Just one of my "War Storys" from Tahkli Thailand 1969-1970.

That is where I started out doing R/C with a boxy RED Logictrol Radio 5ch.
I moved up from the Fouga 2 ch to a GB Falcon 56 4ch.
The Fouga crashed into some hooches when it turned AWAY when on base leg
and I didnt notice it until too low !

Guys would leave models behind so we'd have fun with them , like ...
We turned an old beat up Lanier into a U-control and flew it on double length
lines, with the ailerons permanently set to bank right.
A wingover resulted in the model going over the top horizontaly !

I suppose a 2-3-4-5 lbs model would do some serious damage to a small GA class
plane. I had a flight of 5 ducks cross my path very closely at ~5000agl !
Talk about a WAKE UP !

My previous FBO hit a Vulture at 10,000 with a 180 Comanche and it caved in the
LE all the way back to the Spar ! No gas at that location luckily !
Plane still flew pretty OK.
Now get this ...
He pop rivited some sheet aluminum over the hole and flew home !!!
Feb 18, 2007, 06:55 PM
Registered User
carlospq's Avatar
Following this instructions:

http://guideaearv.modelisme.com/Cons...shark.htm#haut

this is the Shark with v-tail and ailerons.

WS 1200mm
Motor BP21 1750 rpv
Folding prop 7x6"
Weight 600 gr.
Battery 8NiMh 2/3A

Wings are made of depron 3mm, and fuse is extruded PS with a 6mm carbon boom.
v-tail is depron 6mm.
Last edited by carlospq; Apr 11, 2007 at 02:44 AM.
Feb 18, 2007, 08:28 PM
Retired CAD guy
birdofplay's Avatar
Here is some of what I have re the Fouga Cyclone.

The Sylphe was a variant or viceversa ???

This should get you started


The one I built in 1968 had a slot in the fuse to clear the prop.
what can I say, It worked.
I just dont know where the plans are for that one any longer.

Keep us posted with results
Feb 19, 2007, 02:22 PM
registered foam addict
chara's Avatar
Thread OP
carlos,
thanks a lot for the pics and the link (was a good exercise for my french skills )
this is looking great! V-tails have their own appeal!
greetings
chara
Feb 19, 2007, 02:30 PM
registered foam addict
chara's Avatar
Thread OP
that EDF-sailplane combination is pretty cool! I remembered having seen such a thing in full scale. I mean a real sail plane that had two of those expensive little turbines for model airplanes mounted on a retractable pylon. A guy was using that setup in airshows where he would fly around innocently in sail plane mode and then pull out the turbines and doing some crazy high speed passes and climb-outs!

here is the link:
http://www.silentwingsairshows.com/jet.html

whatch that little video:
http://www.silentwingsairshows.com/video/jet_glider.wmv
Last edited by chara; Feb 19, 2007 at 02:36 PM.
Feb 19, 2007, 03:01 PM
Retired CAD guy
birdofplay's Avatar
Chara,

So you think you want to have TWO jets ?

Try these, they are along the same lines as the Cyclone
Just doubled :-)

comment vous dites, wah la !
Last edited by birdofplay; Feb 19, 2007 at 03:07 PM.
Feb 19, 2007, 03:18 PM
registered foam addict
chara's Avatar
Thread OP
wow cool plane! looks like the Cyclone is some kind of predecessor of the Fouga Magister (the mouse killer).


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