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Old Jun 04, 2008, 12:33 PM
56S
Certified Balsa Breaker
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Joined Nov 2006
1,468 Posts
BTW, for spinner mounting on the STA, I used a GWS prop adaptor. On the Rearwin, I replaced the 1811 shaft with a LPS drive shaft. Saves a bit of weight and allows the rubber spinner to be used. A section of heatshrink tubing over the 2mm shaft allows IPS spinners to fit. I don't think I'd try this on 3s as you can see the rear of the spinner expand at WOT.

Dan
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Old Jun 06, 2008, 12:05 PM
Tarzanstyle English Sorry
AgoMago's Avatar
Cittadella(PD)(Italy)(Europe)(World)
Joined Nov 2004
518 Posts
Aircoupe

Just finished
From Walt Moony peanuts plans
Aircoupe semi scale.
WS:40cm
weight:68g
UH 5 g motor
2 UH 3,7 g servos
10A UH esc
BA 5 ch receiver(with home made loaded antenna)
200 mAh 2s battery
All home made frame and spoked wheels..
Covered with paper
Waiting for maiden..hope it fly...(CG is ok...)
Ago
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Old Jun 06, 2008, 12:50 PM
diy heli maker
U.S.U.L's Avatar
Poland
Joined Sep 2004
615 Posts
Something a bit different from me

Almost completed, designed for 3D flight, with 240mm rotor diameter, collective pitch, 120 ccpm swash and shaft driven tail.
AUW should be about 55g with 10g motor(using cf shaft), 3s180mAh battery pack and 6A ESC.
More details here http://www.rcgroups.com/forums/showthread.php?t=871709
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Old Jun 12, 2008, 11:08 AM
Flying high
billwhit's Avatar
Seattle, Wa
Joined Dec 2002
2,263 Posts
Here is a quick video of my HyperX with the 10 gram outrunner. Has plenty of power with a 3 cell lipo.

HyperX Conversion (2 min 12 sec)
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Old Jun 14, 2008, 03:41 PM
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Terry Rigden's Avatar
UK, Bedworth
Joined Apr 2004
2,635 Posts
75g delta

Here's my offering :-

500 mm span delta with KF airfoil
AUW 75g wing loading about 2 oz /sq ft
Motor Indoor flyer 9g brushless 5x3 GWS prop
ESC Indoor flyer 6A
Rx GWS Pico 4ch
Servos 3 x Indoor flyer 4g
Battery x 2 1S full river 250 MAh

CG 52% - 10% ahead of mean aerodynamic centre
Moved to 48% after flight tests

Airframe from 3mm depron with balsa spars no CF reinforcement, but the fin might need it

I'm using two separate cells to make up a 2S pack so that I can use then on their own on other models.

First flight was very hairy the model was ultra sensitive in pitch. Now moving CG to 48% by moving batteries forward. Also found it needs more down thrust

Regards Terry
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Last edited by Terry Rigden; Jun 17, 2008 at 07:03 AM. Reason: Now test flown
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Old Jun 14, 2008, 08:40 PM
a little kid at heart
poulsbobill's Avatar
Poulsbo, Wa
Joined Sep 2004
1,234 Posts
Terry,

I think she'll fly! Looks like she should be quite a floater. I think that is very clever with the two seperate cells. I think i will try that. Maximum flexibility!!


Bill
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Old Jun 15, 2008, 06:00 AM
Registered HotGlue Addict
chaosMurphy's Avatar
Joined Dec 2006
1,456 Posts
2oz/sqft WOW! fly sweet for sure
Elevator or elevons?
Does she have a keel?
Step appears tapered, height at center?
Thanks for sharing
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Old Jun 15, 2008, 02:55 PM
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Terry Rigden's Avatar
UK, Bedworth
Joined Apr 2004
2,635 Posts
Gramps

Yes it has a keel 10 mm at the front widening to 40 at the rear with quite a bit of the rudder area underneath the wing.
Control is via elevons mixed at the trnasmitter.

The step is at 50% chord and is 14mm at the root tapering to 3mm at the tip.

The weather hasn't cooperated so no moment of truth yet.

Regards

Terry
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Old Jun 16, 2008, 10:09 AM
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indoor_fr's Avatar
Paris (France)
Joined Jan 2006
851 Posts
Here's an other one :

24" Cessna 170 kit from Guillows

AUW: 85g

5,5g Brushless motor with 5030 prop
2,4g MPS Rec
5g ESC
2 x 2,8g servos
2S 250 mA.h lipo pack

Nose is held by mean of magnets

Wings can be removed for transport and are linked ogether by rubber bands.

I've begun to make this kit in .... 2003 and finlly finished it in 2008 after 5 years in a box!

It flies very well indoor.
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Old Jun 16, 2008, 10:15 AM
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Utica Il.
Joined Dec 2002
4,222 Posts
She looks really nice!
I should build mine!!!

Randy
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Old Jun 16, 2008, 10:27 AM
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danrc's Avatar
Rockford Illinois
Joined Jan 2008
2,327 Posts
That 85g weight is good to see. I have a 5g brushless and I was starting to wonder how much model this thing could tug around.
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Old Jun 16, 2008, 11:08 AM
Registered User
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Paris (France)
Joined Jan 2006
851 Posts
Thank you, Randy

I would not recommend a guillows kit as the wood is heavy. I think that easy built models are lighter and thus more adequate to an RC conversion, and furthermore, they have plenty of nice models.


Danrc: Normally, the thrust is 70g with this prop, so it's ok. My plane cruises at half throttle.
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Last edited by indoor_fr; Jun 16, 2008 at 03:44 PM.
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Old Jun 16, 2008, 06:13 PM
Registered User
Singapore
Joined Nov 2004
102 Posts
10g brushless motor
5" GWS prop
2S 250 mAH Lipo
Plan enlarge from micropitts design for RFFS system
2X 3.6g servos
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Old Jun 16, 2008, 07:37 PM
56S
Certified Balsa Breaker
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Joined Nov 2006
1,468 Posts
UH 1811 powered Rearwin Speedster 6000M

This is a Golden Age Reproduction kit converted to RC. 30" wing, AUW 5oz. BA 3.6 servos, FLightpower 2s 350ma 18c Lipo. Carbon fiber rod sprung landing gear. Flies nice. Rudder to enter turns and aileron to pick the low wing on exiting. Normally cruises at 1/2 throttle with a trimmed GWS 7035. Motor sharft was replaced with a GWS IPS shaft to allow the spinner. Funtional cooling inlet and exhaust. A calm evening flier.
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Old Jun 17, 2008, 03:58 AM
1 paycheck away from homeless
ghostmechanic's Avatar
United States, KS
Joined Mar 2006
4,574 Posts
U.S.U.L. I'm not a heli guy at all. But you never cease to amaze me. That thing is friggin sweet! I can't wait to see a video.
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