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Old Jul 20, 2004, 06:03 PM
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Pensacola, Fl
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Simple Split Stick (SSS)

The goal was to build a cheap and easy, slow indoor trainer using off-the-shelf
inexpensive electronics. I did it backward this time, first setting a target
wing load of 3 oz./ft^2 then weigh the electronics (1.75oz) then shoot for an
airframe of one ounce. This would call for a wing about a one sq.ft.

I'm too impatient these days for stick building so thought I'd try split
fan-fold for the wing and tail. I used a method well demonstrated here on
the Zone, but I can't find the originator (see pic below). Who ever you
are my unbounded thanks. Using .010" dia. fishing leader the 1/8" drill bits
provide for hot-wire spacing that cuts the material 3/32" thick. With the
FFF skin on the stock weighs .0026 oz./sq.inch.

Next step was to build the baking-jig by www.foamfly.com and when
the wife was out I baked the blank for 25 min @ 200 deg. which produced a
strong wing weighing .4oz.

The fuse is a balsa stick 3/8" X 1/4" X 19-3/8". None of the dimensions are critical.
She fly's great in a single basketball gym, and very good outside when there's just
enough air to breathe.
John

AUW 3oz.
GWS Pico rcvr
Pico Servos
Pixie-7 ESC
2S250 Li-po batt
GWS/LPS-B2C-B(5:1)
GWS-6X3 prop
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Old Jul 20, 2004, 06:06 PM
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Pensacola, Fl
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Here's a shot of the SSS flying at the church.
John
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Old Jul 20, 2004, 09:07 PM
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In my Blu heaven! near Lincoln NE
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John, that looks really great! and big enough to fly outdoors, yet small and light enough to fly indoors as well!

Close ups of the tail feathers?

Span? Chord? CG?
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Old Jul 20, 2004, 09:52 PM
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Thanks Willin,
The CG is in the 1st picture. Span and chord in the 2nd.
John
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Old Jul 21, 2004, 02:31 PM
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Split-stick tail

Willin,
Here's the tail dimentions. Glad to have your interest.
John
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Old Jul 21, 2004, 06:42 PM
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Pensacola, Fl
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237 Posts
(John,
Would the SSS be better than the GWS Tiger Moth indoors, I keep banging into the walls?)

Bill,
That depends on the size of your indoor site. The TM is a great plane, but flies faster than the SSS so it uses up the available space quicker and you have to keep it turning. You can put theTM electronics in a quickly made SSS and try it out for yourself.
Good luck!
John
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Old Jul 21, 2004, 07:28 PM
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Pensacola, Fl
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(John...I've been going with a girl that has a living room 65' x 85' with a
pond in the center. First, do you think the SSS could fly in this space,
and second, do you think the SSS could be rigged with floats to ROW in the
pond?)

Mark-F,
My advice is to temporarily forget about the plane and try to get some permanent
arrangement on the room. Have you considered marriage? After the
honeymoon you could try adding another wing and floats to the SSS as a
starter project to a long and happy marriage. Please let us know how it all
works out.
John
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Old Jul 26, 2004, 11:03 AM
DPN
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John,

This looks like my next project! Looks like a great flyer!

I do have a question. What is the width of the rudder? In the first pic it says 1/2", but in the tail plane pic it shows 1".

Am I missing something here?

Thanks for the inspiration!


DPN
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Old Jul 26, 2004, 12:38 PM
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Pensacola, Fl
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DPN,
Thanks for your interest and for catching the error. The rudder is 1".

I've been flying it a bit more and have found the "C" gearing (6.2:1) to be quite a bit better with 7035 prop. The current drops to .500A and the thrust is about the same as "B" gearing with 6030 prop at .750A.

I've been flying it in the yard at sundown when it's quiet and it goes very well dogding buildings, trees, and cars.
John
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Old Jul 27, 2004, 11:26 AM
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hi guys , i have a very similar plane made from dupron , and balsa sticks...3 oz , etec250
2s, gws pico , and a b2c b ratio,i like the 6x5 prop...i also have the a and c ratio .
this combo flys in a really small area for a very small price...i use to fly every week or two now i fly every day !!!

mike
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Old Jul 27, 2004, 01:38 PM
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OK, Mike,
Why not post a pic of your plane. Yes, the SSS allows me to fly in my 50 X 70 yard something I've never done before. I've found the 6050 flys best on the C ratio gears 6.2:1 with less heating than same prop on the B gears. Great little power system. I'm planning on adding a second wing this week end.
John
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Old Jul 27, 2004, 07:12 PM
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hi john , ya its great flying at home ...i checked my wing and it is 110 sq in at 22 inch with very little camber that may be the dif in me pref the higher pitch speed ...
ive been thinking about a second wing also , but have not done anything about it yet, keep us posted...i have no idea how to post a pict ??? i just learned to turn on a computer !!!! my plane is very sim to yours only the dehidrel is at the root...the foam wing is just scored in 3 lines and a rib glued in ...

mike
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Old Jul 27, 2004, 08:39 PM
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MIke,
I'll be sure to post the biplane info, good, bad ,or otherwise. I wonder if
you are already splitting fan-fold, or did you find the thread that shows
you how, of was my one picture enough?
John
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Old Jul 27, 2004, 08:43 PM
DPN
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John,

I have the wing, fuse, and tail feathers ready to go. Here's a few pics. I just have everything in place for the pics, so some things are straight.

I'm thinking I'll do the electronics and servo placement tonight.

I'll be using a homemade geared motor.

The tires, while huge, weight almost nothing. I make them from 2 foam coffee cup bottoms glued back to back, with a bushing made from a WD 40 spray tube. The tire part is a thin strip of black foam.

Hope to be flying soon.

Thanks for the good design and pictures.

DPN aka David
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Old Jul 27, 2004, 09:08 PM
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Pensacola, Fl
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Hey...that's OK. Cute little devil! Thoes tires look like they'll get in off the floor in about one foot roll-out. Keep us posted!
John
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