Sig 2m Riser, what motor? - RC Groups
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Jan 24, 2003, 06:33 AM
Registered User
David Smith's Avatar

Sig 2m Riser, what motor?


I have got half way thorugh building a Sig Riser (the 2 metre version) and decided I don't want to bother wiht the bungee any more (not my first sailplane!) Been thinking of stepping into electrics, so would like to electrify this one, what is the best set up? I need something cheap, light and reliable (of course!
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Jan 24, 2003, 12:27 PM
Ascended Master
Sparky Paul's Avatar
Endoplasma 16T, 30Amp ESC, MA 3:1 box, Aeronaut 12x9 folder, 8xpractically anything cells.. 800 to 1300 are good for climb and low weight.
You WILL be happy!
Jan 24, 2003, 12:46 PM
Registered User
pda4you's Avatar
I agree on the endo - great little motor for 2m jobs.

Let me know how you like that Riser - I am thinking about it for my next sailplane project. I like that Filip really well also though!?!?!

Mike
Last edited by pda4you; Jan 24, 2003 at 12:48 PM.
Jan 24, 2003, 12:50 PM
Registered User
David Smith's Avatar
Thanks, is that a concentric gearbox, because I don't thnk I can fit an offeset one in the nose.

The Riser is a decent enough 'old fashioned' kit - most of the parts are printed on the wood and need cutting out, ony the wing ribs are ready cut.
Jan 24, 2003, 12:54 PM
Registered User
pda4you's Avatar
I like the MP Jet gearboxes - They are good to about 300 watts or so. Good for what you are doing. They have a 3.33 and a 3.8. Either would be good. Can't beat that for $23 bucks.

http://aircraft-world.com/products.asp?id=39

Mike
Jan 24, 2003, 01:03 PM
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David Smith's Avatar
Thanks, the gear boxes look good, that shop is in Japan, do you know if there anything similar available in Europe?

Quick edit to that - just found them over here!
Jan 24, 2003, 01:14 PM
large member
vario's Avatar
endoplasma 4 sure

i have the system that sparky suggested and its great for the money!!!

vario
Jan 24, 2003, 01:18 PM
Registered User
pda4you's Avatar
I don't, but John Emms from Puffin Models might. He hangs around here a bit.

http://www.puffinmodels.com/

Dave at Aircraft-World is great. Worldwide shipping is only US $2.50 can't beat that.

Mike
Jan 24, 2003, 01:18 PM
Registered User
They're available in Sweden from www.hab.se

http://www.hab.se/vaxellador.htm (in Swedish)
Both 3.33:1 and 3.8:1 costs 255 SEK (about 28)

/Stefan
Jan 24, 2003, 01:28 PM
Registered User
David Smith's Avatar
Sweden's good, so close it's almost home! Thanks for the link. I'll ask around, they may even be available in Finland!
Jan 24, 2003, 01:31 PM
Almost a Pilot
Mauilvr's Avatar
Here's another vote for the Endo with an MPJet 3.8:1 planetary box, 8-CP1300 cells and a 12/9 or a 13/8 prop.

Here in the U.S. you can get the Endo at Tower Hobbies ($19.99) and the rest at Hobby Lobby.

I did get my gearbox from David at Aircraft-World (cheaper, too!) because Hobby Lobby was out of stock.
Last edited by Mauilvr; Jan 24, 2003 at 01:39 PM.
Jan 24, 2003, 02:33 PM
Ascended Master
Sparky Paul's Avatar
You can fit the MA gear box into a pointy front end..
Jan 24, 2003, 06:37 PM
Registered User

electrifying a Riser


I built one and after trying it on a highstart, I made a pylon to mount a motor over the wing. I flew it with a 400 long can and a 3/1 gearbox, with an 11- 5,5, then with a jeti 30-3, both with 10 cells. It is pretty light, and went straight up with the Jeti and 10-1250 scr's. I have a smaller wing also. It is a pretty nice flying plane and was short money for the kit. I poly-fiberglassed mine too. Ill look for some pictures.
Jan 24, 2003, 09:12 PM
Registered User

riser with "modular pod"


This is sort of stock. The pod is held on with elastics, just like the wing Pretty retro, huh? The wing is a 66" one from a Sterling Taylorcraft kit with a coiuple extra bays and polyhedral. I have te stock wing too. Weight is over or under 3 lbs, depending on the cells.
Jan 24, 2003, 09:16 PM
Registered User
I used 1400 AE's, 1100 HECELLS 10x 2 packs in parallel, and the 1250 SCR's. I have had a lot of trouble with the BEC ESC and the 10 cells with brushed motors. The Jeti motor and non-bec 40 amp gold label ESC perform flawlessly


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