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Sig Dorner 217 help

Old 04-24-2010, 01:55 AM
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Default Sig Dorner 217 help

Hi all Just wonted to share my conversion of my sig Dornier. Also I have a question will this work fuel line take off from tank to engine. Had to over bend my fuel line brass tubing from tank to mis leading edge of wing..

Thanks
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Old 04-24-2010, 01:58 AM
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Default RE: Sig Dorner 217 help

With both engines
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Old 04-24-2010, 08:22 AM
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Default RE: Sig Dorner 217 help

I got a question is this a kit or scratch build, just wondering where to get the kit or plans
Old 04-25-2010, 12:12 PM
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Default RE: Sig Dorner 217 help

Hard to tell in the tiny images. I would be a bit concerned about the distance between tank and engine though. The fuel draw is not so good in the TT07, and in a nose up situation I might go too lean when the tank is too far away from the firewall.
Old 04-25-2010, 08:21 PM
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Default RE: Sig Dorner 217 help

Hi This is SIG DORNIER DO217 KIT $79.99 Here are the spec. It is a vere nice kit to build. This is my first EP to Glow conv. I have been building on this plane for some time now. Would like to finish but still need a few parts. I have a photos of my build if you would like to see.


Thanks

Specifications:
Imperial
Metric
Wingspan: 47 in. 1194 mm
Wing Area: 335 in² 21.6 dm²
Length 37.5 in. 952 mm
Flying Weight: 30-35 oz. 850-990 g
Motor
(2 Required) 40 - 70 Watt Motors
Radio
Required: 4 Channels,
3 or 4 Micro Servos
Controls: rudder (optional), elevator,
ailerons, motor
Old 04-25-2010, 08:31 PM
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Default RE: Sig Dorner 217 help

HI Mr Cox here is a dwg I maid to help me with the conv. This should help.


Thanks for looking.
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Old 04-27-2010, 10:48 AM
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Default RE: Sig Dorner 217 help

I think the tank is to far away from the engine. It might be fine when the plane is level but with the nose up I think it will have a hard time to draw fuel, and will lean out too much.
A custom made tank right behind the firewall would be better for the engine.

To me the TT07 is very sensitive to the tank placement. Mine ran fine on the bench but in the air I had a few lean runs and that was it...
Old 04-27-2010, 06:33 PM
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Default RE: Sig Dorner 217 help

Thanks for the help.Do you have a link where to buy custom made tanks or can I use a pump and draw from both tanks then feed both engines?
Old 04-28-2010, 03:03 PM
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Default RE: Sig Dorner 217 help

I don't really have any links but people doing CL are used to making these out of thin sheet metal.

It is also possible to use almost any plastic container, like a film can for instance (a bit small in volume here though). By heating an undersized wire you can melt holes in the can so that you have a tight fit when pulling a silicon tube trough it. It may sound odd but it seals well.

You could also use balloon tanks right behind the fire wall. These would adapt to the space available, are lightweight and provide pressure to aid the fuel draw.

There is plenty of information on the 1/2A forum. Try the search function or simply place a question there too, lots of experienced people there that might not follow this conversion forum but would surely be interested in a 1/2A twin endeavor.
Old 04-28-2010, 09:35 PM
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Default RE: Sig Dorner 217 help

Mr Cox thanks for the help. Was searching web and found a suppler for balloon tanks. Also found thread in 1/2a forums on this subject.

specs. Balloon Tank for 1/2A Capacity 1-3/4 oz $5.95

http://www.rsmdistribution.com/index-2.htm

What do you think about this. Will be using pull pull system on Rudders.

Thanks again.
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