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Old Nov 19, 2002, 08:17 PM
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Joined Nov 2002
10 Posts
Speed 400 Spit

I have built a spit, the Heino Dittmar design ,direct drive, 6v speed 400, cam prop but have a lot of trouble hand launching it .
Has any one got a fool proof method of launching.The wing makes holding it on the COG difficult for a smooth launch.
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Old Nov 20, 2002, 09:02 PM
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Jim Ryan's Avatar
Cincinnati, OH USA
Joined Oct 2000
1,961 Posts
What's it weigh? I know some of the fellows who built the Heino Spitfire had them come out a little heavy. Which CAM prop are you using? How many cells and what kind?

Some low-wing planes are more awkward to hold than others. I personally don't find it difficult to hold and launch my own warbirds, but I have to admit that with the big wing fillets, few planes are harder to throw well than a small Spitfire.

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Old Nov 21, 2002, 05:01 PM
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Ceredigion, Wales.
Joined Oct 2000
349 Posts
Wello WB, the Dittmar Spit was my first elec model and came out way too heavy, as a result of sloshing epoxy everywhere, as per my glow days. I put it to one side and now with a fair bit more E experience I have resurrected it, bored lightening holes all over the place and lost 2 ounces!! I have also fitted a 400 cobalt motor. Also to aid launching I have incorporated finger and thumb holes in the bottom surface of the wing, below the CG. It has yet to have its "maiden flight " but it cant be any worse than it was, I hope !!!
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Old Nov 21, 2002, 07:52 PM
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Albuquerque, NM
Joined Feb 2000
3,396 Posts
I thought about getting the plans for this spitfire, but decided to wait until Jim Ryan designs one the "right" way
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