Simple reedie throttle from '63
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Simple reedie throttle from '63
This is from a Keith Laumer plan for a B17 control line plane back in 1963. Simple band of brass and a small nut and bolt to make a throttle control. It would have to be made well and carefully to work effectively, but it sure is simple.
Dave
Dave
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RE: Simple reedie throttle from '63
MICRO-FLIGHTs' REVOLUTIONARY and PATENTED throttle control system was based on this same idea. Whenever I've messed around with bent sheetmetal accessories on these engines, the parts end up cracking...then eventually breaking off.
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RE: Simple reedie throttle from '63
This is probably the basis for the simple brass sheet, screw and nut restrictor the guys at the local hobby shop showed me how to make when my first Pee Well .02 was proving too powerful for the 24" and slightly smaller kit free flight planes I was messing with when I was about twelve.
ORIGINAL: fritzke
This is from a Keith Laumer plan for a B17 control line plane back in 1963. Simple band of brass and a small nut and bolt to make a throttle control. It would have to be made well and carefully to work effectively, but it sure is simple.
Dave
This is from a Keith Laumer plan for a B17 control line plane back in 1963. Simple band of brass and a small nut and bolt to make a throttle control. It would have to be made well and carefully to work effectively, but it sure is simple.
Dave
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RE: Simple reedie throttle from '63
The Cox throttle sleeves are the best way to go. As mentioned the brass will crack and fall off after a short time. Mind you if you anneal it after making it then they may last longer. Long enough perhaps? Hard to say but cheap to do. Give 'er a try and let us know. If you do it remember that you don't need a max opening to get most of the power but it's near impossible to close it enough to make the engine stall so err on the side of making the openings too small at first and open them up if needed.
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RE: Simple reedie throttle from '63
Yes, the instant I saw it I though of Mr. MicroFlight.
For a throttle, I would use my 2 washers and the silicon tube idea
I came up with a couple years ago.
http://www.rcuniverse.com/forum/m_28...hrottle/tm.htm
Anyway, I just posted the picture to show just how easy it can be to
do. And Bruce is right, the engine will run at very near full RPM
with perhaps 25% of one exhaust port open.
I have seen the band of brass around the ports used as a restrictor
on a couple of FF plane plans in the past.
Dave
For a throttle, I would use my 2 washers and the silicon tube idea
I came up with a couple years ago.
http://www.rcuniverse.com/forum/m_28...hrottle/tm.htm
Anyway, I just posted the picture to show just how easy it can be to
do. And Bruce is right, the engine will run at very near full RPM
with perhaps 25% of one exhaust port open.
I have seen the band of brass around the ports used as a restrictor
on a couple of FF plane plans in the past.
Dave
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RE: Simple reedie throttle from '63
This looks simple enough even for me. But I've read that a better throttle could be had by controling the amount of 'shut-off' more precisely; like, cut the end at a severe angle, say 15*, and let it rotate closed with the 'gillotene' slice. 'Full open' could be controled with a hole drilled on the other side... which would close about 1/2 throttle and allow the 'slice' to work better. .015" brass sounds good... I'm going to try that in the spring. It's -15*F now... too cold for a 'tail gate party' before the Packer Game.