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<DIV>Jerry, we have some pretty good carbs so the idle and mid range shouldn't be too much of a problem, as long the timing is appropriate. I was even thinking of something along the Koger belt drive reduction unit powered by something like a 120 or 145. </DIV>
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<DIV>If Nat can turn a 17x10 in his OS 90 straight out at 7.5K, then it should be possible to reduce the output of a 145 down to about 6K on a 22-24" prop and keep the engine happy. It's times like this that I wish I had a real machine shop around. I can only do so much with hand tools.</DIV>
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<DIV>The webra 160 is a nice rig but it will not turn the large dia I want unless it is reduced.</DIV>
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<DIV>BTW did you put the electric on the back burner?</DIV>
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<DIV>Matt</DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT face=Arial>Matt,<BR><BR>You forgot the 400 rpm idle. : )<BR><BR>BTW - I'm currently flying a motor just like the one Bob describes <BR>below (and it's not made by OS).<BR><BR>Thx, Jerry<BR><BR><BR>>What I would love to see is a lightweight, priced right, fuel <BR>>burning, rear exhaust powerplant that will turn a 22-24" dia prop at <BR>>around 6400 rpm, like the electric set-ups. Some gassies could work <BR>>but are too heavy.<BR>><BR>>Matt<BR>><BR>>With a pump like the 140RX would be nice =)<BR>><BR>>But I'll settle for RE right now.<BR>><BR>>-Mike<BR>><BR>><BR>>----- Original Message -----<BR>>From: <mailto:rcaerobob@cox.net>Bob Pastorello<BR>>To: <mailto:discussion@nsrca.org>discussion@nsrca.org<BR>>Sent: Monday, October 04, 2004 7:05 PM<BR>>Subject: Re: Engines - long<BR>><BR>>As much as I *love* the OS 1.60, and have it working very <BR>>satisfactorily (no - I am NOT sponsored, either!), the 1.60 in a <BR>>rear exhaust would really be a significant improvement in permitting <BR>>lots of designs to use the 1.60. The bigger crankcase, better <BR>>bearing life, lower nitro and more power, reliable starting....like <BR>>Richard said - we just need a RE version.<BR>> Help me out, Jason!!!<BR>><BR>>Bob Pastorello</FONT></BLOCKQUOTE></DIV>
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