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Old 27-01-2008, 11:53 PM   #11
Geoff EL 4.0
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Join Date: Nov 2007
Location: Victoria, Around Essendon Area
Posts: 149
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Quote:
Originally Posted by XCSEDAN
standard one would turn to 14000 with an 11x7 if you REALLY pushed it (i'm talking full throttle vertical dive here for say 300 feet?), this had a lot of porting done, compression raised, a custom race pipe and it needed a certain prop too (it used to change pitch as the rpm/load varied due to its crappy english engineering hahaha)
this engine was STRICTLY for pylon only. and like i said needed a rebuild every 15 flights MAX.
was a really touchy engine, was a bit of fun to screw round with though.

next time we will do an ervine.

i've just pulled up the stock AX page for you to look at ;)
http://www.osengines.com/engines/osmg0547.html
the website says they do more then 14000rpm but geez... can't see it happening unless you were running a 9x5 or similar.
Stock Number: OSMG0547
Displacement: 0.455 cu in (7.5 cc)
Bore: 0.866 in (22.0 mm)
Stroke: 0.772 in (19.6 mm)
Practical rpm: 2,000-17,000
Output: 1.65 hp @ 16,000 rpm
Weight w/muffler: 17.2 oz (489 g)
Includes: #A3 glow plug, E-3010 muffler
Requires: glow fuel, prop
Recommended Props: 10.5x6, 11x6-8, 12x6-7

It has Even bigger props than you are talking about, i think you have your facts wrong
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