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It looks interesting. Are they sure about
that 55 lb weight?? They’re getting pretty close to a 1:1 ratio weight to
HP. (Wish I could get that with mine! J )
One thing for sure, they are doing it
right: Sell a FWF package (except I didn’t see anything about an engine
mount).
Joe Hull
Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)
Redmond (Seattle),
Washington
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Russell Duffy
Sent: Wednesday, September 13,
2006 7:49 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] XR-40
Has anyone looked at the XR-40 engine that the Phantom guys
are testing? http://www.rotary-xr40.com/
As I understand it, these are go kart engines that normally run up to 10,000
rpm, and make about 52 HP. For aircraft use, they are derating them to 40
HP at 7600 rpm.
I'm not in the market for this, but I noticed in the FAQ
that they don't have a pressure feed oil system. Instead, they use roller
bearings, and 50:1 pre-mix. That would sure save some weight, and
complexity. Has that ever been done on other rotary engines?
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