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- Newsgroups: rec.models.rc
- Path: sparky!uunet!stanford.edu!nntp.Stanford.EDU!fwing
- From: fwing@leland.Stanford.EDU (Stephen James Morris)
- Subject: Re: extensions from engine to propeller?
- Message-ID: <1992Dec15.055839.3424@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (USENET News System)
- Organization: DSG, Stanford University, CA 94305, USA
- References: <1992Dec14.213608.19647@gn.ecn.purdue.edu> <24436@hacgate.SCG.HAC.COM>
- Date: Tue, 15 Dec 92 05:58:39 GMT
- Lines: 19
-
- Shaft extensions
- >I would like peoples opinions and experiences on using a shaft
- >to move the propeller farther in front of the engine (instead of
- >'directly' in front of it). I curious about problems this leads to
- >also.
-
- About 10 years ago I built a mid-engine canard design that used a .40
- size engine. The motor was 18" behind the propellor and the two were
- connected with a drive shaft running in ball bearings and a model boat
- universal joint at the engine shaft. This system works fine providing
- everything runs true. I used a 0.25" steel rod for the drive shaft.
- Care must be taken to avoid 'shaft whirl' which can occur with long
- floppy shafts that are not correctly supported.
-
- Steve Morris
- Stanford, CA
-
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