O.S. pattern motors

[flyintexan at houston.rr.com]

Ditto.

OS160fx+17x12apc+hatori header+greve pipe+perry pump = tons of power.  My YS flying buddy hates it when I start it with ONE spin backwards on the spinner...so simple.  Rear bearing replacement is easy and predictable.


-mark

p.s. thanks again to Bob Pastorello for posting the bearing change procedure..

----- Original Message -----
From: JonLowe at aol.com
Date: Thursday, September 9, 2004 9:16 am
Subject: Re: O.S. pattern motors

> John,
> I am a newbie to pattern, and have no one nearby to lean on for 
> advice.  After viewing various options, I went with the OS 1.60, 
> using the info from Bob Pastorello's site, www.rcaerobats.net.  I 
> am using the 1.60, with the replacement stainless sealed bearing 
> from Boca, Mueller header, Perry pump, and a Greve pipe, swinging 
> a 17x13 APC.  This is about as dependable engine setup as I've 
> ever seen for any airplane.  It likes to be started upright the 
> first time of the day, but after that, it starts easily by bumping 
> it backwards against compression.  I took some weight out by using 
> a lightened backplate TruTurn spinner, and got a Grade 5 prop nut 
> at Lowe's, and used the Dave Brown short spinner propwasher and 
> adapter as a jamb nut, rather than the heavy OS/TruTurn 
> components. The crankcase pressure nipple comes from the FI .160, 
> and I just drilled thru the upper left rear backplate hole.  I'm 
> running 15% MACH 7 syn/castor fuel(Morgan fuels).  I'm currently 
> using an A5 OS plug, although I've also used the OS #8.
> 
> I will probably go with the Aeroslave CF pipe in the future as it 
> is lighter and shorter than the Greve's pipe; it wasn't available 
> when I started.
> 
> The ONLY issue I've found is that it sometimes likes to blow the 
> seals out of the plugs, even after I added an additional head 
> gasket.  I beleive this was caused by using my gorilla starter 
> when the engine was warm, and a minor hydro lock, as the plugs 
> aren't blown out when I land.  I haven't had a problem since I 
> went to flipping it backwards after the first start of the day.
> 
> Hope this helps.
> 
> Jon Lowe
> 
> In a message dated 9/8/2004 11:14:23 PM Eastern Daylight Time, 
> "John Pavlick" <jpavlick at idseng.com> writes:
> 
> >Guys,
> > I'm looking for some insight into which motor I should use in a 
> new ship
> >(Focus). I like the O.S. 1.40RX because it's got a rear exhaust, 
> but the
> >1.60FX looks nice too. If anyone has any experience with either 
> of these
> >motors (props, fuel, pumps, things that wear out, etc.) I'd 
> appreciate their
> >input. Either one is a bit of an investment so I want to make 
> sure I'm
> >making the right choice. Also if anyone has used any of the new 
> Hyde mounts
> >(with the nose ring attached to the mount) I'd be interested in 
> hearing>about that too.
> >
> >John Pavlick
> >http://www.idseng.com
> >
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