remedial engine question

[Anthony Romano]

Hi Lance,
The YS treated me well. After the piston update the engine has been very 
reliable for over three hundred flights. Power is dropping now and it will 
go in for a rebuild this winter.
The trouble I am having is with a brand new RX. Maybe I should have saved up 
my money and bought a 1.70?

Anthony


>From: patterndude at comcast.net
>Reply-To: discussion at nsrca.org
>To: discussion at nsrca.org
>Subject: Re: remedial engine question
>Date: Mon, 25 Aug 2003 18:02:48 +0000
>
>Anthony, didn't give up on the 4 banger already, did you?
>
>--
>District 6 AVP
>www.aeroslave.com
> >
> > After a lot of experience I have concluded that bearing life is highly 
>variable
> > in a stressed environment.  30-200 flights are possible in the same
> > airplane,engine on bearings purchased at the same time.  Factory OS 
>bearings
> > seem to be the worst quality, but there are some that will claim they 
>last
> > forecver.  I am just combining all the input to make a general 
>statement. We
> > can reduce the variability by providing a better operating env.  Our 
>bearings
> > exceed their tolerances at about 250 degrees, which is not that hot, so 
>put a
> > cooling scoop on the front or use cheeck cowls to something to keep air 
>flowing
> > over the bottom of the crank.  Use a low viscosity oil fuel like Magnum 
>or
> > Powermaster special fuel or heli.  Finally, set up fuel delivery to 
>eliminate
> > lean runs toward the end of the tank.  This greatly stresses the engine. 
>  Some
> > top fliers use bladder tank systems.  I just land with 1/3 tank.
> >
> > --Lance
> >
> > --
> > District 6 AVP
> > www.aeroslave.com
> > > Hi all,
> > > Have an RX with about thirty flights. The second day out I noticed a 
>squeak
> > > when turning the prop for restart. Thought something was hitting the
> > > spinner, checked all that and it stopped. Yesterday heard it again and
> > > noticed the bearings feel a little rough. Now hear is the weird part 
>does
> > > this only when hot. When cold feels fine and runs great. I plan on 
>pulling
> > > it apart tonight and changing bearings but pretty disappointed at the 
>short
> > > life.
> > >
> > > Any one have similar experience?
> > >
> > > Anthony
> > >
> > > _________________________________________________________________
> > > Enter for your chance to IM with Bon Jovi, Seal, Bow Wow, or Mary J 
>Blige
> > > using MSN Messenger http://entertainment.msn.com/imastar
> > >
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