Gasser - Was "OS Piston Pin"

[V Bortone]

That is exactly right.  1.8 cu.in gas engine withing 30-35 oz will be a 
hit.

vicente bortone


----- Original Message -----
From: Bob Pastorello <rcaerobob at cox.net>
Date: Saturday, July 5, 2003 8:26 am
Subject: Re: Gasser - Was "OS Piston Pin"

> YES !!  Having Been there, Done that...and NOW converting my gas 
> pattern to
> a glow, I can attest to the weight, vibration, and noise issue.
>    The MVVS 1.6 gasser is as close as there is right now.  And 
> it's not
> quite as powerful as the old YS 1.20 Std., but close.  Just fine 
> for a 9 lb
> airframe....but...5kg, 2M, higher-drag ships, well, the manufacturers
> haven't addressed it-yet...
>    The motor itself is getting close; BME and DA both have (or 
> are soon to
> have) 50cc motors in the 2.4 lb range.  But that's TOO MUCH 
> power/prop.    A very fine solution would be a 1.8 cu in, in a 
> conventional glow-type
> crankcase, with VERY lightweight ignition....THEN we'd have 
> something....
> Bob Pastorello, Oklahoma
> NSRCA 199, IMAC 1320, AMA 46373
> rcaerobob at cox.net
> www.rcaerobats.net
> 
> 
> ----- Original Message ----- 
> From: <VicenteRC at aol.com>
> To: <discussion at nsrca.org>
> Sent: Saturday, July 05, 2003 8:03 AM
> Subject: Re: OS Piston Pin
> 
> 
> > Jim:
> >
> > The problem with gasoline engines is that in the range size and 
> power of
> the OS 140 or similar, the gasoline engine weight between 1 lb and 
> 1.5 lb
> more.  It will be nice that the manufacturers go back to drawing 
> board and
> produce a very light gasoline that could be used pattern.
> >
> > Regards,
> >
> > Vicente Bortone
> >
> >
> >
> >
> >
> > In a message dated 7/4/2003 1:00:53 PM Eastern Standard Time,
> JOddino at socal.rr.com writes:
> >
> > >
> > >
> > > You folks are sure making a case for gas engines with enough
> displacement to
> > > get the job done.  My DA50 is barely broken in at 100 flights. 
> I
> recently
> > > got an e-mail from a guy who put one in a Gator Giles 202.  It 
> went to
> 14
> > > pounds but I bet it does exactly what pattern pilots are 
> looking for.
> Super
> > > thrust and good braking.  Get rid of the weight limit and 
> you'd see
> whole
> > > new breed of two meter pattern planes.
> > > My 202 with the OS 1.40 EFI is sitting collecting dust since 
> the bearing
> > > went out at, you got it, 100 flights.  I'd rather fly than rebuild
> engines.
> > > Jim
> > > ----- Original Message ----- 
> > > From: <flyboy422 at juno.com>
> > > To: <discussion at nsrca.org>
> > > Sent: Friday, July 04, 2003 9:09 AM
> > > Subject: Re: OS Piston Pin
> > >
> > >
> > > > Verne,
> > > >
> > > >      If you can stand one more take on the OS piston I'll 
> share my
> > > > experience.  I have been flying OS 140's for 3 years which 
> means I
> have
> > > > been changing bearings at least twice a year.  Everything 
> that has
> been
> > > > written on the list regarding the wrist pin is correct.  The 
> method I
> use
> > > > for the bearing is as follows:  Perheat your oven to 500 
> degrees.Clean
> > > > as much fuel off the case as you can.  Put the case in the 
> oven for 30
> > > > minutes.  When you open the oven door, the bearing will be 
> out of the
> > > > case.  If  you are not this lucky, it will only take a 
> slight rap to
> > > > finish the job.  Put the new bearing(stainless) in the 
> freezer for the
> > > > same 30 minutes.  I remove any shields from the bearing.  
> They only
> will
> > > > restrict lubrication.  Put the bearing onto the crankshaft 
> and insert
> > > > into the case.  I know you'll know what to do next.
> > > >
> > > >        I suggest you use only stainless bearings and expect 
> to get
> about
> > > > 100 runs out of it.  The early warning sign of wear will be 
> a slight
> > > > rocking of the prop when the engine is hot.    Once that 
> starts you
> have
> > > > about 10 flights left.  I use after run oil religiously.
> > > Good luck and
> > > > I'll see you at the Nats.
> > > >
> > > > Steve Miller
> > > > =====================================
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