Webra 160 XP

[Amram Privat]

Hello Ed.
This is a great help. I am not a Webra Guru at all. In fact, if I go for it
it will be my first expiriance with Webra.
I don't know - I will have to reconsider the Webra. Maybe OS140RX or back to
YS140L
Thanks
Amram


----- Original Message ----- 
From: "Ed Alt" <Ed_Alt at hotmail.com>
To: "Amram Privat" <amram at leshed.com>; <discussion at nsrca.org>
Sent: Monday, October 11, 2004 1:11 PM
Subject: Re: Webra 160 XP


> Amram:
> The Webra 1.60 seems to do a poor job of transferring heat to the fins and
> head.  I learned that the Webra 1.60 really needs attention to ducting
> plenty of air to keep the bottom of the engine cool.  I had problems with
> the main bearing loosening up and allowing the crankshaft to shift
backwards
> enough to cause the prop thrust washer to dig into the crankcase.  This
> happened twice on two almost new engines.  I also had problems with the
pump
> going flakey, also most likely attributable to excessive heat buildup.
The
> other thing is that it is somewhat touchy to adjust.  It runs wonderful
when
> everything is just right.  However, you get it right for one temperature,
> humidity and field elevation and it completely changes on a different day
or
> location.  Some change is expected, but you have to really learn what the
> engine wants if you plan to be able to fly it competetively.
>
> Some guys have great luck with the engine.  Locally, one top flyer has
been
> getting better results after switching to the VP30 pump with his Webra.
The
> best I can say for it as a competition motor is that it is delicate.  I
just
> got tired of fussing with the engine all the time, figuring it would be
> better to be able to concentrate on flying instead of being a mechanic all
> the time.
>
> Unless you are already at Webra guru status or have a local Webra guru to
> commiserate with, I would suggest looking into an OS 1.40 RX or OS 1.60 FX
> instead.  Since I could not locate a 1.40 at the time, I dropped the OS
1.60
> FX  with a VP30 pump in to replace my Webra in mid season and have had no
> problems whatsoever.  I quickly got over the fact that it's side exhaust
and
> that it is a few ounces heavier.  The wrap around header is no big deal.
> You can get one custom made from Karl Mueller or else you can buy a Hatori
> header.  The Mueller headers are very nice.  You should plan on replacing
> the main bearing with a stainless steel version.  If you stick with the
> Webra, there are now SS bearings available for them too.
>
> BTW, the Webra 1.45 that I owned and flew in the same airplane during the
> frequent 1.60 downtimes never had a problem with the main bearing shifting
> around.  I accumulated about twice as much flight time on the 1.45, but it
> had all the other issues that the 1.60 had, i.e., being touchy, having
pump
> problems etc.  I hope this helps.
>
> Ed
>
>
>
> ----- Original Message ----- 
> From: "Amram Privat" <amram at leshed.com>
> To: <discussion at nsrca.org>
> Sent: Monday, October 11, 2004 3:40 AM
> Subject: Webra 160 XP
>
>
> > Hello
> > I am about to order the Onyx140 (Protech) and my plan is to use Webra
160
> > XP.
> > Any tips ideas or recommendations as to the Webra 160 XP will be highly
> > appreciated.
> > Thanks
> > Amram Leshed.
> > http://www.f3a-israel.com
> >
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