OS 140 RX with Dual Plug Conversion

[s.vannostrand at kodak.com]

Did you know that OS has a dual plug head that they sell in Japan?

It appears from the pictures on these two sites that the 3M140 engine was 
designed with a head bolt pattern that matches the OS140.  Is this 
correct?

Bully has had dual plug heads for years to put on Webra 145s.  Funny how 
things come around. 

Truth is, it seems to really help.  My experience with the Bullys has been 
good and the OS140 I saw with the dual plugs had an idle much lower than 
normal (around 1300 rpm).

--Lance





"Bob" <lomcevak at tin.it>
Sent by: discussion-request at nsrca.org
09/17/2002 12:14 PM
Please respond to discussion

 
        To:     <discussion at nsrca.org>, "pattern at rcmailinglists. com" 
<pattern at rcmailinglists.com>
        cc:     <lee at piedmontmodels.com>
        Subject:        Re: OS 140 RX with Dual Plug Conversion


The website of their producer is:

http://www.mintor3m.it/

I've got this engine and I can say it is very good.

See you at the TOC.

Roberto Bracchi
www.modelcompositi.com


----- Original Message -----
From: "Chuck Wagoner" <chuckwagon at charter.net>
To: "pattern at rcmailinglists. com" <pattern at rcmailinglists.com>;
"discussion at nsrca. org" <discussion at nsrca.org>
Cc: <lee at piedmontmodels.com>
Sent: Tuesday, September 17, 2002 6:41 PM
Subject: OS 140 RX with Dual Plug Conversion plus Webra Memories


> Dual plugs
> anyone?http://www.rcaerosport.com/articles/reviews/evolis/crino/e10.htm
(I
> remember my very smooth running dual-plug Merco 60.)
>
> Also another 2-stroke memory... the great Webra slide valve carb. Mine
> seemed to give INSTANT RPM up from an all-day idle with my stock single
plug
> Webra black head engine! It had almost zero spool-up or spool-down time 
to
> or from any level(s) I chose. Blip...blip...blip <happy smile>. Once I
made
> an adaptor and tried the slide valve with a ST blue head. Same dynamics.
> Also gave more HP than the stock ST carb. Just some thoughts.
> Chuck
>

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