New Mintors

[Tom Buyrc]

Great answer Eric, the increased methanol actually does the cooling.

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of Henderson,Eric
Sent: Tuesday, May 13, 2003 8:11 AM
To: discussion at nsrca.org
Subject: RE: New Mintors

Ahhh! the wonders (or secrets) of engine behavior. Oil lubricates and
reduces friction to a point. But when included in the fuel itself it
does not necessarily cool. More fuel will cool.

The OS 1.40 runs so well on Coolpower because it has 17% oil. Higher oil
contents makes you turn the needle in to get more power and then edges
you towards "too lean" and the dreaded heat barrier. Less oil gives you
cleaner burn with the more volume of methanol and nitro present. The
heat is not removed by the excess oil. It does not burn nor does it give
any power.

Eric.



-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of patterndude at attbi.com
Sent: Tuesday, May 13, 2003 10:56 AM
To: discussion at nsrca.org
Subject: RE: New Mintors


Tom,
How's that again?  Use less oil and the engine runs cooler with more
power??  
How can that be?
--Lance
> The Mintor factory says don't use MORE than 18% oil. I have talked
with
> them and they say running 16% oil will give you more power and the
> engine will run cooler. I think it is best to break in with 18% oil.
> 
> Tom Collins
> BuyRC.com 
> 
> -----Original Message-----
> From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]
> On Behalf Of patterndude at attbi.com
> Sent: Monday, May 12, 2003 1:34 PM
> To: discussion at nsrca.org
> Subject: RE: New Mintors
> 
> Eric,
> The manufacturer specs call for 18% oil in the fuel, as do most
> manufacturers.  
> Going with 16% may not be necessary.  You already have the strongest
> engine 
> around.
>   I haven't seen anyone post much more info than I posted originally.
> Jim W 
> has a reliable setup, it sounds, and he's happy with the power, but my
> setup is 
> getting a little more.  I have the Mintor carbon pipe and the Mintor
> header cut 
> 1.5".  A 17x12N turned 8450 at 80 degrees on 10% Magnum fuel on Sunday
> this 
> weekend.  Why run less oil with that kind of power?
> 
> --Lance
> > Lance,
> >        I much prefer to have a tight engine. (Most engines that we
> receive are a 
> > compromise so that the users don't break them). I would suggest that
> the 
> > break-in instructions need to be a bit more comprehensive. The 170
may
> also be 
> > different to the 1.40. (The Moki needed a similar break-in.) BTW it
> was not 
> > cowled in very much. I had removed the top to accommodate the DZ
pump.
> I then 
> > removed most of the front to accommodate the carb. (The Hydeout is
> quite narrow 
> > at the spinner.)
> > 
> > I tried using two different plugs on my modified OS 1.60 and one
> always died. I 
> > will switch to the recommenced A5's when I get a cool run and see
how
> they do.
> > 
> > The vertical was strong even though it was just a 16" prop. It was
> also nice and 
> > quiet. Looking forward to trying some of my 3-blade props later on.
> > 
> > Eric.
> >        
> > 
> > -----Original Message-----
> > From: discussion-request at nsrca.org
> > [mailto:discussion-request at nsrca.org]On Behalf Of
> patterndude at attbi.com
> > Sent: Monday, May 12, 2003 1:11 AM
> > To: discussion at nsrca.org
> > Subject: Re: New Mintors
> > 
> > 
> > Eric,
> > I ran a gallon thru my two on the bench before putting them in the
> air.  There 
> > have been several posts of people putting them up quickly and
they've
> reported 
> > success.  More power to them.  I'm sure there are different break-in

> > procedures that work.
> >   In my case, similar to yours, the engines seemed tight at first.
I
> found 
> > that they ran fine at mid throttle out of the box and the range
> extended with 
> > a little running.  Your procedure sounds like it's working, but I
> agree it may 
> > not be for everyone.
> >   The way I've always looked at it, break-in is a temporary
condition.
> No 
> > need to rush it.  I have a friend with a Saito 180 which took a
while
> to break 
> > in but then became a very reliable engine.  I'm not trying to
> associate one 
> > engine with another, just pointing out that reliable engines result
> from a 
> > variety of starting points. 
> >   Thanks for sharing your experiences.  
> > --Lance
> 
> > > Partially broke-in my Mintor in today with help from Dave
Lockhart.
> Initially 
> > > the engine was very tight and got hot very quickly. 
> > >  
> > > I switched to two F plugs and used sport 2-c 15% with 18% oil.
Still
> tight and 
> > > hard to keep running without overheating. Finally I got a run with
a
> high idle 
> > > that did not overheat. Then Dave persuaded me to go to full
throttle
> and set 
> > it 
> > > rich. It worked much better this time. A tank later we put it in
the
> air. It 
> > ran 
> > > very rich in the air. Several landings later ... with Dave turning
> in the 
> > needle 
> > > a click or two at a time.. we got a flight where we could lean it
by
> climbing 
> > > and cool  down by diving. Round and square loops did the job.
> Another run on 
> > the 
> > > ground and a slightly leaner run in the air and it was almost
> running like a 
> > > 2-c.
> > >  
> > > The power on a 16 x 12 APC was encouraging and the idle began to
be
> more 
> > > reliable.. I know the engine was tight before I began but was
> surprised that I 
> > > had to be so diligent with the break-in. My question to you
> experienced 
> > > Mintor-men is. "Is this usual?" Not complaining, but without my
own
> and 
> > David's 
> > > experience a "Rookie" could struggle...
> > >  
> > > Regards,
> > >  
> > > Eric.
> > >  
> > > 
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