Mintor Here.....

[Morten Laugesen]

Hi,

To whom it might interest.

I have been running my Mintor 3M-170 for around 10 liters of fuel now in the Rhapsody, and finally
it seems to be adjusted properly... Initially I had a lot of trouble getting it adjusted and I guess
I had around 15 dead-sticks (!!!) before it ran right. From my experience with the 3M-170 you really
cannot adjust it to run right on the ground, you need to fly it in order to find out if the settings
work. The OS-140RX on the other hand is a fit and forget engine from day one...

I started running two OS#F plugs and 10% nitro fuel, but that was not working properly. Then I did
as described in the instructions and ran two OS A5 plugs and 15% nitro fuel. This was DEFFINETELY
NOT an improvement; it was very rich in the idle and midrange, but lean on the top end. Then I
replaced the rear plug with an OS#F plug, and this really transformed the engine. Now the idle and
mid-range were much better, and the high-end could be richened as it should be. Finally I opened up
some more air-exit holes in the cowling, and now everything seems dandy!

I initially ran an APC 16.5x12W prop, but it was rather noisy in the air since the ground RPM were
around 8700. I guess it was above 9000RPM in the air, unloading... This Sunday I installed an APC
17x13 standard prop instead and this made the RPM drop to 7800-7900 on the ground. Now the sound in
the air is much more pleasant. Power is MUCH improved over the OS-140RX, and it seems to be a fine
engine once you get it adjusted properly.

My set-up is:

    Mintor 3M-170 with uncut Mintor header
    OS A5 plug front
    OS #F plug rear
    15% nitro, 15% Aerosynth 2 synth. oil
    The new high volume Greve pipe @ 73cm from exhaust flange to first baffle
    APC 17x13 prop (standard NOT narrow blade)
    RPM: 7800-7900

Best regards,
Morten Laugesen

e-mail: morten at laugesen.nu
URL:   http://www.morten.laugesen.nu

----- Original Message ----- 
From: "Bill Carpenter" <bcarpenter at greenvilleisp.net>
To: <discussion at nsrca.org>
Sent: Tuesday, June 24, 2003 9:38 PM
Subject: Re: Mintor Here.....


> Wayne,
>
> I don't know what current thinking is regarding idle bars, but way back when
> we abandoned using them because of the possibility that if one of them came
> off the glow plug it would do damage to the engine.  I've seen what has
> happened to an engine when some bearing balls got loose inside during a run.
>
> I could be wrong, but it sounds like cheap insurance to avoid them, even if
> there is a cost in performance.
>
> Bill
>
> ----------
> >From: "wgalligan" <wgalligan at cnbcom.net>
> >To: <discussion at nsrca.org>
> >Subject: Re: re: Mintor Here.....
> >Date: Tue, Jun 24, 2003, 12:26 PM
> >
>
> > I am breaking my Mintor 1.70 in on 2- Fox long w/idler bars.  Seems to be
> > working just fine so far.  I'll keep you posted as it breaks in some more.
> > BTW this is on the bench not in the air.
> >
> > Wayne G.
> >
> > ----- Original Message -----
> > From: "V Bortone" <vbortone at comcast.net>
> > To: <discussion at nsrca.org>
> > Cc: <discussion at nsrca.org>
> > Sent: Tuesday, June 24, 2003 11:13 AM
> > Subject: Re: re: Mintor Here.....
> >
> >
> >> OK.  Looks that figures are close.  Mine runs about 8,200 rpm also for
> >> real setting.  If I peak engine on ground it will give a little over
> >> 8,300 rpm.  However, I have to back up to around 8,200 rpm since the
> >> engine will be too lean in the air.
> >>
> >> I think you can save some money using K&B 1L plugs.  Don't ask me why
> >> but I see same performance than using OS F and/or A5 combinations.
> >>
> >> Thanks,
> >>
> >> Vicente
> >>
> >>
> >>
> >> ----- Original Message -----
> >> From: Jon Uhler <juhler at bellsouth.net>
> >> Date: Tuesday, June 24, 2003 10:34 am
> >> Subject: re: Mintor Here.....
> >>
> >> > Vicente
> >> >
> >> > I am using the 17x10N as well.  I have a couple 17x12 N's that I
> >> > plan on trying out, needed to get a new spinner first (Thanks
> >> > Terry T. - just got back from vacation - check is OTW).
> >> >
> >> > So far I really love the 17x10N, but it rips every once and a
> >> > while so I plan on trying the 12.
> >> >
> >> > This by far is the best engine that I have ever owned.  I am using
> >> > the standard header with a Greive's pipe.  The header is un-cut.
> >> > I am running Coolpower 15 % and still running it pretty rich.  I
> >> > have a OS 8 and OS F plugs in the motor.  I am getting around 8200
> >> > RPM's.
> >> > Jon
> >> >
> >> > =====================================
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> >> > #
> >> >
> >> >
> >>
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> >>
> >>
> >
> >
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