Lunch time with the 1.70

Thu May 15 11:09:07 AKDT 2003

Great to see your experience Eric.  I get nearly identical results on mine,
using 17 x 12 apc, two OSA5 plugs, Cool Power 15%, Mintor carbon fiber pipe.
I cut the header 1.0" short, and get just a bit more rpm set for launch.
Jim W.

From: Henderson,Eric [mailto:Eric.Henderson at gartner.com] 
Sent: Thursday, May 15, 2003 12:03 PM
To: discussion at nsrca.org
Subject: Lunch time with the 1.70

the forecast was rain and windy the reality was a brief sprinkle and a
gentle east wind.. One long lunch later, seven serious flights and I shall
claim that the 3M 1.70 Mintor is broken in. 

I switched to 15/16 and flew twice with the 16" prop. Then with the 17 x 12
APC. The engine ran a whole tank at full rpm on the ground at a very steady
8,010 rpm. and head temp around 90-100F.

The we beastie has a bit of poke to say the least. On verticals you could
use full power but you are advised to back-off on the 45 degree lines for
fear of overshooting your destination. The diamond loop size is your choice
with this prop and motor. Dare I say DZ'esque! of OS'esque!

Now we have OS 1.40's (EFI and RX's), YS 1.40's Webra 1.45's, OS 1.60's (FX
and FI), Soon to come WEBRA 1.60's, Mintor 1.40's and 1.70's etc all to
chose from depending upon taste, service needs and plane weights... Isn't
great to have all of these choices, of course unless you are indecisive!!!!!

Regards,

Eric.

> To: discussion at nsrca.org
> Subject: Re: MINTOR testing continued
>  
> Eric, Is a "Mintor" a new motor?  Where are they advertised? ----- Ron 
> "Henderson,Eric" wrote: 
>   I flew the Hydeout-1.70 - Mintor at lunch today and emptied another
> gallon through the exhaust pipe.The F plugs are still there and clean.
> Each flight allowed me to click in a little to the current setting of
> 1.5 turns out on main needle. The Idle  screw is still set fat and will
> stay there unless it complains.The 16 x 12 is spinning just nicely and
> will be swapped for the 17 x 12 tomorrow. the fuel will be changed to
> 15/16 first and then the prop if all goes well.I felt confident enough
> to fly the FAI P-03 several times in about a 15 mph headwind. ( I said
> confident not competent - BBG)The engine pulled the plane around very
> well indeed. Not quite 17 x 13 OS 1.60 grunt yet but better than the L
> that was in there before. The hourglass downwind push and 45 climb was
> easy. The fig 9 with three 1/2's going up maintained speed and roll
> rates, which told me it was not slowing down much. the spin entry was
> easy so the idle was normal. Transitions were smooth on the last two
> flights. They gurgled before,after long down lines, but never even
> sounded like it would quit.Definitely getting to a competitive
> performance.One interesting thing is that the std ES clone of the OS
> pipe has the first baffle 2" further back than the Bolly pipe. This
> means that I am running 2" longer than a Bolly. I intent to try the
> bolly when the 1.70 is broken in and can handle a shorter pipe. Should
> be interesting to see what it performs like. In the meanwhile not
> quoting rpm's etc. just how it goes up, transitions and idles.One funny
> note is that although it advises running FAI fuel at the end of the day
> it will hardly run on it... any thoughts on the straight fuel...Eric.
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