Mintor 170 testing.update

[Koenig, Tom]

David,

I couldn't tell you yet... but I'll ask the lads, I certainly didn't hear
them whinge about it!!!.  It is more, but how much I dont know. I dont think
its anymore than the DZ. Next weekend they should have them broken in a bit
more. It would be fairer then to get some fuel consumption numbers

They do have some figures ( props) etc sofar. I'll ask them first wether it
is OK to send it to the list.

Tom
> ----------
> From: 	David Flynt[SMTP:davidflynt at earthlink.net]
> Reply To: 	discussion at nsrca.org
> Sent: 	Tuesday, 1 April 2003 13:38
> To: 	discussion at nsrca.org
> Subject: 	RE: Mintor 170 testing.update
> 
> Tom,
> 
> Any data on fuel consumption for the 170?
> 
> David
> 
> -----Original Message-----
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org]On Behalf Of Koenig, Tom
> Sent: Monday, March 31, 2003 6:55 PM
> To: 'discussion at nsrca.org'
> Subject: RE: Mintor 170 testing.update
> 
> 
> 
> I have also just witnessed ( and flown) two Mintor 170 engines this past
> weekend, both of which belong to some flying buddies of mine.
> 
> I must say..once you get past the 'tightness' as Lance describes and a few
> other gremlins that my buddies experienced, the engines do have awesome
> potential. It does not seem to turn huge Rpms, but boy this thing loves a
> big stick and it does not slow down at all.
> I'm a Ys man of many years and I love my DZ, this is the first engine
> which
> could make me consider a two stroker. There is no substitute for cubes!
> Sofar I still think the DZ outguns it in the mid-range, that may change as
> they run those beasts in, but otherwise I'd say this thing will take on
> the
> Dz'ds easily. I guess the goal posts keep moving.
> 
> I'll keep playing with my Ys's but I doubt the 170 will remain a secret
> for
> very long. Hopefully it proves to be reliable.
> 
> Tom
> 
> -----Original Message-----
> From: s.vannostrand at kodak.com [mailto:s.vannostrand at kodak.com]
> Sent: Sunday, 30 March 2003 4:07 AM
> To: discussion at nsrca.org
> Subject: Mintor 170 testing.update
> 
> 
> Every moving part is tight initially.  I hope that means long life after
> full break in.  This engine is not one of those "run a 1/2 tank through it
> and go fly" engines.  It's more like the Saito 180 or a YS120SC.  You have
> to take some break in care.  My breakin procedure seems to take a little
> longer than some others, so take my experience with a grain of salt.  I'm
> breaking in engine #2 now.  It started running pretty normally (able to
> use
> the entire throttle range at one needle setting) after 1/2 gallon and it
> ran pretty well after the full gallon.  I like to give it 4-5 cooling
> cycles during the first gallon and leave the needle rich, with short
> bursts
> of more lean settings.  All starts are hand starts so far.
>     During gallon #2 today I started changing the pipe tuning length using
> the standard Mintor CF pipe.  This pipe is a lot shorter than others (only
> about 22 inches long) so it's easier to install.  I also switched from 10%
> Magnum to 15% Magnum fuel.  I haven't changed the prop from the 17x12N
> APC.
> So as you can see, I changed too many variables to be able to understand
> the effect of each one.  In addition, the engine is still breaking in and
> improving naturally.  However, the results are exciting.
>    At the end of gallon #1 (10% nitro): 7900 rpm  standard pipe setup
>   Beginning of gallon #2 (15% nitro): 8200 rpm
>   Shortening pipe 3 inches (!! this is a lot, but the rpm's kept going up
> each test!!): 8500 rpm
> 
> Mind you, it is still running rich and the rpms can be noticeably peaked
> with the needle, but I didn't tach it at peak.
> 
> --Lance
> 
> 
> 
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