Webra 160; was: Mintor 1.70

Tue Aug 12 08:38:37 AKDT 2003

 Thanks E. if you get the results on the DZ on a 17x12 sometime in the future please let us know. I agree with the spooling up on the 2c. I think that from my assesment that for raw power the DZ's seem to have an edge but when you add in all the factors like fuel costs, engine costs, ease of maintenence ie. simplicity, and reliability the available 2 strokes are a very good choice. Mike

"Henderson,Eric" <Eric.Henderson at gartner.com> wrote:I only tach'd the YS1.40 DZ with a 16 x 12W and got a solid 8,800 rpm. I was running 30% Powermaster DZ fuel. It pulled the Hydeout out of sight on 3/4 throttle.

Still testing the Mintor 1.70 in the same ship. Running an APC 17 x 12 with 10/16 Powermaster. 15 Runs so far. Does P-03 and P-05. It s not the same power as a 4-c and you spool up a bit more in the bottom corners. Prefer the 17 x 13 for noise and will wait a while before I load up the engine.

E..

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of mike mueller
Sent: Tuesday, August 12, 2003 11:37 AM
To: discussion at nsrca.org
Subject: RE: Webra 160; was: Mintor 1.70

 Just for comparisons sake what type of RPM would you expect out of a YS DZ with the same prop on say Magnum 1.5? 

"Henderson,Eric" <Eric.Henderson at gartner.com> wrote: You'll need more nitro in cooler weather  :-)   - But what is cooler weather to the CA crowd?

--
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Wayne Galligan
Sent: Tuesday, August 12, 2003 10:06 AM
To: discussion at nsrca.org
Subject: Re: Webra 160; was: Mintor 1.70

Jerry, 

I was pleasantly surprised too.   I can only imagine what this engine will perform like in cooler weather.  We have also been surprised that these numbers are coming from 10% Magnum fuel.  Now its just a matter of getting it my plane and trying different props.
I failed to note that I am using 2 - A5 plugs.

Wayne G.
----- Original Message ----- 
From: Jerry Budd 
To: discussion at nsrca.org 
Sent: Monday, August 11, 2003 10:47 PM
Subject: Webra 160; was: Mintor 1.70

That's pretty good, the best numbers I've heard yet for a 3M-170.

For comparison my Webra 160 turned the APC 17x12 at 8500 rpm at the 
Fresno Contest in June and then again in 104 degree heat at Riverside 
on the 4th of July.  That's not peak rpm but the flight setting which 
was a bit rich (new motor and all).  Magnum #1, YS plug, ES-2C140L90 
pipe set at 23-1/4" baffle to plug, stock 1.75" rise Mac's header, MC 
carb.  The motor is timed so that it doesn't come onto the pipe at 
all (i.e., NO pipe jump), and the throttle response is linear from 
idle to full power.  It's also ultra quiet on the ground (under 92 db 
at the Nats) and in the air.

Tony Frackowiak's running the same setup in an Alliance on Magnum 15% 
fuel and turning 8200-8400 (again set a bit rich).

I can't imagine what else anyone would want out of a motor.  It's 
essentially perfect.

Jerry

>My 1.70 hit 8200 rpm with 10% magnum, APC 17X12 regular, at the 
>Lubbock contest. It was hot and high, reports were that it was like 
>being at 7200 ft.
>
>
>
>Gray Fowler
>Principal Chemical Engineer
>Composites Engineering
>
><rcaerobob at cox.net>
>Sent by: discussion-request at nsrca.org
>
>08/11/2003 10:49 AM
>Please respond to discussion
>        
>         To:        discussion at nsrca.org
>         cc:        
>         Subject:        Re: Mintor 1.70
>
>
>
>HO-LY-COW !  That's a pretty beefy setup, for sure.  10% Nitro? 
> You're kiddin', right??
>
>Bob P.
>>
>>  From: "Wayne Galligan" <wgalligan at goodsonacura.com>
>>  Date: 2003/08/11 Mon AM 11:27:50 EDT
>>  To: <discussion at nsrca.org>
>>  Subject: Mintor 1.70
>>
>>  Just a few notes on my initial test and break-in on this engine. 
>> It has not been installed in my plane as of this writing but I 
>>cant wait.
>>
>>  3M 1.70 stock header
>>  10 % Magnum fuel
>>  Bluebird c.f. 2-stroke pipe  24.25" center of head to 1st baffle. 
>> Total length of exhaust center of head to end of pipe  31.5"
>>
>>  Test day 98 degrees and about 35%+ humidity
>>
>>  17x12N APC      high 8500rpm low 1600rpm
>>  17x13 std APC   high 8250rpm  low 1500rpm
>>
>>  This is after 5) 16oz tanks of breakin.  I broke it in just like 
>>the OS,  alternating rich to lean during first several tanks.
>>
>>  Wayne Galligan
>>
>>
>
>Bob Pastorello, El Reno, OK, USA
>rcaerobob at cox.net
>www.rcaerobats.net
>Just a few notes on my initial test and break-in on this engine.  It 
>has not been installed in my plane as of this writing but I cant 
>wait.
>
>3M 1.70 stock header
>10 % Magnum fuel
>Bluebird c.f. 2-stroke pipe  24.25" center of head to 1st baffle. 
> Total length of exhaust center of head to end of pipe  31.5"
>
>Test day 98 degrees and about 35%+ humidity
>
>17x12N APC      high 8500rpm low 1600rpm
>17x13 std APC   high 8250rpm  low 1500rpm
>
>This is after 5) 16oz tanks of breakin.  I broke it in just like the 
>OS,  alternating rich to lean during first several tanks.
>
>Wayne Galligan

-- 
___________
Jerry Budd
mailto:jbudd at qnet.com
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