Mintor eyes only/Power wish list

[Anthony Abdullah]

I am eagerly watching the posts on engines and am very excited about the choices available. I must say that it says an awful lot about the YS140 DZ 4 stroke that it is even in the same power range or even superior to a significantly larger 2 stroke. I remember back in the day that a plane that would fly on a 60 two stroke needed at least a 90 to 120 four stroke to fly. Boy have things changed. I am still sitting on my wallet with my fingers crossed hoping that YS will introduce a 140 or 160 AR two stroke. Black machined finned head and all. It will be reliable, run with the currently available ES and other pipes, Idle smoothly, snap transition with no mixture change at mid range, spin a 17x12 at 8400 RPMs with a flat torque curve, have a totally linear throttle curve, and sealed bearings. All for around 4 bills. 
 
Then I woke up.  

"Henderson,Eric" <Eric.Henderson at gartner.com> wrote:
In case you have had enough of this topic just hit CRTL-D

If you have not had enough, here is today's lunch results.

It was warm and muggy today after all of the rain. The Mintor had the "target" 17 x 13 APC strapped on the front. With three gallons through the engine it was time to really see what the 1.70 was made of! Engine was set at 7,900 rpm on the ground using Powermaster 15/16. The Hydeout was ready for the ride. 

Here's how it flew P-03, or at least a description of a few of the maneuvers as I saw them unfold.

Sq. loop on corner - Straight and level into the 45 climb at 1/3 throttle. Nice even pull. Increase power around the first corner to 3/4. Perform 1/2 roll and got on to full power (WOT). Plane continues on at slightly increased and smooth speed with the real need to back of the gas over the top corner. Long down line 45's and the engine responds smoothly on the bottom pullout to level. No gurgle. Upon reflection it was a big loop before I noticed.

Hour glass - very similar with a lot of grunt on the up 45 line.

All vertical lines were easy with a big punch over the top of maneuvers such as Humpty-bumps. The down lines were flown very long to look at speed etc. The idle can be set low and it does not quit. This helped the down lines and allowed pull-outs that did not bend the wing tubes. The idle for spin entry was actually too low and a purr had to be added to both reach the middle and get the nose up.

The big test was the figure-9 with 3 x 1/2 rolls going up. An entry at 1/4 throttle as I pushed followed by a incrementing amount of throttle as each 1/2 roll was executed ending in full throttle over the top of the 9. This was a big 9. Too big for good points but just right for free adrenaline shots!

So how does it (1.70) compare with the OS 1.60. About 200 rpm less on the ground but 4.0 oz lighter. Vertical behavior very similar between equal weighted planes.

So how about the DZ. In the same plane it was clear that the DZ had the edge in the mid range grunt-dept. Vertical snap rolls were equal however in vertical line recovery.

In the end it comes down to probably five things. Price, Serviceability, Reliability, weight and price. Depending upon what you need you can chose the performance of a 2-c or a 4-c the personal taste of sound and throttle timing.

I would run all three for equal fun, but as far as price goes, (The OS in this case is an FI), the Mintor has a big edge.

Regards,

Eric.




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