ORIGINAL: nmking09
A reason 4 strokes are better for 3-D
But that means that you need to spin the 13 inch prop at about 15,000 rpm. The problem with the two stroke is that because it produces less torque it will take it longer to reach 15,000 rpm. Than it would for the 4-stroke to reach 10,000 with their respective props. This means that even if you could get 15,000 rpm from the two stroke, unlikely, the throttle response ( which is very important during hover) would be slower than the 4-stroke. This is why 3-D fliers have gravitated toward 4-strokes.
Oh and one more thing. I would put my UCD with a lowly 70 surpass against your 2-stroke any day. And I would win. Not just because I have physics on my side but because mine is better.
Nmking09
nmking09
Thanks for the entertaining writing however; it is an opinion and not fact. I find it insulting that you would call me and anyone else a liar, stating that we were incorrect in our post of 15000 rpm. Maybe in your corner of the world two stroke engines cannot reach such speeds, but on this side of the Mississippi, they reach those speeds and do it quite often. You also stated, “This is why 3-D fliers have gravitated toward 4-strokes” yet again another opinion.
“Oh and one more thing. I would put my UCD with a lowly 70 surpass against your 2-stroke any day. And I would win. Not just because I have physics on my side but because mine is better.”
Yes, you are right, yours is better, that is why O.S. keeps producing two stroke engines and making a profit, because your “lowly” four stroke is better.
I care not to challenge you my friend, but any time you would like to fly with us, you are certainly welcome even with your “lowly” four stroke.
The beauty of this country and this sport is that we have choices. Everything has its pros and cons sir, everything!