Impressive eh? Well not
really, its just a place for some real world data
from our personal experience with our engines.
Disclaimer-
The prop data posted
here is made through highly unscientific means.
The days of testing varied in temperature, humidity and pressure,
and at 4100'
Although checked with 2 different tachs, your mileage may vary.
ASP .80 4c - 15% Wildcat 18% oil 21 .oz with prop
12x8 APC - 9400 rpm
13x8 Scimitar - 9200 rpm
14x6 Master Airscrew - 8700 rpm
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Super Tigre G90 - Powermaster YS 20/20 50 degrees - 29 oz w/ prop & slimline pitts muffler
13x8 Scimitar - 10,600 rpm
14x6 APC - 10,500 rpm
14x6 MA/black - 10,200 rpm
14x7 Scimitar - 9,600 rpm
14x8 APC - 9500 rpm
14x8 Scimitar - 9500 rpm
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O.S 91FX 2 cycle - YS 20/20 Magnum 65 Degrees 19 .oz without muffler or prop
13.5x8 Graupner - 11,200 rpm
14x8 Scimitar - 10,100 rpm
14x10 Zinger - 8500 rpm
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Saito .91 - 15% Omega 19 .oz with prop
13x8 APC -10,200 rpm
14x6 MA/black -10,100 rpm
14x7 Scimitar -9600 rpm
14x8 APC- -9100 rpm
15% Wildcat 18% oil - 55 degree day
13x9 APC - 9000 rpm
14x6 Master airscrew - 9400 rpm
14x7 Scimitar - 8500 rpm
YS 20/20 blend /Magnum
13x8 Scimitar - 10100 rpm
13x8 MA 3 blade - 9000 rpm
13x9 APC - 9300 rpm
14x6 Master Airscrew - 9600 rpm
14x7 Scimitar - 8800 rpm
14x7 Graupner - 8700 rpm - The 2 14x7 props gave a significant amount of thrust over the 14x6 MA.
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YS .91ac - 15% Omega 28 .oz without prop
13.5x8 Graupner -11200 rpm
14x7 2b Graupner -10,000 rpm
14x7 3b Graupner -8200 rpm
14x8 APC -10,200 rpm
14x8 Scimitar -10,000 rpm
15x8 Zinger - 8500 rpm
YS 20/20 blend /Magnum
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Saito 150GK - 15% Omega (revised 4-00) 31 .oz without prop
16x7 Scimitar/nylon -8900 rpm - This prop pulled very good veritcal, but tached slower than a APC16x8.
17x8 APC -8400 rpm
20/20 YS blend
16x8 APC -9200 rpm
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Zenoah G-23 - Bennett muffler 3.5 lbs with muffler and prop
16x8 APC -8200 rpm
16x8 Scimitar wood -7600 rpm
16x7 Scimitar Nylon -8100 rpm
G-23 after about 1 gal -
17x8 APC -8000 rpm
16x8 APC -8900 rpm
16x7 Scimtar -8600 rpm
16x8 Scimitar wood -8200 rpm
18x6 M. Airscrew/ wood -7200 rpm
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Brison 2.4 - Bennet muffler 3.25 lbs with muffler, ignition battery and no prop
18x8 Scimitar -8300 rpm
18x10 Scimitar -7800 rpm
19x8 Scim. Modified -7450 rpm
20x8 Scimitar -7000 rpm
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My Overall impression for 4 strokes and
sport flying, the plastic Scimitar props
and for gas, the wood Scimitar are hard to beat. They may not
tach as high as APCs
but they seem to perform as well or better in some cases. You can
get better props,
but not much cheaper, and they perform well.
I will add data as time and circumstances permit.