"Larry Dighera" wrote in message
...
On Tue, 9 Jan 2007 21:24:33 -0500, "Capt. Geoffrey Thorpe" The Sea
Hawk at wow way d0t com wrote in
:
...
From http://www.t18.net/resources/T-18%20orig%20hdbk.doc page 34

(Perhaps you'd be good enough to cut and paste the reverent section
into a follow up. I'm uneasy opening MS Word documents from anonymous
sources.)

Gee, I can't imagine why...

Not sure how the formatting will come out but here is data for one T-18:



CRUISE PERFORMANCE



Standard Temperature, Lean Mixture, 135 BHP used as 100% Power Base



% TAS %
TAS

POWER RPM MPH GPH MPG POWER RPM MPH GPH MPG



SEA LEVEL 2000 FT



50 2060 137 5.6 24.5 50 2100
137 5.6 24.4

60 2320 154 6.6 23.3 60 2360
154 6.6 23.2

70 2490 165 7.5 21.9 70
2540 166 7.6 21.8

75 2550 170 8.0 21.2 75
2600 171 8.1 21.2

80 2610 174 8.4 20.6 80
2660 175 8.5 20.6

90 2730 181 9.3 19.4 90
2780 182 9.4 19.4

100 2820 187 10.2 18.4 100 2870
188 10.3 18.3

114 2910 194 11.3 17.2 107 2910
192 10.8 17.8





% TAS %
TAS

POWER RPM MPH GPH MPG POWERRPM MPH GPH MPG



4000 FT 6000 FT



50 2120 137 5.6 24.3 50
2140 137 5.7 24.2

60 2390 154 6.7 23.1 60
2420 155 6.7 23.1

70 2570 167 7.6 21.9 70
2600 168 7.7 21.9

75 2640 172 8.1 21.2 75
2670 174 8.1 21.4

80 2710 176 8.6 20.6 80
2740 179 8.6 20.8

90 2810 183 9.4 19.4 90
2840 186 9.5 19.6

100 2910 189 10.3 18.3 94 2880
188 9.8 19.1





% TAS %
TAS

POWER RPM MPH GPH MPG POWER RPM MPH GPH MPG



8000 FT 10000 FT



50 2160 137 5.7 24.1 50
2180 136 5.7 23.9

60 2440 156 6.7 23.2 60
2450 158 6.7 23.5

70 2620 172 7.7 22.4 70
2650 176 7.7 22.8

75 2700 178 8.2 21.8 75
2730 183 8.2 22.3

80 2780 183 8.7 21.2 80
2810 188 8.7 21.6

86 2830 189 9.2 20.6



Power and fuel flow data are based on Lycoming performance charts for the
0-290-D2, dependent upon Manifold Pressure, RPM, OAT, and Pressure Altitude.
Speeds based on speed course calibrated airspeed system.




fwiw:

t18.net is a pretty good place to get infomation. By T-18 builders for T-18
builders

The guy who wrote the aircraft handbook that I copied this from is a very
meticulous Aero engineer who used to work in flight test for one of the big
aerospace companies in the U.S. He puts a lot of effort into the details -
his O-290 T-18 is as fast as many of the O-360 powered T-18's And, knowing
how he works - I would trust his data before I would trust any of mine...


--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
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