byoungplumbing(at)gmail.c
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 Posted: Fri Mar 18, 2016 7:07 am Post subject: Kolb-List Digest: 3 Msgs - 03/17/16 |
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I have a specific question which you might be able to answer: If you put the wing
on a FireStar at the lower incidence angle of the Slingshot, and then put on
the taller gear from the Slingshot, would you get both benefits (a higher cruise
speed from the tailboom flying straight), AND better STOL performance (from
the higher ground angle)?
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I don't think the tail boom has a lot more drag flying tail high vs level. It is such a small angle I believe it to have a laminar flow. Could it be possible that longer gear legs at 90 deg to the air flow would have more drag than the tail boom at a small angle? Especially considering the tail boom is flying in disturbed air from the fusealage/prop wash. Check the airlines. The back quarter of the cabin area is racked up at a greater angle than the Kolb tail boom in flight. Some of the reason is for ground clearance when they rotate, but if the drag increase was so high caused by the angle. They would decrease the angle and increase rotation speed.
If you change the wing incidence, you need to change the incidence of the horizontal tail plane. Engine mounting angle..,. At any given speed and angle of attack there is only so much lift. Now if you change the wing profile,,,,, you could get some benefits in some areas, but at the same time you would loose benefits in other areas... Ex. To get a faster cruise. You loose slow speed on take off and landing/ slower climb... Pick what you want, but be prepared to pay.
To use John's idea of the other day,,,,, if you design a plane that will take off and land at 25 mph, climb at 2500 fpm, cruise at 225 mph and the engine only burn 1gph. Keeping the cost under fifty thousand...... Every pilot in the country would want one.
Boyd Young
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