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Yishht87 -> R/C Combet Test Aircraft Designs (4/9/2008 3:39:25 PM)
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Well, hi.
I think that the airplane will definitely fly. I found a very useful and quite an accurate online aerodynamics calculator on www.RCAdvisor.com . This is a very nice calculator which is meant for electric airplanes- but suites gas airplanes as well. I hope there will soon be an update to the calculator with gas engines . If you want to go there, become a member of the site for FREE and then you can use all the features of that calculator. That calculator counts drag ans lift and their coefficients, and all the other things like zero lift angle, wing loading and all that. So, here is what I came up with:
Airplane Dimensions:
Wingspan total = 147.9 cm
Length total = 123.2
Height total = 31.4 cm w/o rudder
Specifications:
Airplane Efficiency at 100 % Thrust at 60 km/hour:
Wing Loading = 28.464 oz/ft^2
Wing Lift = 2.5 kg
Thrust = 1.468 kg
Wing Reynolds Number = 109.906 k
Total Drag = 0.108 kg
Climb Rate = 320.088 km/hour or 88.913 m/sec
Airfoil Efficiency at 100 % Thrust at 60 km/hour or at .49 % Mach Speed:
Lift Coefficient = 0.404
Drag Coefficient = 0.025
Pressure Drag Coefficient = 0.019
Zero Lift Angle = -2.195
Guys, please tell me is the height of my airplane okay? Because I have small doubts on that if 31 cm will be okay for a 1.5 meter span wing. Will it be okay or should I make it smaller? Keep in mind the airplane will have to fly with a .50 and max .60 gas engine.
Thank you,
Yishht.
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