As always great video!!!! Can you also make a long length video on how to design, analyze and build an aircraft from scratch? I know you have another video on this topic, but i'd like a more elaborate and detailed video. i am absolutely loving these videos. If i can help in any manner, I will. Please keep up.
The landing gear contributes a lot of drag even though its small compared to the rest of the aircraft. Because of its shape. Which is interesting. The tadpole shape is actually not used that much I think. Even in smaller general aviation aircraft, I think its somewhat tapered like the tadpole shape but its not really a tadpole. Practical reasons I guess. Lift induced drag is actually kinda complicated. Higher aspect ratio wings have their limitations. A longer, thinner, lower chord wing has more bending moments involved to carry the weight of the plane, requires more structure weight. Its a numbers game, trade-off. Also reduces fuel capacity depending. And maneuverability, but that might not be too important unless its a fighter or aerobatic. Keeping the CG close to the wing is good for efficiency. But the CG has to be substantially ahead of the wing's 'resultant lift point' or center of pressure or whatever, to ensure longitudinal stability. What do we mean by belly landing ? Also there are 2 prisms. The one shaped like a bullet I'm not sure about that shape. If its a prism. Which side is facing forward, against the relative wind ? And if the curved side is facing forward, why would it have a higher drag coefficient than the other prism ? Engine cowlings are good of course. But we have to make sure the engine has adequate cooling and intake airflow.
All valid points. There is always a trade-off in aircraft design. Belly landings are meant for small RC planes and UAVs landing on the ground/grass without a landing gear. Yes, there is a typing error : the 2nd prism should have been "bullet" with a CDo = 0.295. The flow is from left to right, as indicated by the arrow. The original data is taken from here: www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/airplane/shaped3.html
Can you explain the control surfaces and the proportion of the wing they occupy?
As always great video!!!!
Can you also make a long length video on how to design, analyze and build an aircraft from scratch? I know you have another video on this topic, but i'd like a more elaborate and detailed video.
i am absolutely loving these videos. If i can help in any manner, I will. Please keep up.
I am happy that you like the videos! Sure, I will try making one. Perhaps by using an RC plane / UAV as example.
The landing gear contributes a lot of drag even though its small compared to the rest of the aircraft. Because of its shape. Which is interesting. The tadpole shape is actually not used that much I think. Even in smaller general aviation aircraft, I think its somewhat tapered like the tadpole shape but its not really a tadpole. Practical reasons I guess. Lift induced drag is actually kinda complicated. Higher aspect ratio wings have their limitations. A longer, thinner, lower chord wing has more bending moments involved to carry the weight of the plane, requires more structure weight. Its a numbers game, trade-off. Also reduces fuel capacity depending. And maneuverability, but that might not be too important unless its a fighter or aerobatic. Keeping the CG close to the wing is good for efficiency. But the CG has to be substantially ahead of the wing's 'resultant lift point' or center of pressure or whatever, to ensure longitudinal stability. What do we mean by belly landing ? Also there are 2 prisms. The one shaped like a bullet I'm not sure about that shape. If its a prism. Which side is facing forward, against the relative wind ? And if the curved side is facing forward, why would it have a higher drag coefficient than the other prism ? Engine cowlings are good of course. But we have to make sure the engine has adequate cooling and intake airflow.
All valid points. There is always a trade-off in aircraft design.
Belly landings are meant for small RC planes and UAVs landing on the ground/grass without a landing gear.
Yes, there is a typing error : the 2nd prism should have been "bullet" with a CDo = 0.295. The flow is from left to right, as indicated by the arrow.
The original data is taken from here:
www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/airplane/shaped3.html
Thanks for getting back to me and answering my questions
Retractable undercarriage simply swaps form drag for induced drag.