information 5:15 the location of the central main spar and the cg line should coincide; Near fifty percent of root chord. which corresponds to the thirty percent of mac line. many hardware stores sell poplar dowels, etc. for use as spars. and as long pushrods.! 5:30 WRONG.! in a built-up swept wing you will find that there is a central main spar, spanning the fuselage and perpendicular to it.! located at thirty percent of mac.! in other words, your not-straight across spar is a design FAIL. 8:08 locate the edf unit aft-of the cg such that its mass can be correctly offset, with the mass of the battery, etc. forward-of the cg. 13:58 there should be a specific amount of taper in an edf exit duct, over a distance of at least six inches. the tapering should result in an opening/area that is equal to the Effective swept area of the impeller. 16:12 the mass of the elevon servos SHOULD be located just forward-of the cg.!!! this type of airframe has inherent tail-heaviness in its dom. consequently, it is the opposite of smart to make the the condition worse, by putting the mass of three servos aft-of the cg.!!!!! d
If you’re worried about losing orientation, PUT A CAMERA ON IT. I dunno what is with you fixed wing guys but why you’re not putting cameras on is beyond me.
This is brilliant!
information 5:15 the location of the central main spar and the cg line should coincide; Near fifty percent of root chord. which corresponds to the thirty percent of mac line. many hardware stores sell poplar dowels, etc. for use as spars. and as long pushrods.! 5:30 WRONG.! in a built-up swept wing you will find that there is a central main spar, spanning the fuselage and perpendicular to it.! located at thirty percent of mac.! in other words, your not-straight across spar is a design FAIL. 8:08 locate the edf unit aft-of the cg such that its mass can be correctly offset, with the mass of the battery, etc. forward-of the cg.
13:58 there should be a specific amount of taper in an edf exit duct, over a distance of at least six inches. the tapering should result in an opening/area that is equal to the Effective swept area of the impeller.
16:12 the mass of the elevon servos SHOULD be located just forward-of the cg.!!!
this type of airframe has inherent tail-heaviness in its dom. consequently, it is the opposite of smart to make the the condition worse, by putting the mass of three servos aft-of the cg.!!!!! d
If you’re worried about losing orientation, PUT A CAMERA ON IT. I dunno what is with you fixed wing guys but why you’re not putting cameras on is beyond me.