L Edge
Master member
At the flying field one day many years ago, a member gave me a F-117 that was a mess. He couldn't get it to fly so I ended up with it. It was a beast and very unstable and it lasted about a dozen flights before the ground god's got it. So I decided to explore deltas, but I wanted something that is easy to fly and can handle winds.
Being old school, played with sheets of paper and decided to have a cambered surface on the top and flat on the bottom like a trainer. Did some research in NASA, so I ended up sketching an airfoil(to explore blended wing body and see what happens.) Most of my other designs were in the 30ish numbers, so I ended up with he finished product of
Length 34 inches
Width 32 inches
Motor E-flight Park 370
Prop APC 7 x 5
CG is 21" from nose
Knew I needed vertical end plates for stability and wanted desperately prop protection. So end up 4.5 at base, 2 inches at top and 5 inches vertically.
For prop protection, shaped 2 inner vertical plates on paper so it was 2 3/4 inch below plan and blended in shape.
Cut out area for motor/prop and allowed 6 1/4 " gap which gave the elevons a dimension of 2 1/2" wide by 11 1/2' length. Made gap wide enough for an 8" prop just in case it would fly better/worse han the 7.
Now for the angle of the delta. After many trials by error, ended up with a 2 17.5 degree angle for a total angle of 35 degrees.
Need to exit now. Will continue--
Being old school, played with sheets of paper and decided to have a cambered surface on the top and flat on the bottom like a trainer. Did some research in NASA, so I ended up sketching an airfoil(to explore blended wing body and see what happens.) Most of my other designs were in the 30ish numbers, so I ended up with he finished product of
Length 34 inches
Width 32 inches
Motor E-flight Park 370
Prop APC 7 x 5
CG is 21" from nose
Knew I needed vertical end plates for stability and wanted desperately prop protection. So end up 4.5 at base, 2 inches at top and 5 inches vertically.
For prop protection, shaped 2 inner vertical plates on paper so it was 2 3/4 inch below plan and blended in shape.
Cut out area for motor/prop and allowed 6 1/4 " gap which gave the elevons a dimension of 2 1/2" wide by 11 1/2' length. Made gap wide enough for an 8" prop just in case it would fly better/worse han the 7.
Now for the angle of the delta. After many trials by error, ended up with a 2 17.5 degree angle for a total angle of 35 degrees.
Need to exit now. Will continue--
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