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Fred
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  • Member for 5 years
  • Last seen more than 4 years ago
12 votes
1 answer
5k views

Why does Canada recommend a minimum rate of climb for ultralights of 300 ft/min?

10 votes
5 answers
4k views

Why are the wings of some modern gliders tadpole shaped?

10 votes
2 answers
1k views

Why do gliders have bungee cords in the control systems and what do they do? Are they on all control surfaces? What about ultralights?

9 votes
4 answers
8k views

Does a 4 bladed prop have almost twice the thrust of a 2 bladed prop?

9 votes
2 answers
3k views

Did the twin engined Lazair ultralight have a throttle for each engine?

6 votes
2 answers
407 views

Why don't rudders stall at 30 deg deflection, as they don't have downwash to reduce local AOA like flaps and horizontal tails do?

4 votes
1 answer
295 views

Do wings on a plane need to be in the same plane horizontally, or can one wing root be 6" lower than the other?

4 votes
3 answers
2k views

What is the difference between experimental and amateur built aircraft in the US?

4 votes
2 answers
602 views

Do vortex generators increase Re of a wing?

4 votes
7 answers
1k views

Wouldn't a triplane be much more efficient than a monoplane of same wing area and span?

4 votes
1 answer
390 views

Does a tandem ultralight need flaps on the rear wing if the front wing has flaps?

4 votes
1 answer
920 views

Is lower wing loading safer?

3 votes
4 answers
615 views

What's the difference between an airplane that stalls nose down or just mushes in a stall?

3 votes
1 answer
173 views

What are the standard stability derivative formulas and typical GA values?

3 votes
1 answer
175 views

Does using a reverse high Cm horizontal tail airfoil coupled with a low Cm wing increase horizontal tail effectiveness?

3 votes
1 answer
575 views

Is there any legal way to fly an inline twin-engine aircraft with a single-engine certificate?

2 votes
1 answer
303 views

Would a triplane be way more efficient if the wings intersected at the tips to create one wing tip vortex instead of 3?

2 votes
1 answer
285 views

Do Alaskan bush pilots generate a Clmax of 5 with 90° flaps?

2 votes
1 answer
182 views

If pitching moment creates drag, how can high and low moment airfoils have almost identical drag polars?

2 votes
3 answers
584 views

How can an all flying rudder be almost 100% more efficient than a vertical stabilator and rudder?

2 votes
3 answers
541 views

Does a biplane need wing twist?

2 votes
1 answer
336 views

How to design a near vertical take off airplane?

2 votes
0 answers
360 views

How do Alaskan bush pilots land and take off in 10'? [closed]

2 votes
1 answer
161 views

Does using wings with different wing loadings work the same as a swing wing, without swinging the wing?

2 votes
1 answer
197 views

Low speed, low wing loading?

2 votes
1 answer
842 views

Would adding a slat and a slotted flap increase the max CL of a multi element airfoil to 6.5?

2 votes
2 answers
681 views

What happens when you put vortex generators on both sides of a symmetrical vertical tail?

2 votes
1 answer
278 views

Why did the Bede Bd5 have strakes on the horizontal tail?

1 vote
1 answer
1k views

What causes spiral mode instability and how do you minimize it instead of trying to dampen it?

1 vote
1 answer
83 views

What are typical stability analysis dampening values?