8 votes
Accepted

How high could modern transonic commercial transport designers reasonably push L/D ratios?

First of all, I am sceptical regarding your graph. The Fokker F-28 or the Short 360 are way too good while the Boeing 767 looks poorer than what other sources claim. Size alone helps already by making ...
user avatar
3 votes

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

I know, this answer is almost three years late, but the existing answers leave important issues open. Now make it a triplane, which reduces the chord to roughly 1/3, increasing the aspect ratio from ...
user avatar
1 vote

Interpreting a graph depicting airfoil technology improvement

I don't think this graph is supposed to be very quantitative, otherwise there would be a "real" scale on both axes instead of the two-ended arrows and the hatched lines would be actual ...
user avatar
1 vote

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

Also three years late... From this comparison of mono, biplane and triplane efficiency, in level flight the triplane is only 70% as efficient as the mono, and the biplane is slightly better at 74%. ...
user avatar
  • 16.6k
1 vote

How does maximum speed vary with altitude?

From sea level to Ionospheres, it first increases because air drag decreases with altitude, until at a certain altitude the maximum velocity starts to decrease because engine performance decreases.
user avatar
1 vote

How to calculate the induced drag coefficient?

In the course of looking for other aero data I stumbled across this rather old question. For any future searcher like myself I thought to add a bit more info in case it could be useful. e - Oswald ...
user avatar

Only top scored, non community-wiki answers of a minimum length are eligible