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Forum: Tech Log

8th Apr 2023, 09:24

Replies: 50

A light aircraft will descend faster, so will a heavy one..

Views: 7,287

Posted By Central Scrutinizer

I guess it has to do with the level of...

I guess it has to do with the level of simplification. My statement is correct as a "first approximation" with simplifying assumptions such as small angles etc. One can always go one step deeper in...

Forum: Tech Log

7th Apr 2023, 11:20

Replies: 50

A light aircraft will descend faster, so will a heavy one..

Views: 7,287

Posted By Central Scrutinizer

I've had a look at the chart but don't get where...

I've had a look at the chart but don't get where you're coming from.

Could you please elaborate?

Forum: Tech Log

3rd Apr 2023, 16:54

Replies: 50

A light aircraft will descend faster, so will a heavy one..

Views: 7,287

Posted By Central Scrutinizer

Well then the limitation becomes the Vmo....

Well then the limitation becomes the Vmo. Assuming Vmo is a fixed number independent of mass, both aircraft descend at the same IAS, the heavier one should have a higher L/D ratio (more lift for the...

Forum: Tech Log

3rd Apr 2023, 16:21

Replies: 50

A light aircraft will descend faster, so will a heavy one..

Views: 7,287

Posted By Central Scrutinizer

Depends on the boundary conditions of the...

Depends on the boundary conditions of the problem.

If the speed is free, max L/D is a function of geometry alone and not mass. The glide angle will be the same but the speed will vary.

Forum: Tech Log

3rd Apr 2023, 15:57

Replies: 50

A light aircraft will descend faster, so will a heavy one..

Views: 7,287

Posted By Central Scrutinizer

What you are looking at is the descent angle...

What you are looking at is the descent angle (gamma) which is a function of the lift to drag ratio L/D.
As a first approximation, the aircraft with the higher L/D will descend at a shallower angle...

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