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Forum: Tech Log

24th Feb 2008, 16:25

Replies: 26

What is more effective for braking?

Views: 6,004

Posted By Chris Scott

The drawing board

Quote from hawk37:
What if we used the same 150 Kts aircraft TAS and 100 Kts exhaust gas speed, but choose not to deploy the thrust reversers? In this case, the gases start out at 0 Kts relative to...

Forum: Tech Log

24th Feb 2008, 14:47

Replies: 26

What is more effective for braking?

Views: 6,004

Posted By Chris Scott

Brake fans

It occurs to me that, with the accountants demanding increasingly short turnrounds, high brake temps must be an increasing factor for short-haul departures.

Use of full reverse theoretically...

Forum: Tech Log

21st Feb 2008, 17:12

Replies: 26

What is more effective for braking?

Views: 6,004

Posted By Chris Scott

Quote from hawk37 (Chris, can you explain a bit...

Quote from hawk37 (Chris, can you explain a bit further?):
Assume the thrust angle of the exhaust is 60 degrees off of the direction of travel. Then surely the deceleration force is cos(60) *...

Forum: Tech Log

20th Feb 2008, 18:01

Replies: 26

What is more effective for braking?

Views: 6,004

Posted By Chris Scott

It depends how old the book is, Nakamura... And...

It depends how old the book is, Nakamura... And you have not mentioned which B737 you are talking about. If it is an old 737-200 with JT8D engines, it has a bucket reverser. If it is a 737-300 or...

Forum: Tech Log

20th Feb 2008, 17:12

Replies: 26

What is more effective for braking?

Views: 6,004

Posted By Chris Scott

Quote: So, it safe to assume that @ high...

Quote:
So, it safe to assume that @ high speeds, revers thrust is more effective than normal braking. And at low speeds it's the way around

Not quite. On a dry runway, modern brakes should...

Forum: Tech Log

20th Feb 2008, 17:06

Replies: 26

What is more effective for braking?

Views: 6,004

Posted By Chris Scott

Hi KasohiroNakamura, You didn't tell us which...

Hi KasohiroNakamura,
You didn't tell us which aeroplane you are discussing, but, if its a modern jet airliner with high-bypass-ratio turbofan engines, you already have good advice.

The wing...

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