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Forum: Tech Log
22nd Sep 2021, 02:55
Replies: 26
Views: 5,682
Posted By LLClimb

No journal is interested?

For a 747-100 starting a climb at 10,000 ft to a higher cruising altitude, the flight manual specifies 290 kts as climb speed. My study shows that B747-100 can climb at 40 kt higher speed and still...
Forum: Tech Log
7th Sep 2021, 20:43
Replies: 26
Views: 5,682
Posted By LLClimb

Someone has done it

Thank you very much. This is the answer to my original question if someone has done this already. Figure 11 is exactly the concept I'm working on. However, Table 6 says that you use more fuel if you...
Forum: Tech Log
7th Sep 2021, 14:50
Replies: 26
Views: 5,682
Posted By LLClimb

Climbing point to point

BizJetJock

That is consistent with what I found. I found a way to calculate the best speed (least fuel used) to climb from point to point, not from level to level. The max rate climb speed in the...
Forum: Tech Log
7th Sep 2021, 05:30
Replies: 26
Views: 5,682
Posted By LLClimb

Optimum speed?

BizJetJock

Very interesting. Does Bombardier recommend a speed to climb to a point?
Forum: Tech Log
6th Sep 2021, 04:08
Replies: 26
Views: 5,682
Posted By LLClimb

There is a climb speed, called “Lean and Long...

There is a climb speed, called “Lean and Long Climb (LLC)” speed that maximizes fuel saving from a direct climb to a target point at higher altitude, over an indirect climb with minimum fuel climb...
Forum: Tech Log
5th Sep 2021, 14:22
Replies: 26
Views: 5,682
Posted By LLClimb

Saving climb fuel

I've found that you can climb at speed faster than max rate climb speed (Vy) and save fuel. When you climb at faster speed, you will get a longer ground distance. So if you climb from the same...
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