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Forum: Tech Log

6th Mar 2005, 13:14

Replies: 26

Speed for maximum range

Views: 7,544

Posted By Keith.Williams.

It is certainly the case that if DP is...

It is certainly the case that if DP is proportional to EAS squared and DI is proportional to 1/EAS squared, throughout the entire speed range, and we ignore all other possibilities, then the best...

Forum: Tech Log

23rd Feb 2005, 07:20

Replies: 26

Speed for maximum range

Views: 7,544

Posted By Keith.Williams.

ALEX, My use of the term "narrow and deep or...

ALEX,

My use of the term "narrow and deep or shallow and wide" was deliberate, but you do not appear to understand its significance.

Let's imagine an aircraft for which CDP is zero and CDI is...

Forum: Tech Log

22nd Feb 2005, 20:04

Replies: 26

Speed for maximum range

Views: 7,544

Posted By Keith.Williams.

Thank you ALEX. It is worth noting that the...

Thank you ALEX.

It is worth noting that the way in which the drag coefficients actually vary with changes in speed is one of the factors that determine whether the drag curve is shallow and wide...

Forum: Tech Log

22nd Feb 2005, 18:05

Replies: 26

Speed for maximum range

Views: 7,544

Posted By Keith.Williams.

ALEX, The problem is not in the calculus,...

ALEX,

The problem is not in the calculus, but is in the conclusion that you are drawing from it.

Mathematics can be a very powerful tool, but we must be very careful in how we use it. ...

Forum: Tech Log

19th Feb 2005, 07:32

Replies: 26

Speed for maximum range

Views: 7,544

Posted By Keith.Williams.

The most simple approach to this question is to...

The most simple approach to this question is to note that the trangent to the drag curve touches at Vmrc. This is typically in the region of 1.32 Vmd. For jet aircraft this is the maximum still air...

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