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Forum: Tech Log

13th Jul 2004, 12:51

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

RTA: sort of. In fact, leave the fuselage...

RTA: sort of.

In fact, leave the fuselage out of the equation - the effect of a fuselage on the behaviour of the winglet is very small (consider, for a wing of about 50ft semi span, your winglet...

Forum: Tech Log

12th Jul 2004, 19:49

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

Just did some very rough calcs based some some...

Just did some very rough calcs based some some antique wind tunnel data, so hopefully I won't be shot for using it.

Winglet was found to generate a sideforce (i.e. inboard along the span) of...

Forum: Tech Log

12th Jul 2004, 14:43

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

Just because you read it on the internet does not...

Just because you read it on the internet does not make it untrue, either.

There is plenty of scientifically verifiable data to support the aerodynamic behaviour which has been outlined here....

Forum: Tech Log

9th Jul 2004, 22:09

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

Another example occurred to me: Almost all...

Another example occurred to me:

Almost all fixed wing aircraft have the engine providing thrust along the longitudinal axis, give or take.

Yet somehow all these aircraft manage to overcome...

Forum: Tech Log

9th Jul 2004, 19:40

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

I think I used the phrase "extracts energy from...

I think I used the phrase "extracts energy from the vortex" several times while trying to explain the mechanism.

Thanks Keith, especially for the yachting example which is another good analogy.

Forum: Tech Log

9th Jul 2004, 15:24

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

Wow, a popular topic for discussion....who'd have...

Wow, a popular topic for discussion....who'd have thought aerodynamics could be so interesting....

I think the example that Thunderball 2 gave about the engine noise device is much the same...

Forum: Tech Log

7th Jul 2004, 18:33

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

747 Unfortunately, you'll have to install a...

747

Unfortunately, you'll have to install a wing, too. That might take up a few excess parking spaces .... :)

Eagles

It's not just a question of reducing drag caused by the vortices; the...

Forum: Tech Log

7th Jul 2004, 16:08

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

Fordhom While a body cannot, I agree,...

Fordhom

While a body cannot, I agree, generate a net force into "the flow" you have to be careful about "the flow".

The way the winglet can generate "thrust" (i.e. a force forwards along the...

Forum: Tech Log

7th Jul 2004, 04:07

Replies: 43

Thrust generated by winglets?

Views: 15,652

Posted By Mad (Flt) Scientist

Short answer is YES, thrust can be derived from a...

Short answer is YES, thrust can be derived from a well designed winglet. I posted a link to a site that explained this very question quite a while ago; let me try to find it again....it had diagrams...

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