Maybe the 190s arent wrong....or how to be really unpopular in 1 step

[Crumpp]

So it was built with both engines and both are correct.  Moving on.

So we can eliminate the engine as a source of possible additional drag in the majority of P51B/C/D series.

[Charge]

I was, too, under the impression that the bubble canopy was not  necessarily a drag reducing factor. The movement of air became more turbulent behind the canopy so that a fillet had to be added in front of vertical stabilizer to make it more stable.

So I just made a assumption that the better rear view was well worth the increase in drag.  Maybe it didn't affect the drag at all but only the stability?

-C+

[Crumpp]

The P51B/C's had the same stability issues and it was caused by the propeller.  The correction was the dorsal fin extension.

[Angus]

I've lost you Crumpp:
"--------------------------------------------------------------------------------
A reduction like that in parasite drag is stunning.
--------------------------------------------------------------------------------



It's an increase not a reduction. Look at the FW-190 weapon installation. Blisters, wing covers, barrels, and all the changes to the motor compartment.

Have you even seen the FW-190V5 series? They were new type prototypes without weapons and the very first installation of the BMW801 series. The earlier prototypes had the BMW139."

Thought you were talking about the drag on those two. That would roughly mean clean vs dirty. Never mentioned any finish.

[Crumpp]

I've lost you Crumpp:

You have not lost me a bit.  I do think your starting to see the holes in the:

Can we say somthing dosn't pass a smell test?

Argument.  


I am sure it does smell rotten when you do not know the details of the design changes and assume you know more than the actual engineers.

All the best,

Crumpp

[Angus]

So, please explain the types being tested and their differences A & B. Or is it buried somewhere earlier in the thread? Still looks like a big number to me but if it's "clean" vs "dirty" it should be ok...I think.

[PJ_Godzilla]

See Rule #10

[AWwrgwy]

First, I can no longer pull the graph. My firewall's screening its site.

It's probably not hosted anymore, being 3 years old

wrongway

[The Fugitive]

It only took him 3 years to do the math   

[Die Hard]

PJ_Godzilla = Crumpp?

[Scherf]

PJ_Godzilla = Crumpp?

Nah. "Or did I get this all wrong?" is not something Crumpp asks.

He has charts, you know.

[PJ_Godzilla]

PJ_Godzilla = Crumpp?

The Rubber Lizard doesn't lurk behind other aliases. The Rubber Lizard wades through buildings toward the center of town.

Sorry about the belated response. The thread predates me and I'm almost exclusively an LW flyer so I'm always thinking about how to wring performance out of the 190s. I find the 109s to be much easier, honestly, and have taken a real shine to the G-14 lately. Of course, the K-4 is more capable in all but the flat turn but the G-14 is a sweet balance - as is the F-4. Too bad about the crappy dive performance. If it had that, it'd be perfect.

Anyway, I'm sure I went through all this in Aircraft Performance - I actually took that class from N.X. Vinh, former commander of the RVN Air Force, UM Prof after that.

[Badboy]

Anyway, I'm sure I went through all this in Aircraft Performance - I actually took that class from N.X. Vinh, former commander of the RVN Air Force, UM Prof after that.

You are a lucky guy, Nguyen X. Vinh was not only a pilot and aerospace engineer but also an outstanding mathematician. I've read some of his work, and own one of his books, but never met or communicated with him.

Badboy

[PJ_Godzilla]

You are a lucky guy, Nguyen X. Vinh was not only a pilot and aerospace engineer but also an outstanding mathematician. I've read some of his work, and own one of his books, but never met or communicated with him.

Badboy

Indeed... he wrote me a letter of recommendation for my grad school trip out to Palo Alto. Not only was N.X. Vinh what you say, he was also a chain-smoking gambler who would never spend more than rock-bottom on a new car. I recall his new Escort wagon in 1985 - I didn't know you could delete the trim rings for credit.

Anyway, he was a fun-loving guy - from what I new of him. I always thought of him as a cross between a typical fighter pilot and a stereotypical Vietnamese: think of Maverick meets the VC Russian roulette player in the Deerhunter Tiger Cage.

He complained a bit about the Spitfire, btw. He said their turn rate was such that he was never sure on which side of the obstacle he needed to be. He depicted this, to a lot of laughter, in his heavy Vietnamese accent on the board via crude cartoons one day - jumping a stick figure from one side of a wall to another.