Previous Thread
Next Thread
Print Thread
Rate Thread
Page 2 of 7 1 2 3 4 5 6 7
Re: For all the Pilots / WWII Buffs . . .
MarkSJohnson #377283 05/28/12 03:32 PM
Joined: Mar 2001
Posts: 1,387
Likes: 8
Ian Offline
President
connoisseur
Offline
President
connoisseur
Joined: Mar 2001
Posts: 1,387
Likes: 8
I believe the P47 is the fixed gear version of the Harvard.


Ian Colquhoun
President & Chief Engineer
Re: For all the Pilots / WWII Buffs . . .
Amie #377285 05/28/12 03:38 PM
Joined: Nov 2005
Posts: 1,236
connoisseur
Offline
connoisseur
Joined: Nov 2005
Posts: 1,236
No floor?


M3 and
M80
Re: For all the Pilots / WWII Buffs . . .
Amie #377287 05/28/12 03:48 PM
Joined: Sep 2004
Posts: 11,458
shareholder in the making
Offline
shareholder in the making
Joined: Sep 2004
Posts: 11,458
Ahhh, so I still have an eye for these things! smile

Thanks, Ian!


::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
Re: For all the Pilots / WWII Buffs . . .
Lampshade #377288 05/28/12 03:49 PM
Joined: Sep 2004
Posts: 11,458
shareholder in the making
Offline
shareholder in the making
Joined: Sep 2004
Posts: 11,458
Wouldn't stop most of the AA flak anyway, so why add the weight? grin


::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
Re: For all the Pilots / WWII Buffs . . .
Amie #377292 05/28/12 04:22 PM
Joined: Dec 2008
Posts: 6,928
axiomite
Offline
axiomite
Joined: Dec 2008
Posts: 6,928
Also helps if you need to take a .....


Half of communication is listening. You can't listen with your mouth.
Re: For all the Pilots / WWII Buffs . . .
Amie #377293 05/28/12 04:30 PM
Joined: May 2003
Posts: 18,044
shareholder in the making
Offline
shareholder in the making
Joined: May 2003
Posts: 18,044
Cool stuff. Incidentally, I was told by a fantastic docent at the Air and Space Museum in Dulles that the Huey's unique sound is also because the ends of the blades go supersonic.


I am the Doctor, and THIS... is my SPOON!
Re: For all the Pilots / WWII Buffs . . .
Lampshade #377296 05/28/12 05:30 PM
Joined: Nov 2010
Posts: 901
S
aficionado
Offline
aficionado
S
Joined: Nov 2010
Posts: 901
Originally Posted By: Lampshade
No floor?



That's so you can get up to speed on the runway.

Re: For all the Pilots / WWII Buffs . . .
Amie #377297 05/28/12 05:41 PM
Joined: Sep 2004
Posts: 11,458
shareholder in the making
Offline
shareholder in the making
Joined: Sep 2004
Posts: 11,458
Yabba Dabba Doo!


::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
Re: For all the Pilots / WWII Buffs . . .
MarkSJohnson #377303 05/28/12 06:48 PM
Joined: Feb 2005
Posts: 5,210
axiomite
Offline
axiomite
Joined: Feb 2005
Posts: 5,210
Originally Posted By: MarkSJohnson
That's awesome Ian!

For those that know about these things: Is this plane related to the P47? That's what this looked like to me.....


Originally Posted By: Ian
I believe the P47 is the fixed gear version of the Harvard.


Are you guys referring to the P47 Thunderbolt? If so, it is no relation whatsoever to the Harvard. The Harvard is a variant of the T-6 Texan and I believe the aircraft Ian is maybe thinking about is the predecessor to the Texan/Harvard, either the BT-19 or BT-15?

The P47 Thunderbolt is powered by a Pratt & Whitney R2800, 2,500HP radial engine and has speed around 400+ mph, the P47 was used primarily as a successful ground attack aircraft in Europe.

With WWII aircraft any aircraft with a 'T' designation was a trainer (T-6, BT-19 and etc..) 'P' designated Pursuit (P47, P51 and etc..) which was later changed to 'F' for fighter.

BT19...


BT15...


And P47...



Rick
Our Room

smile
Re: For all the Pilots / WWII Buffs . . .
Ken.C #377306 05/28/12 07:05 PM
Joined: Feb 2005
Posts: 5,210
axiomite
Offline
axiomite
Joined: Feb 2005
Posts: 5,210
Originally Posted By: Ken.C
Cool stuff. Incidentally, I was told by a fantastic docent at the Air and Space Museum in Dulles that the Huey's unique sound is also because the ends of the blades go supersonic.


I don't believe that's entirely true Ken, although aircraft and helicopter propellers can go supersonic they aren't designed do so and become very inefficient at supersonic speeds. We'll have to ask Tom (exlabdriver) but it is my understanding that the advancing blade (the upwind blade of a forward moving helicopter) is limited in speed so that it will not go supersonic.

I believe the unique sound from the Huey is due to the width and length of the blades rather than them going supersonic.

Ken, here is a simple explanation...

'Because the blade is rotating, and not flying straight into the air, then the outer tip will be moving through the air faster than the base. In fact, the airspeed of the blade will increase as you move out. So what will happen is that the tips of the blades will be the first to reach mach 1. A shock wave will form at the tip of the blade. As the blade increases rotational speed, the shockwave will move along the blade as more of the blade goes supersonic.

The big problem with this is that the blades really aren't designed to withstand the stresses of supersonic travel. They will end up disintegrating. It also means that a portion of the blade will be 'transonic' (at or near the speed of sound). In this region there are problems with airflow and controllability, which will severely hamper the performance of the blade. Loss of lift and poor control will be major symptoms. Noise is the other issue.'






Last edited by RickF; 05/28/12 07:17 PM.

Rick
Our Room

smile
Page 2 of 7 1 2 3 4 5 6 7

Moderated by  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,939
Posts442,452
Members15,615
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,441
SirQuack 13,840
CV 12,077
MarkSJohnson 11,458
Who's Online Now
0 members (), 221 guests, and 0 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4