Author Topic: Allied perk planes (Read 967 times)

Sancho · « **Reply #30 on:** February 20, 2001, 04:07:00 AM »

Preach on Brother Buzzbait!!

With the addition of the TA-152, we will need an uber hi-alt allied plane, and the P-47M fits the bill. Also 100% agreed on the Razorback jug, which would be a better mid-low alt scrapping plane.

Lephturn · « **Reply #31 on:** February 20, 2001, 07:40:00 AM »

We gotta have a Razorback Jug! It just SOUNDS too cool.

I'll take the 47M or N to tide me over until then though.

------------------
Lephturn - Aces High Chief Trainer
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"Nothing is so firmly believed as that which we least know." - Michel Eyquem, seigneur de Montaigne. (1533–1592)

funked · « **Reply #32 on:** February 20, 2001, 11:31:00 AM »

Widewing, the same technique you used to show that the N1K2-J did not have more than 1400 hp will show you that 3450 hp will not make a P-47 go anywhere near 480 mph at sea level. I have a feeling somebody misprinted the altitude or speed, or forgot to mention that the plane dove from 10,000 feet.

Widewing · « **Reply #33 on:** February 20, 2001, 12:08:00 PM »

Quote

Originally posted by funked:
Widewing, the same technique you used to show that the N1K2-J did not have more than 1400 hp will show you that 3450 hp will not make a P-47 go anywhere near 480 mph at sea level. I have a feeling somebody misprinted the altitude or speed, or forgot to mention that the plane dove from 10,000 feet.

I calculate a HP/f ratio of 540. That's better than twice that of the F6F-5. The P-63A, which can attain about 390 mph at sea level has a HP/f ratio of 293.

Required thrust to attain and maintain 480 mph is:
375 x .80 x 3,450/480= 2156 lbs

With regards to the Republic test data: All test hops mentioned utilized instrument panel cameras to record all readings. In addition, the airspeed measuring system was calibrated prior to each flight. I recall that each speed run was begun at 200 ft (over Long Island Sound)and 200 mph. From this baseline, the pilot went to full power and maintained this until the aircraft stopped accelerating. For comparison, did not the Tempest prototype top 470 at sea level?

My regards,

Widewing

juzz · « **Reply #34 on:** February 20, 2001, 04:58:00 PM »

The Tempest prototype did do 477mph in level flight, but no way was it at s/l. It would have been at around 18,000ft. The production Tempest V with the 2420HP Napier Sabre IIB did 390mph at s/l. The Tempest II with the 2500HP Bristol Centaurus V radial did 406mph at s/l.

Jack55 · « **Reply #35 on:** February 20, 2001, 05:08:00 PM »

Widewing, what armament did the XP-72 have?

Sancho · « **Reply #36 on:** February 20, 2001, 05:11:00 PM »

I believe the XP-72 had 6 50 cals.

juzz · « **Reply #37 on:** February 20, 2001, 05:24:00 PM »

They were thinking of 4x37mm too.

Widewing · « **Reply #38 on:** February 20, 2001, 05:42:00 PM »

Quote

Originally posted by Jack55:
Widewing, what armament did the XP-72 have?

As flown, the two prototypes were fitted with six .50 caliber Brownings. There was some discussion by the AAF to employ four 37 millimeters cannons. This requirement was even inserted into the contract issued for 100 P-72A fighters in June of 1944. However, Republic countered by taking an exception to the requirement, citing the simple fact that this armament would not fit into the wings. Someone wised up and revised the specification to include eight .50 caliber machine guns. Meanwhile, Republic worked up a proposal to install four 20 mm cannon. However, all of this was moot when the contract was cancelled after the AAF reviewed Republic's proposal for the XP-84 jet fighter. The USAAF was unwilling to commit to 20 mm cannons and rejected a similar proposal for the XP-84, which was built with six fifties. Even these were later reduced to just four in production aircraft.

My regards,

Widewing.

funked · « **Reply #39 on:** February 21, 2001, 09:12:00 AM »

Wow Widewing sounds like it was for real then. Scary!!!

Pongo · « **Reply #40 on:** February 21, 2001, 09:21:00 AM »

Man.
The secret weapons of the LW really missed some bad bellybutton american planes.
Could you imagine that thing with 4 hispanos...
Ill let the slide rule crowd decide if it was supersonic at sea level or not but wow.
And the US held it back. Probably cause they were wining so well with what they had.

Ah the Luftwaffe, the Washington Generals of the History Channel.

Jimdandy · « **Reply #41 on:** February 21, 2001, 09:26:00 AM »

LOL! Could you imagine what a jabo plane that would have been if they could have installed the 37mm. LOL!

Pongo, Mach one at sea level is about 720 mph if I remember right.

[This message has been edited by Jimdandy (edited 02-21-2001).]

funked · « **Reply #42 on:** February 21, 2001, 09:40:00 AM »

Yeah I always crack up when I see "Luftwaffe '46" or that kind of stuff, because they always compare to P-51 or B-29. They need to compare to fighters like this and bombers like B-36, B-42, B-45.