Constant Speed Prop vs Variable Engine Timing

Dan

We normally cruised about 240 mph IAS under 10K in low blower. When
escorting bombers we would cut back to 190-225 or such for duration
and range. Still had to 'S'.

As I remember:

3000 rpm and 61 in. HG for T/O. Only time I pulled 67 In. HG (War
Emergency) got detonation even with the 'purple' (115-145
octane) gas.
2700 rpm and 45 in. HG for climb.
2200-2400 and 30-35 in. HG for cruise.
100 mph landing speed.
Final was 115 mph +/- depending on weight and reducing over over run
to stick on end of R/W.

Been a long time ago and could have been 125-130 cruise?? but seem to
remember it was a little higher than that.

Remember it was not close to stall speed and comfortable to fly.

Dash one shows that 1400 rpm/24 in. = 140 CAS at sea level where we
were flying but am sure the power setting was lower than that.

The '51 was a pretty slick bird and both oil and coolant doors were
probably stream lined due to low power output so no extra drag there
and still got the heat boost/thrust.

Weren't many rules back then and you could do a lot of things
especially during the war.

One story about a P-47 jock in Italy after VE day. One of the things
they did was capsize sail boats by flying over at full throttle and
low altitude and pulling the nose up as they went over and the prop
blast in the sails would turn the boat over.

So, one day this guy was out screwing around and there was a big fancy
sail boat and he made the pass and capsized it. Next day the word came
down asking who was flying that day and was turning boats over? The CO
asked around and sent the jocks name up the line thinking it was some
Italian big wig complaining.

Seems that all the Generals were out for a Sunday sail and partying
and they got turned over. Next day this guy was on a boat for the
Pacific and stayed well after VJ day G They wouldn't let him come
home even though he had the points.

With nothing but time on his hands, he used to fly (P-51) up to the
British (BCOF) base at Bofu (Honshu) that had a hill in the center of
the field with the tower on it. He wouldn't call in but dive down to
deck off the field and as he got to field roll over inverted and fly
across the field going up and over and then down the hill at 20 FT
altitude or so. BCOF troops thought that was wonderful and asked our
base who was doing it so they could invite him up to meet the troops
and have a party. When the Base CO found out he sent the guy home to
be kicked out so guess he finally broke the chain and got his
discharge G

Big John

On Wed, 03 Mar 2004 02:03:45 GMT, "Blueskies" wrote:

I didn't mean stressing, it was really just ticking over, and still you were going 140-150 mph - what was the power
output at that setting?