Paddle blades

[Bosco123]

The jugs had these for that it would climb longer.now I was flying today and I had higher elevation on this LA do I dived on him and he climbed, yet he out climbed me for some reason and I died.

the jugs should have more climb then what it has

[Fulmar]

Depending on your altitude and if WEP was engaged the LA7 will be able to outclimb any P47.  Without WEP up to 20k+ feet the LA7 will outclimb all P47s.  With WEP the LA7 can outclimb the P47 from 0-10k+.

[Bosco123]

yea I had WEP on the whole wile, it was weird thought i could

[Krusty]

P47s are not "good climbing craft" -- most of the later US planes are heavy, and great at alt and speed, but not at climb. Check out the "DokGonzo's comparison" link in my sig. Choose any planes (up to 4) and compare their rate of climb, speed at varying alts, turn radius, and more.

[SgtPappy]

Paddle blades are more efficient and can help an aircraft climb better but it's not like they're some kind of magical mechanism that will sprout an extra 100 horsepower for you. Sustained climb ability is decided mainly by power loading (power to weight ratio) which fights gravity, and, to a lesser extent, the aerodynamics of the aircraft.

The P-47 has a pretty bad power loading and it can't really sustained climb all so well.  

Also the La-7 may have gained a lot of speed and may have actually been diving at something like 460 mph when you caught it under you.

[bozon]

Sustained climb ability is decided mainly by power loading (power to weight ratio)

True if you are a rocket. For planes, this is not even half of the story.

The P-47 has a pretty bad power loading and it can't really sustained climb all so well.

At sea level, maybe. Over 20k this was one of the better power loaded planes.

Paddle blade props added about 500-800 to climb rate and a corresponding improvement in acceleration. Top speed at low alt was actually reduced by a few mph if I remember correctly. The best performing D jug is the one we don't have - a razor back with a paddle blade prop. Slap a paddle blade prop on the D11 and rename it Spitbolt (ok, I'm exaggerating...)

[Bosco123]

I don't expect it to give me 100mph magicle diffrence, but inted of falling off and getting shot down i'm good at getting to 200ft and shoot them down but wasn't even close to that

[TwinBoom]

Originally posted by Krusty
P47s are not "good climbing craft"

[WaspR2800]

I agree, I think the D-11 should be fitted with a paddle prop.

Also Something should be done about improving the jugs acceleration in a dive. I find it funny when the P-47 should be able to out dive anything and yet we have spits and hurricanes catching up to us in dives. It is one feature that I would like to have in that particular aircraft.

[SgtPappy]

Originally posted by bozon
True if you are a rocket. For planes, this is not even half of the story.

 
My bad. But since it's clear I haven't learned enough, please educate me on what climb is determined by.

I remember about a year ago when I first got interested, I used to think that it was purely the shape of a plane's wing that determined climb rate

[NHawk]

Originally posted by WaspR2800
.....
Also Something should be done about improving the jugs acceleration in a dive. I find it funny when the P-47 should be able to out dive anything and yet we have spits and hurricanes catching up to us in dives. It is one feature that I would like to have in that particular aircraft.

Be careful when making statements like this.

If a spit or hurricane already has a speed advantage, they will catch you before you are able to accellerate away.

If you are both at equal speeds the P-47 will run away from them. (Hurricane may keep up but won't catch the 47)

If you're below 15k, you're really rolling the dice on diving away.

If you dive away and the other plane holds altitude, follows you and waits for your e state to decrease you could be dead meat.

And don't think the P-47 can out dive everything. Right from the get-go the Mustang pulled away from the P-47 in dive trials.

[The Fugitive]

Originally posted by Bosco123
The jugs had these for that it would climb longer.now I was flying today and I had higher elevation on this LA do I dived on him and he climbed, yet he out climbed me for some reason and I died.

the jugs should have more climb then what it has

Another one bitten by the "DogFights" blah,blah, blah:D

[bozon]

Originally posted by SgtPappy
Originally posted by bozon
My bad. But since it's clear I haven't learned enough, please educate me on what climb is determined by.

Energy is probably the simplest way to look at it. Climb does not depend on power loading. It depends on EXCESS power loading. Excess means power available after you "paid" your drag expense.

Remember that drag comes in two flavors (physically it is the same phenomenon, but in aviation it is divided):
Parasitic - viscous, generated in small scales of the boundary layer between the airflow and the skin. It increase with air velocity.
Induced - caused by large scale aerodynamic effects - the creation of lift and therefore linked to the angle of attack.

Every plane has a sweet spot where the total drag reaches a minimum for a given lift produced. Induced drag will go down with speed (lower AoA needed to produce the same lift) and parasitic always increase with speed. The drag cost therefore changes with speed. Some planes are very good at climbing at low speed, others may reach the same climb rate, but require higher speed to do that (resulting in a shallower climb, but at the same RATE!). The Mosquito for example is a good high speed climber. Its rate of climb falls slowly with increased speed. F6F has a very low best-climb speed and loose climb rate fast if you increase it.

The power we are talking about is not HP measured on the engine shaft. It is actual effective power supplied by the prop. Again, depending on prop design, you can make a prop very efficient at low speeds - that will be a good climbing/accelerating plane, or you may prefer it to be efficient at high speeds - if max speed is what you are after. Usually, it is one at the expense of the other. There are many variables that determine prop efficiency.

Paddle blade props were good for high altitudes and the improvement was mainly in the climb/acceleration and not in top speed. IIRC, in the 9th AF, late in the war, some replaced the prop back to the toothpick since it gave slightly better speed down low (this paragraph is from what I remember reading. I have no details about that).

You can try to find some data here:
http://www.wwiiaircraftperformance.org/

[Bosco123]

Originally posted by The Fugitive
Another one bitten by the "DogFights" blah,blah, blah:D

I guess hes not a jug pilot

[Jonny boy 8]

the p47N has paddle blades, if u look closley and compair the other p47s the p47N has wider blades.

BlueP51s