Nabutso

Mitsubishi J2M3

Around 1 minute 30 seconds difference under military power. So at least it should climb in that much difference with WEP, assuming both the Kaseis run the same HP at WEP (1940hp)

There are certain examples of planes where a engine with different supercharger produces a higher rate of climb at military power but worse at WEP, like 109K4 with DB605db getting 16.5m/s at combat, 22m/s under WEP but the K4 with DB605dc getting 15.5m/s under combat and 24.5m/s under WEP. But those engines run different ATA at WEP (1.8 vs 1.98), same at military tho (1.45).


Anyways, the J2m5 in the game doesn't climb even remotely within 1 minute 30 seconds of the J2m3. They should be comparable to say D12 and D9 in terms of climbrate difference, not F8 and D9.

No kaisei engine runs above 1900 hp.

The reason the k4 climbs better on wep and worse on military is because it's heavier than the G 10 but produces the same power on military power. Wep is the only difference between it and the G 10.

Have you actually tested the climb (I'm curious)? 1 minute 30 seconds is a really long time.
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No kaisei engine runs above 1900 hp.

The reason the k4 climbs better on wep and worse on military is because it's heavier than the G 10 but produces the same power on military power. Wep is the only difference between it and the G 10.

Have you actually tested the climb (I'm curious)? 1 minute 30 seconds is a really long time.

J2M3 kasei 23 runs 1940 hp @ 1340 meters. 


 

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Yep.

fcuI4Nx.jpg

TAIC isn't a source. They never had the plane to base anything on.

If you don't trust my link then look at the document blakeob posted on the last page. 1820 hp as takeoff. Edited by fufubear
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TAIC isn't a source. They never had the plane to base anything on.
If you don't trust my link then look at the document blakeob posted on the last page. 1820 hp as takeoff.

[attachment=185773:image.jpg]

They did have a plane to base it off of. And remember, Japanese is on rated power.

Although the difference on takeoff power could be due to maybe different conditions of the engine or different test methods.
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image.jpg

They did have a plane to base it off of. And remember, Japanese is on rated power.

Although the difference on takeoff power could be due to maybe different conditions of the engine or different test methods.

Wasn't the plane captured post war though?

A lot of the tests on japanese planes happened post war like the n1k and Ki 84.
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Wasn't the plane captured post war though?
A lot of the tests on japanese planes happened post war like the n1k and Ki 84.

The TAIC for the J2M3 above you says date of may 1945 :P
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Wasn't the plane captured post war though?

A lot of the tests on japanese planes happened post war like the n1k and Ki 84.

First N1k test was calculated, next one was revised with actual specimen. 

There was no such issue with J2M. 

 

Edited by Messere4evrMUTE
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The TAIC for the J2M3 above you says date of may 1945 :P

But the war ended later than may.

First N1k test was calculated, next one was revised with actual specimen.

There was no such issue with J2M.

Did you check the date on the n1k taic report? Because I did and it states March of 1945. How could they adjust it to a plane they didn't fly yet?
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But the war ended later than may.
Did you check the date on the n1k taic report? Because I did and it states March of 1945. How could they adjust it to a plane they didn't fly yet?

There is a "note" for the N1k. 

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There is a "note" for the N1k.

The note means nothing because the sheet is dated for March of 1945.

To add to this they say based on findings and not "based on flight tests". These taic documents are based on any information they find from pilots, documents, etc. It's only really to get a close estimation on what the plane is capable of. Edited by fufubear
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Anyways, the TAIC is a better source than yours, going into much details about engine construction and such. I can actually post them if you guys would like.

RNQt0An.png

no it is not.

Taic did not have the planes or the engines at the time they created these sheets. They are making calculations based on whatever they can get. How do they know if they have wrong infromation? They don't.

That taic report is the only place online where you will find a kasei engine running above 1900 hp. Doesn't that seem a little odd to you (especially since we have actual japanese documents that state otherwise).
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Anyways, the TAIC is a better source than yours, going into much details about engine construction and such. I can actually post them if you guys would like.RNQt0An.png
 
5t5xRW7.png

Did you just rate a US document of a Japanese engine above a Japanese document of a Japanese engine? Thats kinda unfair on Japan.
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Did you just rate a US document of a Japanese engine above a Japanese document of a Japanese engine? Thats kinda unfair on Japan.

Maybe if they didn't do their speed and climbrate tests in 100% only...

Even Russian flight tests of their own craft aren't this conservative, and they are known for conservative testing. 

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Maybe if they didn't do their speed and climbrate tests in 100% only...
Even Russian flight tests of their own craft aren't this conservative, and they are known for conservative testing.

All those climb times on those glorious TAICs are on military..best to use the Japanese military climb speeds.

Japanese sources should mainly be used for Japanese aircraft, not US sources. Some US sources should be used as they are useful for other areas.
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Maybe if they didn't do their speed and climbrate tests in 100% only...

Even Russian flight tests of their own craft aren't this conservative, and they are known for conservative testing.

It wouldn't change how much power the engine put out.

Btw you can technically just calculate how much of a speed increase you can get from wep anyway. Same way taic did but this time you would know if you are using correct information.
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