I'm looking for data on Merlin, DB601, and BMW801

[joeblogs]

Can anyone point me to some engine charts for the Merlin, DB601, and BMW801 engines, especially the variants used in planes modeled in AH?

I need data on engine weight, output (HP), MAP, RPM, and fuel consumption at various settings and altitudes.  I already have a fair amount of descriptive statistics from sources such as Gunston or Jane's.  What I really need is power and fuel curves for these engines.

-Blogs

[aircav]

All I have in the office at the moment...

more later hopefully

[salem]

Aircav here...


Data for the DB601



Should be fairly self explanatory. For comparison with allied data, you will need to convert kg and grams into lbs, and metric horsepower (PS) into 'real' horsepower. Try this site:

Power Conversion

I also have some original German power curves for the DB60x series and the BMW801. Unfortunately they're to big for my scanner, and I haven't tapped them into Excel yet. Give me a shout if you need any specific performance points.

regards,
aircav

[Angus]

You might find this thread useful, - there are some nice links in it as well

http://www.hitechcreations.com/forums/showthread.php?s=&threadid=69762&highlight=Merlin+and

[jconradh]

This is great plz keep it coming. - Blogs

Originally posted by Angus
You might find this thread useful, - there are some nice links in it as well

http://www.hitechcreations.com/forums/showthread.php?s=&threadid=69762&highlight=Merlin+and

[hazed-]

great site for aircraft engines:


http://www.enginehistory.org/

[joeblogs]

Great Stuff on the 601.  Thanks!

I would love to see some of these curves for the 801D.

Also, does anyone have data on time between overhauls for these engines?

-Blogs

Originally posted by salem
Aircav here...


Data for the DB601



Should be fairly self explanatory. For comparison with allied data, you will need to convert kg and grams into lbs, and metric horsepower (PS) into 'real' horsepower. Try this site:

Power Conversion

I also have some original German power curves for the DB60x series and the BMW801. Unfortunately they're to big for my scanner, and I haven't tapped them into Excel yet. Give me a shout if you need any specific performance points.

regards,
aircav

[HoHun]

Hi Joe,

>Also, does anyone have data on time between overhauls for these engines?

The report on the Fw 190A-1/2 prepared by Gordon Gollob on 06.01.1942 mentions an average of 25 hours for the BMW801C (C-1 and C-2 engines, I suppose) which the Luftwaffe considered entirely insufficient.

Gollob mentions that as long as the BMW801 "doesn't even reach 50 hours", it will be difficult to keep up the engine supply for more than one Fw 190 unit, so 50 hours still seemed to be a short lifespan by Luftwaffe standards.

Generally, I'd suspect that the German engines didn't last as long as British or American engines due to the lack of high-quality alloys. I can't prove that, though.

Somewhere, I read about the DB605 being license-produced in Sweden with the Swedish engines having a much longer time between overhaul than the German originals. Unfortunately, I don't recall the source.

With regard to this link:

http://www.enginehistory.org/

Could someone tell me whether this site is still up? I can't reach it, but I'm having problems reaching individual URLs for some reason - for example, I was unable to access this forum for weeks!

Regards,

Henning (HoHun)

[LLv34_Camouflage]

Originally posted by HoHun

With regard to this link:

http://www.enginehistory.org/

Could someone tell me whether this site is still up? I can't reach it, but I'm having problems reaching individual URLs for some reason - for example, I was unable to access this forum for weeks!
 

Works for me.

Camo

[joeblogs]

Wow that seems short.  I've seen some anecdotal evidence that for commercial applications US engines were getting many times more hours than that.  Still not much data to go on...

I found the engine history web seite a few weeks ago,  Very good.

Keep it coming!

-Blogs

Originally posted by HoHun
Hi Joe,

>Also, does anyone have data on time between overhauls for these engines?

The report on the Fw 190A-1/2 prepared by Gordon Gollob on 06.01.1942 mentions an average of 25 hours for the BMW801C (C-1 and C-2 engines, I suppose) which the Luftwaffe considered entirely insufficient.

Gollob mentions that as long as the BMW801 "doesn't even reach 50 hours", it will be difficult to keep up the engine supply for more than one Fw 190 unit, so 50 hours still seemed to be a short lifespan by Luftwaffe standards.

Generally, I'd suspect that the German engines didn't last as long as British or American engines due to the lack of high-quality alloys. I can't prove that, though.

Somewhere, I read about the DB605 being license-produced in Sweden with the Swedish engines having a much longer time between overhaul than the German originals. Unfortunately, I don't recall the source.

With regard to this link:

http://www.enginehistory.org/

Could someone tell me whether this site is still up? I can't reach it, but I'm having problems reaching individual URLs for some reason - for example, I was unable to access this forum for weeks!

Regards,

Henning (HoHun)

[HoHun]

Hi Joe,

>Wow that seems short.  I've seen some anecdotal evidence that for commercial applications US engines were getting many times more hours than that.  Still not much data to go on...

I believe commercial peace-time operations and post-war technology increased the time between overhaul by an order of magnitude or more.

In combat operations, I've read pilots' comments about the Allision V-1710 in the Pacific theatre (P-39 and P-40) reaching times of about 100 hours. This might have been a substandard value as the poor performance of these types apparently lead to the pilots using military power continuously.

Regards,

Henning (HoHun)

[HoHun]

Hi Camo,

>Works for me.

Thanks! I still can't reach it, so it looks as if I'm not done with fixing yet.

Regards,

Henning (HoHun)

[aircav]

Originally posted by HoHun


The report on the Fw 190A-1/2 prepared by Gordon Gollob on 06.01.1942 mentions an average of 25 hours for the BMW801C (C-1 and C-2 engines, I suppose) which the Luftwaffe considered entirely insufficient.

Gollob mentions that as long as the BMW801 "doesn't even reach 50 hours", it will be difficult to keep up the engine supply for more than one Fw 190 unit, so 50 hours still seemed to be a short lifespan by Luftwaffe standards.

Generally, I'd suspect that the German engines didn't last as long as British or American engines due to the lack of high-quality alloys. I can't prove that, though.

It's worth remembering that the 190 had a number of teething troubles (with the engine in particular) after entry into service. The fact that it's the A-1 and A-2 marks listed above suggests that the low time between overhauls may have been due to these problems. I would suggest that later marks were a good deal more reliable. Not uncommon with new engines, (cf the Sabre in the Typhoon ).

Having said that, I would tend to agree that allied engines may have been slightly more reliable. But that may just be personal bias.

[HoHun]

Hi Aircav,

>It's worth remembering that the 190 had a number of teething troubles (with the engine in particular) after entry into service.

You're right! I should have mentioned that this was a very important point in Gollob's report. He pointed out that as long as the teething troubles weren't solved, the 50% Me 109/Fw 190 production ratio didn't make sense with regard to the operational requirements.

Regards,

Henning (HoHun)

[joeblogs]

This from an air and space museum on DC3's still in the air:

"Even with this precaution, only 50 percent of the engines will run without help for 1,400 hours, the FAA's "Recommended Time Between Overhauls" for the R-1830."

-Wow

Originally posted by joeblogs
Great Stuff on the 601.  Thanks!

I would love to see some of these curves for the 801D.

Also, does anyone have data on time between overhauls for these engines?

-Blogs