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The problem in Russia was usually the incredibly abrasive dust that the quick-build airfields churned up. Exactly the same happened to Hurricanes operated there, the cylinders were worn out after a tiny time interval, and the service personnel there got used to quick fix procedures like replating bores because they`d never get new liners as spare parts in time.I have been researching Soviet P-39 and P-40's. One curious thing I came across is they had much shorter engine life.
"It is true that because of our unforeseen operating regime the engines had a limit of about 50 hours, and often less. Normally an engine might last 35 hours and then it was replaced."
Anyone know how long the Allison lasted in American flown planes?
Source
From various sources it seems the Soviets were not using as good fuel, going higher rpm, and had lower quality oil.
Ya that's what I read in various sources. They must have been asking for a lot of replacement Allisons.One of my books by a Russian author said Russian pilots flew at full throttle rather than cruise settings. I have wondered about engine life.
If that is true, and I am not saying that it is not, it does help explain a few thing though.I was told that when the Russian sources are interpreted as 'full throttle' it means full rated power or what the US usually labeled Normal power.
That seems a very strange claim, fuel consumption would be vastly higher, how did they fly anywhere ?One of my books by a Russian author said Russian pilots flew at full throttle rather than cruise settings. I have wondered about engine life.
I have read something similar about the Russian pilots and high power settings. My interpretation is that they operated at high power settings (high speed) in the high threat areas (places they thought they could be attacked) to make any attempted intercepts more difficult. If you are at high or top speed, and your opponent is trying to intercept you, he either needs to be a good bit faster and or run the perfect pursuit curve if he intends to shoot you down. You give him the the smallest window of intercept possible by going as fast as you can.That seems a very strange claim, fuel consumption would be vastly higher, how did they fly anywhere ?
All pilots abused the boost settings when they were in combat, this happened all the time in the Battle of Britain for example,
but I cant believe Russian pilots just stuck everything on full after take off and flew around all day like that, why would you,
you`d know you are decreasing your chances of coming home if the engine packs in.
Interestingly the 200 odd Tomahawks the British sent them only came with 20 spare engines.... however later shipments came with about 25% plus spares (US found that 10% wasn't anywhere near enough - even though they were told early that it wasn't)). MakerDue can you drop me a PM with what you are actually researching I may have some data for youYa that's what I read in various sources. They must have been asking for a lot of replacement Allisons.
Attached is a copy of a page from wartime USAAF Tech Order 00-25-4, Engine Time Between Overhaul.Interestingly the 200 odd Tomahawks the British sent them only came with 20 spare engines.... however later shipments came with about 25% plus spares (US found that 10% wasn't anywhere near enough - even though they were told early that it wasn't)). MakerDue can you drop me a PM with what you are actually researching I may have some data for you
Buz
Very nice. What was the date on thath tech order, Dan?Attached is a copy of a page from wartime USAAF Tech Order 00-25-4, Engine Time Between Overhaul.
The V-1710 was approved for 500 hours, with one extension.
Certainly, environmental and operational factors would affect the lifetime of any specific engine.
Dan
TO 00-25-4, November 13, 1943Very nice. What was the date on thath tech order, Dan?
Seems USAAF have way longer lifespans, thanks for the info!Attached is a copy of a page from wartime USAAF Tech Order 00-25-4, Engine Time Between Overhaul.
The V-1710 was approved for 500 hours, with one extension.
Certainly, environmental and operational factors would affect the lifetime of any specific engine.
Dan