M-82 / M-105 engines

[SaQSoN]

Originally Posted by JtD

The technical descriptions of these carburettors, made no statement regarding the working principle (float or no float).

K-25-4 family was all float, that's for sure.

[JG52Karaya]

Thanks everybody for your constructive posts,

I still have one more question, namely what the situation was on the AM-35/-38 engine family used on the MiG-3 and IL-2. Did these have float, floatless or injection type carbs!?

[SaQSoN]

Originally Posted by JG52Karaya

I still have one more question, namely what the situation was on the AM-35/-38 engine family used on the MiG-3 and IL-2. Did these have float, floatless or injection type carbs!?

Floatless carb.

[bugmenot]

Hi SaQSoN, can you translate this?

Решением ЦК ВКП(б) и СНК СССР от 26 декабря 1940 г. завод № 24 получил указание с апреля 1941 г. выпускать моторы АМ-35А с карбюраторами беспоплавкового типа. Такие карбюраторы были изготовлены, проверены в наземных и летных условиях. Но моторы с беспоплавковыми карбюраторами не были взаимозаменяемыми с обычными AM—35A, внедрение их требовало переделки некоторых узлов двигателя, а также посадочных узлов и капотов самого самолета. Несмотря на определенные преимущества беспоплавковых карбюраторов в силу отмеченных причин они не были внедрены в массовую серию, но более десятка машин с такими карбюраторами все же были изготовлены и сданы в строевые части [22].

http://wunderwaffe.narod.ru/WeaponBook/Avia/Mig3/04.htm

[SaQSoN]

Originally Posted by bugmenot

Hi SaQSoN, can you translate this?

In short words, it says, that at 26 Dec. 1940, Soviet government issued an order to produce AM-35 engines with floatless carbs only. However, this order was not obeyed at full. Only some engines were produced with such carbs, while most were equipped with the float carbs.

This made me search more thoroughly through my vast reference library and I actually found there an original manuals for AM-38 and AM-35 engines. According to them, the engine was equipped with 4 float carburettors, installed after the supercharger, each carb. serving 3 cylinders. This carburettors were equipped with special devices, preventing fuel overflow at a negative G, which made those engine fully aerobatic (according to the said manual).