Quote:
Originally Posted by KenTsui
I am actually interested to see what you did with the hop-up. This is a project I've put on the back-burner but before I did I was not happy with the stock unit.
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I want to show few photos of my own project. Upper gearbox part and hop-up chamber.
Upper gearbox part. There is d16t aluminum alloy, made by cnc machine tool. Front side is thickened by 3mm. The groove for the cylinder is made for bore-up set - 70mm. External dimensions of a detail correspond to the basic sizes.
Upper gearbox part with internal parts
Hop-up chamber. D16T aluminum alloy. There is the ledge for an insert in gearbox, the hop-up chamber is executed so air nozle it was possible to establish less then basic 29mm, i set nozle for G36 (25.5 - 26mm).
In my basic hop-up the part for connection with gearbox is removed, as a result of the first experiments =)
The entrance opening for a platform of giving of bbs ("square platform")is made with the minimum admission by the sizes. As a result it turned out to avoid leak of air in this connection.
As it looks in assembled form. There is the first version of upper gearbox.
There is a link to my "video" (may 2015) with firing MG42 with stock motor. I changed my M135 spring to M170 in video. I shoot more than 2000 bb during test (considering out of video tests). It was fine work during short turns and long lines of shots, no troubleshoting with upper gearbox part after test and through test. Sorry for non-english video, i want to make a copy with english text.
https://www.youtube.com/watch?v=yqCO...tailpage#t=158
I would like to answer any question. If someone want the same stuff to have in own AGM MG42, I can make the offer by rules of this forum.
With best regard, Siegfried
Belarus, Minsk.