hw77 short stroke

[T 20]

And I thought I was being clever re-lubing and reassembling my 97k with Nicks short stroke this evening lol

I got a bit carried away.

[FPoole]

Just put an LGU piston at 195 grams and the shortened transfer port comp. tube in my TX. Uses the LGU seal and 82mm stroke. It has 35mm of preload and makes better than 12 ft. lbs. Funny that I tried it in another TX and it struggled to make 770 fps. I guess the spring in this gun is better, or just more efficient. The shot cycle is snappy, but not harsh and the accuracy has remained stellar.

[T 20]

I ended up saying sod it and made a new rotating piston weighing in at 219g with a 75mm stroke.

I used a TX latch rod and altered the back block and fitted a CD trigger unit

And here's the piston for anyone who's interested :-

http://s1138.photobucket.com/user/mi...tml?sort=3&o=0


And it seems to work very nicely after a bit of snagging.




All the best Mick

[NickG]

Nice job, though a little heavy for me , by around 80 grams !

[T 20]

Nice job, though a little heavy for me , by around 80 grams !

I did try it lighter, Nick, but couldn't get on with it --- this is my third piston inside a week.

First was standard piston shortstroked and O ringed.

Second piston was skirtless at 160g using a Weihrauch seal.

The one I have in now is just the skirtless piston with a skirt welded on.



All the best Mick

[seagate]

All fitted and fettled , very nice.