Guide set No3

[kiwi]

Hi..
Been playing with diffrent weight top hats
to see what the diffrents is...

The top set ...has a top hat 20 grams lighter than standard set..
It gives a very smooth fireing cycle with little recoil..
shooting in the 600/650 fps range at a guess.."no crony"

Bottom set....Has a top hat 25 grams heavyer...lot more power than
the standard set.."centre"..Recoil is harsher but still not as bad as I thought
it would have been..still very smooth..think the tyvar sleeve's have a lot to do with that..
Power wise it hits dam hard..lot harder than with the standard guide set....
maybe shooting 950 fps..????

For the heavy set I had to move the spring 15mm rearwards..

[Bogey]

Pete,  not being an expert, what AG did you make these up for?   Kind of looks like it could be a Crosman.

Your work looks good.  How do those metal washers come into play?  

[kiwi]

Opps....
Its for a .177 kral underlever...CFX copy

Those 2 washers go at the spring ends to stop them digging into the
tyvar sleeves... The tyvar disc goes between the top hat & piston
to let the spring/top hat rotate...reduce friction..

Pete

[gamo2hammerli]

That's very good work making those top hats and "what you might call it" rear spring guides.  Fun to have tools for projects and experimentation.

[kiwi]

gamo2hammerli - 1/24/2010  12:27 PM

That's very good work making those top hats and "what you might call it" rear spring guides.  Fun to have tools for projects and experimentation.

just looking at them...it struck me theres 5 combinations of top hat weight & spring pre load....

Pete

[RedFeather]

If you are getting over 900 fps that is one smoking Kral! Be interesting to see how it holds up. After looking at the design and reading a lot of posts on the CFX and BSA, I'm inclined to think that breech doesn't like the higher pressure levels. Are you using the modified o-rings or stock? (Maybe the Kral actually has a superior breech, LOL! I DO like those Krals!)

[kiwi]

RedFeather - 1/24/2010  7:03 PM

If you are getting over 900 fps that is one smoking Kral!  Be interesting to see how it holds up.  After looking at the design and reading a lot of posts on the CFX and BSA, I'm inclined to think that breech doesn't like the higher pressure levels.  Are you using the modified o-rings or stock?  (Maybe the Kral actually has a superior breech, LOL!  I DO like those Krals!)

hi..I an't got a crony....its fair spitting the pellets out now...
950 ?..maybe wishful thinking..
It has the moded breech..

Pete