BSA Supersport Custom Lightning .25 ~ BSA Mercury Challenger Lightning .177 ~ 2 x BSA Mercury S .22 ~ BSA Airsporter S carbine .22 ~ BSA Airsporter RB2 carbine .22 ~ 2 x BSA Challenger .22 ~ Air Arms Prosport .177 ~ Air Arms Combat .22.
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Same here Pete.Originally Posted by look no hands
Founder & ex secretary of Rivington Riflemen.
www.rivington-riflemen.uk
Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
Like this :-
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THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
NEXT EVENT :- May 2025.........BOING!!
Yes Mark,
I'll be using a MK3TX latchrod and the top sear will be altered like this :-
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That's not really a benefit, Tone, it just comes as a consequence of the piston dimensions, the new piston has a 21mm ID so cutting down my choice of springs.
Hopefully there are a few benefits to the new piston though. :-
The tail of the original 35 piston is soft and tends to score on the cylinder, the tail of the new one has a bearing so no scoring and minimal lubrication required.
There is no need to mess about with piston liners on the new piston as it has no cocking lever slot.
With the new piston being able to rotate on firing this should take a bit of pressure off the top hat and guide to provide rotation.
The new piston is coming in at about 10 grams lighter than the old one and there is still room to reduce that even more if needs be --- don't forget this piston is just a quick lash up to see if it's worth doing properly, hence the use of LGV bearings as I had them to hand.
With the new piston having a screw in latchrod the stroke can be easily altered by changing the latchrod length.
All the best Mick
Going to be interesting, Mick.
Sure you'll be okay for springs too; plenty out there with 21mm and less OD.
THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
NEXT EVENT :- May 2025.........BOING!!
Checking back through my photo albums it seems I'm following in Wonky Donky's footsteps here as he made a similar rotating piston for a HW80 :-
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http://www.airgunbbs.com/showthread....59#post6308359
Last edited by T 20; 15-11-2018 at 11:13 AM.
Oops!
It appears that I inadvertently boinged that thread back up. Very nice read.
Hope Dave is keeping well.
THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
NEXT EVENT :- May 2025.........BOING!!
Me Dave?
Yes I'm good Thanks.
I've fitted my Tinbum kit and the rifle is now making 10.6ft/lb with H&N FTT @14.76grain
the fps were, for 12 shots
592.2
582.8
575.6
572.6
568.7
569.6
566.7
566.7
564.8
563.8
566.7
566.7
there is a bout 2" of preload on the spring. It was quite a job to get it all together again.
After we (me and the old man) got it back together, the old man thought that the butt pad for fishing would have probably made the assembly easier.
Quick question
Would 2 people using the same rifle have a different zero?
We are both grouping tight over 20m but my shots seem to be high and to the right (think 1 0'clock) compared to the old man.
Good news is that things are hotting up in the garden plinking cup he won this weekend, I won the first week we shot.
I'm now looking for a HW98 or a HW97KT to joint the HW35.
With a view to getting it professionally tuned to see what the difference is.
And maybe a HW100 but that looks like I'll need a lot of additional kit, bottles etc