Originally Posted by HW55T
Your ventures into the polyorchidism nature of the D35 trigger mech will be of great interest Mick if it indeed has 3 balls
Fully greased up pictures will give a new meaning to air gun porn
And I think a parody of the song ( My chocolate salty balls ) will be a fitting end to this D35 project
All the best
John
Well I've just said sod the spring compressor, stripped the beast and managed to hold on to my balls.
Piston bore is 28mm
Piston stroke is 69mm
Piston weight is 237grams
Transfer port is 4mm X 19.2mm
Cocking arm free play = 3mm
Max stroke length = +10mm
The removed Spring appears to be the original factory Item of 33 coils of 3.1mm wire.
Other things of note is that the piston body is cheap and nasty and has two cocking lever slots --- 180 degrees out.
The compression part of the cylinder seems to be well made and all good but the open part of the cylinder has been distorted by the spot welds for the scope rail to the extent that the piston catches on them.
Something else which is a bit weird is that the dimensions I've taken from the D35 are pretty close to that of a HW35, in fact the transfer port is identical.
The only things that are slightly different are the swept volume, D35 = 42cc, HW35 = 46cc, and the D35 piston is lighter than the HW35 piston.
So my plan of attack stays the same, more stroke and sleeve the transfer port down, but now I'm thinking of adding some weight to the piston.
Weighing a Mercury piston earlier showed that they weigh in at 300grams at about the same bore and stroke as the D35 and I find that they make 12 easily on a shorter Spring, so the D35 piston's light weight could be the key to their lack of power ?
I'll have a little think on it now.
All the best Mick
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