I recently got an HW90 Theoben. At 26 Bar pre-charge (377 psi) it's a bloody violent beast. When that gas strut unloads you know it and so does whatever I'm pointing it at. Anyway I do like the gas strut. There is no break in period, It shoots the same right out of the box as it does after a few thousand rounds. I haven't had it in the cold ( below freezing) yet. I know that molecules do condense in frigid conditions and seals do get harder when frozen, so there may be some kind of net negative in freezing weather as there are with springs and greases.
Interestingly some engineers will insist that a steel spring, properly heat treated and made from the correct alloy won't experience fatigue under extended compression. I know that good springs do fatigue having spent years as a machinist/tool maker I've replaced a very great many exhausted and expensive springs on die sets. But they last for many hundreds of thousands of cycles.
Cliff, which caliber HW90 do you have?
Springers (both types) compress the air so rapidly that they generate tremendous, though equally temporary, high temperatures. This burns off any combustible vapors, adding 100+ fps to the shot. If you were to compress the air past a valve, it would rapidly cool and lose that added boost
QuoteCliff, which caliber HW90 do you have?I got it in .177 I like the faster flight of the .177 over the .22. Kills everything I point it at.
Does anyone know the reason why Diana doesn't offer any NP rifles?
for now i will wait till they perfect nitro pistons . 1 was enough for me . but after a few years they will have it working nicely and then i will pounce on 1 .
For what it's worth and as I see it, the gas rams are the power plant of the future. They are being improved and perfected more and more as time progresses.At the same time, I believe the springers will be around for a long time, are dependable and will always have their place, at least well into the future.CDT