Well a 100M is a good imagination but surely too dangerous, unless it has an on board computer that steers itself to the fish or we teether that to a mini cable like a submarine torpedo. So the spearo need to have a 3" LCD TV screen and a joy stick to drive it. Ha ha ha, just kidding. However, Tom Clancy will approve.
Griff,
True, a gun moving backwards waste energy. Dilema yes ?
Thrust against trust in opposite direction, good foundation.
One British airgun guy used this method to cancel recoil but since he is harnessing air pressure at both opposing pistons, he get recoiless action and improved power. Lucky guy.
I mean we will still use weight, no doubt but if possible not only weight......something else.
To me recoil starts to get offensive at 4 x 16mm shooting a 3/8" shaft with a single hand hold on a light gun. I am describing my Standard #4 Riffe. 4 band ....2 hand OK. 3 x 16mm, single hand very sweet. SA desire is to realy load the Frankegun, way above anything I ever handled, I can only imagine the overall weight might be in the 10kg region..to absorb recoil ......this is heavy and must be damn thick teak stock. All the weight dampening must be compensated with enough volume to float the gun without shaft. Totaly re-coiless I think still some light years away for a band gun but making it semi-recoiless and allow the gun to be lighter and thus slimmer for better swinging....might be possible. Difficult to engineer but as what the American President mentioned ( I forgot who ) about putting man on the moon :
"It is not easy but because it is difficult, so we must try it" ( well he said it in much better word & English ... I watched that in Discovery
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Anyway workable recoil absorber/reduction mechanism exist, it is just difficult to apply in such destructive enviroment of the sea water, not impossible but on the business point of view..... expensive !! But for one of a kind dream gun, if I have the budget and someone has the brain.........I personaly will do it because the fun is in the learning and what we can achieve, not merely for the power and shooting range. It is like a piece of personal art, beauty is in the eye of the beholder.
If you experience the Diana/RWS 54 airgun Murat mentioned, you will think what a piece of brilliant engineering their recoiless mechanism is. This is not new, Feinwerkbau of Germany had a similiar mechanism for their low power 10 meter Olympic airguns and they were the Olympic champion guns for so long untill single pump and scuba pneumatic came to the market. I never ripped open the two recoiless guns. The beauty of these 2 guns is that after each shot, you hear for a while some mechanical sound, the mechanism countering/removing the recoil. How ? I need US$400 to buy the Diana 54 ( if available in Jakarta, make that at least US$800 ) to rip it open and see how it does it.
But the Diana/RWS, also of Germany is the first manufacturer to be able to make it for higher power application, the time span was about more than 15 years between those two German designs. A few years back Air Arms of UK also made one but only to the stage of semi-recoiless, why half-done... I don't know, probably the Diana patent still valid.
This high power spring pistons I mentioned is low recoil compared to a 4 x 16mm speargun, they are only like 16mm x 2 but when shooters demand accuracy with high power to do 12 mm C-T-C at 30 meters even the slightest recoil is destructive. I mean the the beauty here is on the SOLUTION, this is what I am trying to emphasize and since I handled those guns............ I am very impressed for their R&D. Their solution doesn't appear without research.
This 54 without the recoiless mechanism ( they call it Diana 52 ) break the cross hair on even extremely robust telescopes, push regular scope mounts away from the rail even after using loc-tite, I mean they are just recoil makers. Their recoil is actualy a double recoil, the moment the piston push end at the compression chamber and when the piston rebounce ( this is well documented for spring piston ) . In a way quite similiar to a speargun, first recoil when the shaft launched out and second recoil when the all the rubbers hit home, all in micro seconds. I believe no one has documented this double recoil in a speargun but I honestly think that is what "could be possibly" happening on a band speargun. Speargun has so few "Einstein" working on them, I mean the engineers, not manufacturers. All the great legends have done their parts on how a speargun should be but we need more engineers to elevate it the a more state of the art shooting gear.
Simple test, take a catapult/sling shot, shoot empty, the Y stick will be propelled forward for a bit and a while. More diificult test is to make a dummy shaft with a special modified trigger that allows only the rubbers to be launched but no shaft along with it. Shoot the gun, I am sure the 4 x 16mm rubbers alone hitting the muzzle will cause quite a recoil. If we can study this well maybe we can avoid muzzle flip in a more elegant way than putting on mini wings/band elevator.
Don't we all wish a speargun so light, fast like a any 110cm Euro gun with 16mm x 2 , very mild recoil but deliver the punch and range like a Riffe Blue Water ( no wings please ). It is not entirely about the fish but when you ever handle a brute gun and somehow somebody can make a recoiless or semi-recoiless unit out of it................ you will fall in love for what it can do, not for what it can shoot. Don't we all love advance engineering that works ? Ha ha ha, I mean one that doesn't break when u r spearing.
I am not an engineer to this kind of level and I personaly do not know how to make one of this dream but I am sure it eventualy will head into that direction..when.... I don't know. We have achieved very respectable power level in a speargun, next step will be improving accuracy significantly and making it compact and so on.......... therefore one of the most obvious solution will be a more intelligent solution to get rid of recoil.
The more we urged people to design it, I guess the faster one will appear on the custom market. Is a business thing...demand...supply if feasible.
The only problem is that no one is asking it , everyone simply follow the rule that weight ballast is the only solution because it is the easiest solution.
Henry Ford built the first mass produced cars, all were black color those days black..why......... hell I don't know, I wasn't even born yet. They thought other color was not the norm, guess what happened then ?
Sorry Griff, my capacity is only demanding for it but not to the stage of how to build it. BTW, I just had a long though about the reverse (rear ) rubber position to supposedly counter recoil. I think the Riffe Metal Tech will be a good platform for the modification. It has the strength to be drilled anyhow, anywhere for the modification. I don't have the patience to build from zero. If the enclosed track is released, I will start then...for fun.
Thanks Griff and Murat for ur patience and time.
Hmmm speargun...speargun... very addictive.
Cheers
IYA