• Welcome to the DeeperBlue.com Forums, the largest online community dedicated to Freediving, Scuba Diving and Spearfishing. To gain full access to the DeeperBlue.com Forums you must register for a free account. As a registered member you will be able to:

    • Join over 44,280+ fellow diving enthusiasts from around the world on this forum
    • Participate in and browse from over 516,210+ posts.
    • Communicate privately with other divers from around the world.
    • Post your own photos or view from 7,441+ user submitted images.
    • All this and much more...

    You can gain access to all this absolutely free when you register for an account, so sign up today!

Pneumatic Speargun Compression Ratio

Thread Status: Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.
popgun pete

popgun pete

Well-Known Member
Jul 30, 2008
This is a Nemrod "Fragata" from the early sixties and is a typical high compression ratio, low start pressure gun. On these guns the spear is caught by a trigger mechanism in the grip handle and nothing is inside the rear tank section but compressed air. In a sense the gun is not unlike a “Sten” with the outer tank removed and a small tank installed on the rear end of the inner barrel. Nemrod’s next largest gun was the “Crucero” with a surcompressor on the rear tank operated by an external pivoting lever, however the “Fragata” would have been a less troublesome gun to use as sand getting in the sliding tank mechanism was always a possibility if you dropped the “Crucero” on a sandy bottom.
DeeperBlue.com - The Worlds Largest Community Dedicated To Freediving, Scuba Diving and Spearfishing


ISSN 1469-865X | Copyright © 1996 - 2022 deeperblue.net limited.

DeeperBlue.com is the World's Largest Community dedicated to Freediving, Scuba Diving, Spearfishing and Diving Travel.

We've been dedicated to bringing you the freshest news, features and discussions from around the underwater world since 1996.