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pointy

Member Since 05 Aug 2011
Offline Last Active Aug 20 2015 05:44 AM
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#364368 how to DIY strobe floats from styrofoam ?

Posted by pointy on 18 August 2015 - 03:22 AM

You can make floats using divinycell as suggested however as the material gets brittle you will need to finish it with epoxy glue all over to seal it. One of the other challenges is to make a shape that goes around the arms. Unless you have good cutting tools and a lathe it won't be possible so you will need cable tyre to fix it. It works fine until 40 meters with minimal buoyancy loss. I wrote a comprehensive comparison of commercially available float systems here

 

Divinycell (high density PVC foam) is easy to shape with basic tools - no need for a lathe. You can also glue pieces together, so there is no need for cable ties. I agree that it has a soft surface that needs to be protected. Rather than using epoxy, I sprayed my floats with a heavy coating of "Rustoleum Leak Seal" which gave a tough flexible finish. After 60 dives, often below 40 meters, the surface looks the same. With floats that were formed by glueing together pieces of foam, I never noticed a loss of buoyancy at depth. I hope my floats on a string will work as well. 

 

I would like to encourage DIY types to forge ahead.

 

John McCracken




#332537 Suspension floatation for housing

Posted by pointy on 08 June 2013 - 05:20 AM

Floatation from above the rig works better for me than having bulky floats on short strobe arms which interfered with positioning. Now, even when the strobes are positioned low, the floatation is above the camera, so it is easier to hold the rig in a fairly upright position.

 

My camera is now neutrally buoyant and well balanced from side to side. It's nice to let go of the camera and watch it remain at your side, like a loyal dog. I think a neutral camera could also provide a useful visual reference, to help a diver maintain a constant depth, when in the blue.

 

The Flickr link below shows how they are attached. If you click on any of the 4 photos you can read the notes.

 

 

John McCracken




#328581 Cheap vacuum indicator for "Housing Sentry"

Posted by pointy on 25 March 2013 - 10:48 AM

Hello John,

 

Could you put the link to the chinese small digital barometer? I was also looking for one small enough...

Hello David,

 

Sure, here is the link to the one I ordered:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=251147030734 

 

You could Google "small barometer" or "small altimeter". If you're willing to spend a bit more money, you might find something better. 

 

John