First proper test of the chamber. And housing pressure test.
The housing will take 300 psi or 20 bar without implosion. Im not sure what the final pressure was because I didn’t have a data logging pressure sensor. But More than 200 metre should be plenty for the ROV.
I would still like to test- the cylindrical camera housing, floats, copper tubing and fittings…
And find a more reliable way of making the through hulls.
Just done the first test on the hyperbaric test chamber. Its looking promising still to: paint, attach high pressure pump and install lights, devise hold down rig for test item….
Assembled the five printprops.They are looking great.
And working on Buck converter for tether power. I am thinking about using the lm2596s with external fets- lots of things to learn. I might even make an Arduino shield to -logic shift for Beaglebone black, current sense, servo outputs and sensor connections…
Could a circuit like this work? Using a Switch Mode DCDC step down converter (48-24v) to 12v. Output from the transformer charge the whole bank, or individual sell groups. Effectively using the load as balancing resistors. FETS on the output of the transformer directly power the load or charge week groups. Low speed switching to maintain battery voltage????
Also laser cut ends for the hyperbaric test chamber arrived- I will try to stick them to the cylinder
this week. And do a few more videos squashing stuff.
Battery testing we have collected and tested 60+ cells. About 2/3 are ok and will store a reasonable amount of power. So we still need a few more to make the 45 cell pack.
Planned construction of a hyperbaric test chamber. To test the ROV hull. It will pressurise to 40 bar or 400 metre equivalent depth. It will be interesting to see what happens when the pressure outside the ROV exceeds the gas compensated pressure inside and test the failure pressure of hull components.
