Unclejake Posted January 17, 2011 Share Posted January 17, 2011 Fast135 donated a motorcycle twist throttle for this project last year and now it starts in earnest. The device will carry a breath hold diver to depth at great speed. The sled will run down a fixed rope and the throttle and brake will use friction on that fixed rope for descent speed control. The engine is the most powerful on earth. Gravity. This is the beginning. More photos to come as I work through the plan. The spine of the sled Here is the throttle assembly. It is a stainless plumbing ball valve Quote Link to comment Share on other sites More sharing options...
ThePog Posted January 17, 2011 Share Posted January 17, 2011 You have obviously watched 'into the blue' one too many times... Quote Link to comment Share on other sites More sharing options...
KKtrips Posted January 17, 2011 Share Posted January 17, 2011 Are the holes to dispel any air that will create boyuancy? (sp?) Quote Link to comment Share on other sites More sharing options...
Poo Posted January 17, 2011 Share Posted January 17, 2011 i cant wait till this thing helps smash some world records and I can say 'thats my old/new throttle' make it happen UJ! Quote Link to comment Share on other sites More sharing options...
ryanfels Posted January 17, 2011 Share Posted January 17, 2011 Are the holes to dispel any air that will create boyuancy? (sp?) Lol this is UJ we are talking about here Quote Link to comment Share on other sites More sharing options...
KKtrips Posted January 17, 2011 Share Posted January 17, 2011 Yeah I know - but chances are you want weight on this bad boy to descend quicker.. Quote Link to comment Share on other sites More sharing options...
Unclejake Posted January 17, 2011 Author Share Posted January 17, 2011 You have obviously watched 'into the blue' one too many times... Jessica Alba had sweet, sweet body in that (crap) movie and I would have done her for free ................ but perhaps you mean a much older movie - The Big Blue?KKK - you have guessed well. The holes are to vent air and to drain water out when retrieving the sled. Quote Link to comment Share on other sites More sharing options...
ryanfels Posted January 17, 2011 Share Posted January 17, 2011 Will that braking system damage the rope to much? Quote Link to comment Share on other sites More sharing options...
Unclejake Posted January 17, 2011 Author Share Posted January 17, 2011 As it is the ball valve will bugger the rope pretty fast. The plan is to insert a bronze (or other soft metal) insert inside the ball and to flare it out to minimise rope damage. The retail cost of the rope is well over $1k so we want it to last a while, but reality is that the sled won't get used much. I am figuring on 200 deep descents in ten years There is lots of room inside the ball for an insert Quote Link to comment Share on other sites More sharing options...
xsspeed Posted January 17, 2011 Share Posted January 17, 2011 how much weight is on the sled UJ? what is expected rate of decent? Quote Link to comment Share on other sites More sharing options...
Unclejake Posted January 17, 2011 Author Share Posted January 17, 2011 The sled will need ballast added to it by way of weight lifting weights. We probably want it to finish around 20-28kgs. Descent rate should be a mimimun of two meters per second - which is about twice as fast as a diver would normally swim Quote Link to comment Share on other sites More sharing options...
xsspeed Posted January 18, 2011 Share Posted January 18, 2011 Does the insert to the ball valve need to be metal? plastic alternatives? Getting the plastic to 'stick' may be an issue I suppose, and if closed with force could break/ I am probably going through things you have already though of. If you don't mind can you post up what exactly the rules are (or a link to them) for Dave's dive? Quote Link to comment Share on other sites More sharing options...
Unclejake Posted January 18, 2011 Author Share Posted January 18, 2011 There are no rules for this dive. The sled will be used to train Dave's ears for equalizing below a certain depth. The sled will give him almost an extra minute to mess around with ears and such. Bonding nylon to the inside of the ball is what worried me. An interference fit with something metal seems safest - but I have not looked into it properly yet Quote Link to comment Share on other sites More sharing options...
xsspeed Posted January 18, 2011 Share Posted January 18, 2011 Ah I see, so sled is for training at depth, (pressures etc) and the WR attempt is a free (unassisted) dive. Quote Link to comment Share on other sites More sharing options...
ThePog Posted January 18, 2011 Share Posted January 18, 2011 but perhaps you mean a much older movie - The Big Blue? Thats the one, watched it recently/senility is obviously been setting in Quote Link to comment Share on other sites More sharing options...
nvmyvl Posted January 19, 2011 Share Posted January 19, 2011 There are no rules for this dive. The sled will be used to train Dave's ears for equalizing below a certain depth. The sled will give him almost an extra minute to mess around with ears and such.Bonding nylon to the inside of the ball is what worried me. An interference fit with something metal seems safest - but I have not looked into it properly yet I can supply nylon, uhmwpe, pvc, acrylic, acetal, polyprop, teflon, peek, nylon GSM, nylon LF, PETP in rod form. just let me know if you want anything and its yours Quote Link to comment Share on other sites More sharing options...
DodgySam Posted January 19, 2011 Share Posted January 19, 2011 for the braking/throttle have you thought about a cam type system? Im thinking about a device we used in rock climbing called a shunt. basically it just curves the rope round a cam and while you grip the handle it free runs the rope...the more you let the handle loose it slows you down to a stop. Really simple device and designed to be used on climbing ropes so very rope friendly. Will find pics for you. edit...here... If it is the sort of thing that may work PM me and I will post my shunt down for you to test/try. Quote Link to comment Share on other sites More sharing options...
Simon Posted January 19, 2011 Share Posted January 19, 2011 Will find pics for you. That looks kind of complicated^ I like the cam idea. So simple and nothing to go wrong or get tangled. I could probably get my boss to plasma out a cam next time he cuts some 16mm steel. But I see you don't want steel. Quote Link to comment Share on other sites More sharing options...
Unclejake Posted January 19, 2011 Author Share Posted January 19, 2011 can supply nylon, uhmwpe, pvc, acrylic, acetal, polyprop, teflon, peek, nylon GSM, nylon LF, PETP in rod form. just let me know if you want anything and its yours Seriously - I honestly don't know what most of that stuff even is. I think I like you. A great deal!Dosgysam - yes mate. A cam thing is the plan. More on that soon.\ Simon - I will explain it all in the next few days but I think I have a plan Tonight I saw Cam/Paul, Flange and Gemma and while ignoring them I turned up some alloy bits to the sound of KKK raging at something next door. I LOLed. He will too by now. Quote Link to comment Share on other sites More sharing options...
KKtrips Posted January 19, 2011 Share Posted January 19, 2011 Somewhat LOLing/somewhat still pumping copious blood through my eyeballs.. was fixing hydraulics on Citroen which was insanely infuriating and dropped my fucking torch in the bucket of LHM - I think tomorrow I laugh - tonight I stab anyone within arms reach.. Quote Link to comment Share on other sites More sharing options...
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