brabzzz 0 #1 February 1, 2006 http://www.my-skyworld.de/catalog/product_info.php?cPath=63&products_id=1066 Has anyone got one - and more to the point, can anyone be arsed to measure/remember the diameter of the hole needed through the helmet? I ask because I have Hawkeye (+ Hawkeye chincup), which, whilst similar to a Bonehead, isn't. The ratchets are on the helmet, not the chin-cup. The plan is to move 1 ratchet to the cup, the 'tongue' to the lid and treat it like a b/Head...but I'm curious as to whether they are similar enough for it to be the easiest option! Or has anyone actually tried this? Cheers, Mike --------------------------------------- Ex-University of Bristol Skydiving Club www.skydivebristoluni.com Quote Share this post Link to post Share on other sites
outlawphx 1 #2 February 1, 2006 I have one, and the bolt is pretty thin. I don't have it with me at work to measure it though, but I'll try to remember to check when I get home. You can always give Linda at bonehead a call. Quote Share this post Link to post Share on other sites
brabzzz 0 #3 February 1, 2006 Cheers - 'pretty thin' is a good! Ringing/emailing bonehead would be the easiest way, but given everyone around me thinks i'm working (), doing it the longer way is more fun - and likely to get some contrasting opinions and advice thrown in too! --------------------------------------- Ex-University of Bristol Skydiving Club www.skydivebristoluni.com Quote Share this post Link to post Share on other sites
IanHarrop 41 #4 February 1, 2006 You can pick up the parts to do this at Home Depot for less than $5. I did. Found the instructions and parts list here on this forum some time in the past year. Looking at the photo in the advertisment it looks like the same thing."Where troubles melt like lemon drops, away above the chimney tops, that's where you'll find me" Dorothy Quote Share this post Link to post Share on other sites
PhreeZone 20 #5 February 1, 2006 Look up a post by me about 3 years ago... Hell, I'll save you the effort. http://www.dropzone.com/cgi-bin/forum/gforum.cgi?post=273576#273576 Hint, I made the post about a year or more before it appeared on Boneheads website. My cost, less then $2 from a hardware store, Bonehead's cost.. about 7 -10 times that Yesterday is history And tomorrow is a mystery Parachutemanuals.com Quote Share this post Link to post Share on other sites
brabzzz 0 #6 February 1, 2006 Cool, cheers for that - looks simple and effective! I'll go wander round some hardware stores at the weekend. My only worry is that you yanks have hardass hardware stores, whilst we have B&Q/Homebase/Wilkos - which might sell potted plants/paint/bath taps - but not little coil springs! Still, I'll see how it goes! edit: out of curiosity, would the spring not be better off on the outside (under the strap)? That way it would not need to push against padding/jaw? --------------------------------------- Ex-University of Bristol Skydiving Club www.skydivebristoluni.com Quote Share this post Link to post Share on other sites
brabzzz 0 #7 February 11, 2006 Random update, if anyones after the springs, take apart the office stapler. After a quick tour of my workplace, I now have half a dozen different springs at least one of which should work! --------------------------------------- Ex-University of Bristol Skydiving Club www.skydivebristoluni.com Quote Share this post Link to post Share on other sites
jont 0 #8 February 11, 2006 I'll just say this. Fit your bonehead cutaway kit. Then put on your helmet, sit down on the floor, and get a friend to grab the helmet and pull upwards, to simulate some loading on the system, such as you might get in the event of a line snarl. Now try and operate the cutaway. I tried this exercise. I promptly removed the bonehead cutaway kit, and replaced it with a 2K one, that incorporates a 2-ring. my 2p. Jon T Quote Share this post Link to post Share on other sites
brabzzz 0 #9 February 11, 2006 I can see the potential for a friction induced head wrenching, but: If the clevis pin is filed/sanded down until the 'hole for the split pin' is literally a under millimeter from the end, the situation is a bit better. The pull force on the split pin should be largly independent of the load on the helmet, and even if friction due to tension prevents the pin getting pulled in by the spring, a yank on the chin-cup strap certainly will. However, point taken - if I'm even the slightest bit concerned/unsatisfied with it, I'll pursue other options before jumping it! Mike --------------------------------------- Ex-University of Bristol Skydiving Club www.skydivebristoluni.com Quote Share this post Link to post Share on other sites
Isenring 0 #10 March 5, 2006 Quotehttp://www.my-skyworld.de/catalog/product_info.php?cPath=63&products_id=1066 Has anyone got one - and more to the point, can anyone be arsed to measure/remember the diameter of the hole needed through the helmet? I ask because I have Hawkeye (+ Hawkeye chincup), which, whilst similar to a Bonehead, isn't. The ratchets are on the helmet, not the chin-cup. The plan is to move 1 ratchet to the cup, the 'tongue' to the lid and treat it like a b/Head...but I'm curious as to whether they are similar enough for it to be the easiest option! Or has anyone actually tried this? Cheers, Mike Hi Mike Short after following this link to the helmet-cut-away I have ordered one. Got it soon after payment --> nice contat. For my bonehead it was a question of 5 minutes to mount this system. I would really recommend it. The mounting instructions are imho not too good. You need some logic thinking of what will happen when you pull the cut-way-handle. Anyway, its a good solution and a must for people as me having a sidemounted PC2 and topmounted EOS350 Quote Share this post Link to post Share on other sites
pbla4024 0 #11 March 5, 2006 I used one, but I replaced it by cutaway kit from Airgun. http://airgun.cz/eng/detail.php?id=p005 Much better handle. Fido Quote Share this post Link to post Share on other sites
PhreeZone 20 #12 March 5, 2006 Someone remind me in the future to patent any more ideas I end up having... Yesterday is history And tomorrow is a mystery Parachutemanuals.com Quote Share this post Link to post Share on other sites
brabzzz 0 #13 March 6, 2006 Ahhh nooooo! I wish I'd known about that site! £12, Czech (yay!) and simple. I've gone for a 2k cutaway. Arguably the 'best', though not exactly the cheapest! http://www.2kcomposites.com/html/cutaway.html --------------------------------------- Ex-University of Bristol Skydiving Club www.skydivebristoluni.com Quote Share this post Link to post Share on other sites
