Originally Posted by Talbot
I question your decision to trust your life to a last ditch safety system, that is not only an unknown design, but also unknown material. IMHO not a good place to be looking for savings - next you will be making your own liferaft
Originally Posted by Whimsical
Given a little research
into construction materials and method I think it is a quite reasonable undertaking especially as the originals are only the same material using the same low tech construction - sewing.
A life raft on the other hand has specialised methods that can't be readily reproduced at home.
And beside Wotname is an Aussie and we have an inbuilt gene that tends to compell us to make something
Hmm... didn't take too long for some thread drift
Interesting comment Mr Talbot and while Mike has answered it succinctly, I wish to expand on his answer (as is my want
1. Look at this the other way, why trust your life on something that others have made, especially an item that is not built to an "approved standard".
I am not saying that some else's item is bad, but if it is not built to a standard, then one still has to assess it's design and "build quality" to see if it appropriate to put your life on. If it is built to an "approved standard" then a reading of that standard should still be undertaken.
2. There is an assumption that DIY is for savings rather than say knowing the quality of the final product or for reasons alluded to by Mike (above). And yes, savings do come into the picture but only after the other aspects are addressed.
3. Unknow design !!!. The commerical para-anchors are hardly high tech items. Basic parachute design was pretty well perfected in the 1940's during WW2 and built on in the 1950's in rocket developement.
Again as Mike states, sewing is not a complex concept
. I work with people who are approved seat belt and cargo netting suppliers. While they know their trade
, they don't need PHD's in applied physics. Get the basic information on thread selection, needle size, stitch style, length and tension and that is pretty much it.
4. Unknow material. Well maybe, but already 99% of available fabrics have been ruled out and even this thread is part of refinning the selection. If I believe I can't confirm the final choice of fabric as being suitable, then the project
is dead in the water
5. Last ditch safety system. Not really, IMHO, the para-anchor on my vessel is part of a complete system enabling the vessel to heave to under expected sailing conditions and will be trialled, tested and used as such. Such use will enable it's suitability to be determined (or extrapolated) for more severe conditions.
6. My (almost) last ditch safety system is the integrity of the hull
. I am trusting my life to this system every time I cut a piece of wood, mix epoxy
, fit a through hull
, add a bulkhead, replace a chainplate, make a replacement cabin
window or whatever. It is not a long leap to trusting one's ability to research and construct a para-anchor.
7. The true last ditch safety is stepping up into the liferaft
and I am not filled with confidence what is available on that score but as Mike state's, these are items that don't lend themselves to DIY.