|13th May 2014 04:28 PM|
OK, I've looked at both links and for most booms it seems simple enough, but I have 2 of the Gulf Tech VMax FW booms I want to cut, which have a very wide tail on 'em.
Any thoughts on how many cm I can cut off these and still have anything usable?
|27th February 2014 11:36 PM|
yeah, i'm with mark...from what you say, you want to cut the tail piece by 20cm, but all that will do is give you a boom of 200-260 instead of 200-280
you need to cut the outer tubes of the main piece to get a shorter boom
|27th February 2014 06:13 PM|
Ok, so you want too cut the u shaped section shorter? That would make the boom less stiff and would not make the boom shorter. No benefit.
Sorry if I'm misunderstanding you.
|27th February 2014 03:12 PM|
Cutting a boom
Any adjustable boom assembly is made of two telescopic U-shaped sections sliding into one another: one ( the outer one) ends with the clamp which connects to the mast and has a retaining ( or locking) clip at the end of each of the two arms. Then there is another smaller diameter section, also ending with two arms ( with holes) each one sliding into the arms of the main section.This is the adjustable or extensible part, which I call " inner tube" and is fully removable".
The point I was trying to make is that, if I slide out the extensible part, I can't see anything at the end of the two arms ( except perhaps a protective rubber or plastic trim around it ) that prevents me from cutting the arms to the required length, repositioning the above plastic trims and then re-assembling the boom. There is no other mechanism, clip or other at the ends of this inner section, requiring re-adjustments or re-working after cutting the arms, as would be the case if I were to cut the main outer section, because this has, indeed, the locking clips. But why would I have to cut this section?
Perhaps, again, there is something I am missing. Any comments?
|27th February 2014 12:16 AM|
Not sure what you mean by "inner tube"' but if you are shortening a boom, you will be cutting the arms shorter, this means you will need two new clip assemblies. Sometimes you can get the old clips off, but it's usually better to make sure that you have a pair off spar clips. Unless it's a Fiberspar boom, you would need to drill new holes for the located pins.
|26th February 2014 05:08 PM|
Cutting a carbon boom
I may have to cut, too, a a 220-280 carbon boom, but only by 20 cm at most to fit a 7.5 sail and a 6.5 sail . As I see it, it will be the inner sleeve to be cut, at the very end , so I cannot see where the problem is with the fitting of the double push pin. This fitting and the retaining clip are on the outer tube, which is not the one to be cut. Cutting 20 cm from the end of the inner sleeve , even if it means eliminating a few holes, won't be a problem to me because I am getting this carbon boom as a special deal, but I'll NEVER EVER need to use it to the maximum extension of 280 cm.
Maybe there is something I am missing. Any comments?
|28th March 2011 09:56 AM|
As per a private email to Carlos the mould/jig was to translate the position of the original holes perfectly. Alternatively, the holes could be marked out carefully and drilled using a drill press to stop the drill
"wandering" off centre.
X9 Tail Tube Sizing:
I have a 180 and 200 X9 also and checked the lengths of the large diameter end of the boom(that sleeves the tail) and found the 180 & 200 are from the same tooling and the 225 & 260 are from the same tooling( as far as the start of the larger diameter tail goes). Or to put it another way the 200 has about 80cm of tail tube( and can be cut down to the 180) and the 260 has 100cm (and can be cut down to 225). I ended up cutting a 260 down to 230 to allow for a range of adjustment on a 9.5.
|26th March 2011 08:18 AM|
|Unregistered||be careful to be sure the straight back end tubes don't hit in the curve of the boom arms, which prevents actually making the boom shorter. i've had best results cutting with a plumber's pipe cutter, to be sure new ends are square.|
|25th March 2011 05:12 AM|
|24th March 2011 11:59 PM|
|carlosgp5||Tks guys... and yeah mark i saw that article... just didnīt get why did he had to do that mold for the holes instead of just marking and drilling it...|
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