|5th September 2009, 07:38 AM||#1|
Join Date: Jun 2009
Board Repair Advice please
Any advice appreciated from users who have maybe done this before or know some good info. Thanks!
Here is what happened and what I am thinking of doing...
Well just jumped too high and go blown down wind a bit too much by a gust (yes I was maxed on a 3.7) which resulted in a flatter landing than ideal. I planned away and didn't realise the damage until I finished my session. Dam!
There is a now a crack all the way across the width of the board going around the rails and stopping at foot strap padding. Not sure if it goes further on top of deck, or if the core is split. I simply don't know.
My aim is to repair it so I can use it just as a riding board, so i plan to strengthen it just enough as i know it will probably break if I push it too hard on jumps (it must be a very weak point now).
I have sanded it back to the glass/carbon layer and I think I will just put 1-2 layers of glass and resin it over the point, to just up the side of the rails. I don't see it worth taking the foot padding off as just too much hassle to I will just do the bottom and rails.
Main Qs I have are: How am I doing? Should I use glass, or carbon? which better? Can I just use same resin and technique with the carbon? How big area should I sand away? Need more sanding?
Thanks in advance!
|5th September 2009, 02:47 PM||#2|
Join Date: Jun 2008
it must have been a hell of a jump...
The crack looks really serious...it seems that it goes all the way around the board...if this is the case, you need to take the foot pad down and put some fiberglass there as well, or it will braek very soon.
In my opinion you should sand a bit more, I would do 20-25cm on each side of the crack...just to be sure...put not only one layer, I would say 3-4 layers with reasonable overlap, take some finer fiberglass (60-100g/m2)...that way you can have more layers at small thickness. Carbon as well as aramid is possible, the less weight of the fibers the finer structure, the more you can put layers, the better.
About the resin, once it works for glass it should work for carbon and aramid as well.
PS: it is pretty big surface, do it under vacuum. If you can't be carefull.
PA 86 & eVo 100 (with S-1); iS 101 & 122 & 144 (with Overdrive)
|5th September 2009, 06:23 PM||#3|
Join Date: Aug 2006
That's a serious damage. We had 35-47 knots mean wind yesterday, so I saw some broken boards here too.
Anyway, on your board, not only the top fiber layber but the sandwich and probably the fiber under the sandwhich is broken too. It will not hold up if you only patch it up on top like you are suggesting. You need to route/sand the sandwhich and possibly even soome of the EPS. Then build it up from the bottom up with eps (or expanding PU) then fiber, carefully connecting it to the original layer, then sandwhich foam, preferably vacuumed and feathered in with th original, and finally fiber on top, I would go for three layers 100g, first on 40cm then on 25cm and then om 15cm wide. Before putting on the top layber, you can also put in some 10-15cm long and 2cm deep wood reinforcements across there the break was, but with a good ground work that should not be necessary.
So it is some work to do this. But fully possible. And its better to do it thoroughly from the start.
Even though your board is not in two pieces, I think the best illustration of what you have to do is this one: http://www.boardlady.com/snap.htm
|6th September 2009, 10:15 PM||#5|
Join Date: Sep 2006
I think you`ll need to router out two grooves and insert two strigers well into foam either side of break.Broke nose off a board a while back and inserted two balsa wood stringers and then reapired as normal.Your area is more stressed than nose so I`m not sure even that would work ??? Good luck >>>