Forums > Stand Up Paddle Foiling

Takuma Kujira

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Created by Filow > 9 months ago, 16 Sep 2020
toppleover
QLD, 1990 posts
11 Apr 2022 12:18AM
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Hey there, does anyone know if the Takuma aluminium mast can be cut down like the Axis one can ?
I'd like to chop an 85 to an 80cm.

jondrums
113 posts
11 Apr 2022 2:44AM
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yes you can, but you will have to re-tap the holes with an M6 tap.

I personally chose to redrill and retap the middle hole to M8 since there is plenty of metal there to do it. Even though there are 3 of them, M6 is just not enough to keep the fuselage attached well for me.

Velocicraptor
197 posts
11 Apr 2022 6:18AM
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Select to expand quote
jondrums said..
yes you can, but you will have to re-tap the holes with an M6 tap.

I personally chose to redrill and retap the middle hole to M8 since there is plenty of metal there to do it. Even though there are 3 of them, M6 is just not enough to keep the fuselage attached well for me.



Good call. I ripped the m6 threads out of my mast and had to chop it down to remove the damaged section. M8 is the answer.

what did you use to fill the void in the mast (cut off the capped portion and need to seal it from water)?

jondrums
113 posts
12 Apr 2022 12:25PM
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Select to expand quote

Velocicraptor said..


what did you use to fill the void in the mast (cut off the capped portion and need to seal it from water)?


hot glue works

martyman
WA, 201 posts
12 Apr 2022 2:28PM
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Select to expand quote
jondrums said..



Velocicraptor said..



what did you use to fill the void in the mast (cut off the capped portion and need to seal it from water)?



hot glue works


brilliant

Velocicraptor
197 posts
12 Apr 2022 9:02PM
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Select to expand quote
jondrums said..





Velocicraptor said..




what did you use to fill the void in the mast (cut off the capped portion and need to seal it from water)?




hot glue works



Just did mine last night with thickened JB Weld epoxy and seems to have done the trick too. Now just need to tap the threads and I will be good to go.

Did you bother spraying the cut edge to resist corrosion? I figure whatever I spray will rub off in the fuse pocket and anodizing seems like PIA overkill.

This is all a bit moot as I should have a Cedrus within the next two weeks. No m6's there. Figure I can use the chopped mast as a low tide short-length alternative.

martyman
WA, 201 posts
12 Apr 2022 10:58PM
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Select to expand quote
Velocicraptor said..

jondrums said..







Velocicraptor said..





what did you use to fill the void in the mast (cut off the capped portion and need to seal it from water)?





hot glue works




Just did mine last night with thickened JB Weld epoxy and seems to have done the trick too. Now just need to tap the threads and I will be good to go.

Did you bother spraying the cut edge to resist corrosion? I figure whatever I spray will rub off in the fuse pocket and anodizing seems like PIA overkill.

This is all a bit moot as I should have a Cedrus within the next two weeks. No m6's there. Figure I can use the chopped mast as a low tide short-length alternative.


Just coat the area with tefgel.

Velocicraptor
197 posts
13 Apr 2022 10:36PM
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Here's my newly chopped 220 tail. 12.75" span (took about 2.5" off of it). Spent a lot of time shaving and shaping the profile because its a fatty. Haven't ridden it yet, but didn't like the original shape so figured why not.

pardon the artistic touch. Turned it into an art project w my kids.




windeee
8 posts
18 Apr 2022 3:38PM
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Select to expand quote
Velocicraptor said..


jondrums said..









Velocicraptor said..






what did you use to fill the void in the mast (cut off the capped portion and need to seal it from water)?






hot glue works





Just did mine last night with thickened JB Weld epoxy and seems to have done the trick too. Now just need to tap the threads and I will be good to go.

Did you bother spraying the cut edge to resist corrosion? I figure whatever I spray will rub off in the fuse pocket and anodizing seems like PIA overkill.

This is all a bit moot as I should have a Cedrus within the next two weeks. No m6's there. Figure I can use the chopped mast as a low tide short-length alternative.



For anyone over 85kg I JB Marine Welded my mast to the foot plate and fuselage last year and it got rid of nearly all the unhelpful flex in the foil so now I only feel small mast flex which is way more predictable - no longer an issue so have not felt the need to look at 19mm masts and adapters etc any more.

I put wooden dowels in the threads, JB marine welded the sockets, slid the connections together, removed dowels and bolted the connections together (threads pre greased but no intention of taking apart again). So it's bolted +welded for info.

JB marine weld impressed me not cracked or gapped yet I'm up toward 90kg with 5mm full winter neoprene on.

For info Alu mast with 1210 and 1440. Prone mostly with fair amount of winging. Have proned my old 980 and even the LOL 1600 and it was fine

foilthegreats
349 posts
4 May 2022 9:40PM
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Late to the party but have a 1210 and 1750 full kit on the way.

Plan is to use with the alchemysurf.co ETA is May/June

I ride 3-7 sec period lake swell that is total garbage, these days mostly right in the shore break with a 4'2" 30L prone.

Plan is to use the 1750 on the 45cm mast when its micro micro small. Have had a lot of success with the HS1850 but wanted something that can handle tip ventilation better. Basically ride in 1-2' of water with the 45cm.

Will use the 1210 when just micro small. Using the alchemysurf.co fuse should be great as I prefer short fuse and it's so much better in small micro waves as the geometry of the foil fits in the wave better.

Should be interesting getting this setup all tuned up to use in these conditions.

foilthegreats
349 posts
10 May 2022 12:31AM
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First impression.
Shapes look epic.
Build quality of the 1750 not great compared to 1210. Inside of connection looks like it should not have passed quality control but kind of expected from all the talk.
Mast and fuse look decent. Mast is sealed.
HS1850 pictured for comparison.
1210 tips aren't as sharp as I've imagined from all the talk but maybe they've rounded them a bit in latest production.























mcrt
466 posts
10 May 2022 2:10AM
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With that size foil i would epoxy pot the connection as soon as possible,it will fill those nasty voids too.

If you do it try not go to deep with the epoxy, i got ambitious with my LOL 1900 and now it is a lovely one-piece wonder.Fun to get it in the car :)
The 1210 and 970 came out fine.

A bit further than the first screw is all you need.

toppleover
QLD, 1990 posts
14 May 2022 2:08PM
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Another option to firm up the wing/fuse connection is to make a shim like in pic below out of some X-ray film.
I've made one for my 750 & it's pretty much a perfect fit.


kobo
NSW, 848 posts
14 May 2022 4:52PM
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Could you get one of the Armstrong barrel bolts and just drill a top hole to fit on the Kujira? , like the conversion kit did.

King Crash
NSW, 195 posts
14 May 2022 7:25PM
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I'm sure Jacko has suggested this here or another thread. Just use surf wax, it'll do a great job and 9/10 guys here will have it laying around.

mcrt
466 posts
14 May 2022 9:04PM
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Select to expand quote
kobo said..
Could you get one of the Armstrong barrel bolts and just drill a top hole to fit on the Kujira? , like the conversion kit did.


I have done that.The Armstrong bolt needs to be shortened a bit because the Kujira is a bit thinner in section.I sleeved the drill bit with tape to avoid wearing down the threads.You can Dremel the Barrel part so it will not stick out the sides so much.

But epoxy potting is the best solution, takes all the load off the bolts.

Both of these operations are a bit nerve wracking and require time and prep, very easy to fudge up .

I will probably try the surf wax fix on future foils, with hard tropical wax it might be enough support.



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"Takuma Kujira" started by Filow