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Slingshot Hoverglide fuselage break
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mcterry65



Joined: 12 Sep 2000
Posts: 11

PostPosted: Tue Jul 07, 2020 10:08 pm    Post subject: Slingshot Hoverglide fuselage break Reply with quote

Hey foilers, anyone have a Slingshot fuselage break? I was sailing at Arlington in about 20 mph wind on a 5.6 sail and the Slingshot Infinity 76 front wing. I weigh 200 lbs. The break was at the fuselage to mast bolt.
The wing was scratched on the top side.
Any thoughts.



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Last edited by mcterry65 on Sat Jul 11, 2020 9:25 am; edited 3 times in total
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stringp



Joined: 20 Aug 2000
Posts: 161

PostPosted: Wed Jul 08, 2020 9:18 am    Post subject: Reply with quote

I snapped mine in half at the mast bolt hole. I hit a submerged log pretty hard.
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loonie2



Joined: 18 Jun 2004
Posts: 138

PostPosted: Wed Jul 08, 2020 10:39 am    Post subject: Reply with quote

New to wind foil. The fuselage seems pretty heavy duty ("weighty" at least). Assuming you didn't hit anything, maybe the screws were not tight or loosened causing some movement leading to a break. It would seem like it would take a lot (or a defect) to cause a break. Slingshot does suggest Teflon tape. I used it at first but it comes off so didn't continue...
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stringp



Joined: 20 Aug 2000
Posts: 161

PostPosted: Wed Jul 08, 2020 1:21 pm    Post subject: Reply with quote

Iím 200 lbs also.
I upgraded to a GW101 with the 683 wing. Word of warning, the GW stays in the truck and I ride the mangled Infinity 76. Itís much harder to foil a jibe on the 683 at our size. Also, you canít bolt the Moses 790 (Infinity 76 equivalent) on the GW101 fuse and have to buy the 900. $$$.
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mcterry65



Joined: 12 Sep 2000
Posts: 11

PostPosted: Wed Jul 08, 2020 2:18 pm    Post subject: Reply with quote

Thanks for the replies.
I loaded some pictures.
It is just weird the the scratches are on the top of the wing. I would think if I hit something there would be damage on the front or bottom. Bolts are tight. Anyway, I got replacements so Iíll get back on the water soon.
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grantmac017



Joined: 04 Aug 2016
Posts: 898

PostPosted: Wed Jul 08, 2020 4:02 pm    Post subject: Reply with quote

The fuselage is not a very good grade of aluminum alloy.
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a123



Joined: 17 May 2008
Posts: 9

PostPosted: Wed Jul 08, 2020 5:33 pm    Post subject: Reply with quote

mcterry65 wrote:
Thanks for the replies.
I loaded some pictures.
It is just weird the the scratches are on the top of the wing. I would think if I hit something there would be damage on the front or bottom. Bolts are tight. Anyway, I got replacements so Iíll get back on the water soon.


I had a chance to look at your fuselage at Arlington. When I first saw it I was scratching my head. It occurred to me it could have been an underwater cable that you caught the front wing on. This would explain the large scrape and broken fuselage. From where you told me you were foiling it made sense that there might be a mooring cable submerged to the east of the port water access. Just a thought.
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staftek



Joined: 07 Jun 2001
Posts: 2

PostPosted: Thu Jul 09, 2020 9:47 am    Post subject: Reply with quote

I don't think you hit anything. Given that there is so little aluminum left where the bolt hole is and the high stress at same point, a failure from repeated stress is quite possible. Over time stress cracks may have slowly developed. When the weakened aluminum finally failed the wing came up and hit the mast, making the mark on the top of the wing. This would feel like hitting something submerged. Take a close look at the mast and see if there is a corresponding mark on the leading edge.
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alakghosh



Joined: 13 Nov 2005
Posts: 77
Location: San Francisco Bay Area

PostPosted: Thu Jul 09, 2020 12:40 pm    Post subject: Reply with quote

I just experienced exactly the same fuselage failure!

https://photos.app.goo.gl/u9pR79LnvJ6rHdWR7

I didn't hit anything and it snapped right at the front bolt connecting the fuselage to the mast. Some local experts informed me that this is metal fatigue and that this is a design flaw. That part of the fuselage needs to be reinforced to prevent this kind of failure.

Update: Slingshot was really great about getting me warranty replacement parts for this! I continue to be a happy Slingshot customer Very Happy


Last edited by alakghosh on Thu Jul 30, 2020 6:01 pm; edited 1 time in total
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stringp



Joined: 20 Aug 2000
Posts: 161

PostPosted: Thu Jul 09, 2020 12:51 pm    Post subject: Reply with quote

Mine broke in the same spot.
How did you manage to get the parts back to the beach?
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