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mirage drive blocks. can they be raised http://www.hobie.com/forums/viewtopic.php?f=71&t=63328 |
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Author: | Sardinian Islander [ Mon Jul 30, 2018 11:54 am ] |
Post subject: | mirage drive blocks. can they be raised |
as I wrote before i am facing a very disappointing problem with a little hole inside the mirage drive seat that is driving me crazy since i cannot work from the inside in that point i thought to add some welded plastic (hobie origina) on the hole but in this way i increase the surface and the mirage drive touch it when moving and this increase the problem. the mirage drive doesnt go in the blocks anf it pushes against the repair . now the hole is bigger than before. i wonder if the 2 blocks could be "adjusted" and raised a little in order to allow me to put some plastic on the hole. sorry to say that this is not a very good point for the design since i read other problems happened in that same place. since it's under the waterline and u could risk a lot with water inside the hull i suggest Hobie to improve this point. my tandem is a 2014 https://drive.google.com/file/d/15-lBp_Ot4i4HXT0Pe2tdXotA6VL5RUvG/view?usp=sharing |
Author: | stringy [ Mon Jul 30, 2018 2:58 pm ] |
Post subject: | Re: mirage drive blocks. can they be raised |
There’s something lost in translation SI and your problem isn’t clear. You have a hole in the drivewell ledge and want to raise the click-n-go levers??? Please try and repost your pic as it is not showing. |
Author: | Sardinian Islander [ Mon Jul 30, 2018 3:56 pm ] |
Post subject: | Re: mirage drive blocks. can they be raised |
Stingy can u see the picture now? sorry for my poor knowledge of some english terms i try to explain again. the point of the hull where we insert the drive (circled in my picture) had a little hole. since it is under the waterline you can understand that the amount of water was huge after some hours. i welded some plastic on it but in this way the mirage drive "touch" and grab the place where i welded the plastic. the friction removed the welded plastic and increased the size of the hole. I thought that if I could raise the click-n- go levers of only 0.1 inch the drive shoudnt grab the plastic anymore. i saw that the levers have a bolt so maybe i could add a metal plate under it in order to raise them. do you think it should work or maybe u have a better idea to suggest me? |
Author: | WAVERIDER [ Tue Jul 31, 2018 5:26 pm ] |
Post subject: | Re: mirage drive blocks. can they be raised |
I think you could probably add shims/washer under the bolts to raise the mounts. EDIT just saw your original post photo. You are talking about the front well nib wearing through. Raising the mount wont reslolve this as the drive simply pushes forward when pedalling and will rest on this. I have the same leak in my old retired adventure hull. You simply need a better and stronger weld job. A full patch not just a crack fill. Maybe by someone more experienced in it. Embedding a little stainless steel mesh in the repair is often suggested. If it is a thick repair then you may need to raise the drive simply to fit it into the new raised housing(depending on your available tolerance) |
Author: | Sardinian Islander [ Wed Aug 01, 2018 12:33 am ] |
Post subject: | Re: mirage drive blocks. can they be raised |
Thank u waverider. If I raise the levers. Do u think I can still use the same bolts or I need longer? How is the head of that bolt. Which tool do I need? |
Author: | stringy [ Wed Aug 01, 2018 5:19 am ] |
Post subject: | Re: mirage drive blocks. can they be raised |
I see the picture SI. The drive is designed to rest on that forward ledge so raising the lever locks won’t help. I agree with Waverider that a proper weld is needed, or use the correct PE epoxy. Hobie don’t recommend a repair in that area though and a replacement hull is the safest option. |
Author: | Sardinian Islander [ Sun Aug 05, 2018 2:25 pm ] |
Post subject: | Re: mirage drive blocks. can they be raised |
Honestly I dont want to think at a replacement hull and I am very surprised that in Hobie design there is a so big potential problem. they should have reinforced the drivewell considering that there are forces applied to the plastic there. Moreover I just bought this tandem used and I cannot think at the cost of a replacement hull. I thought to raise the levers because if i cover the crack with plastic, the drive will not enter properly anymore so i have to apply a bigger force to enter and in this way tge repair will be scratched even more. I thought that if i raise the levers i should probably return to the initial conditions. but this is theory I am starting to think that i will never get rid of this problem and maybe also abandon completely the boat i love. I am really very sad |
Author: | Pescatoral Pursuit [ Sun Aug 05, 2018 7:35 pm ] |
Post subject: | Re: mirage drive blocks. can they be raised |
Can you shave away a corresponding amount off the mirage drive without weakening it? |
Author: | tonystott [ Sun Aug 05, 2018 10:14 pm ] |
Post subject: | Re: mirage drive blocks. can they be raised |
I think I understand your problem... Obviously your top priority is to seal the leak in the front of the drivewell. You believe this will result in a raised lump just where the front of the Miragedrive rests. By increasing the height of the retaining catches, you will not be forcing the Miragedrive into the catches due to the front of the drive being held up by the raised lump in the drive well (this pressure risking failure of the seal). If that is the correct understanding, then raising the catches makes sense. Good luck. |
Author: | Sardinian Islander [ Mon Aug 06, 2018 12:52 am ] |
Post subject: | Re: mirage drive blocks. can they be raised |
Thanx Tony maybe I will try it, though I am not very optimistic. I wonder how much can I raise the clatches of the drive. In this moment I cannot check on my own because I gave the boat to somebody who is fixing the leak. I wonder if rasing the drive maybe 0.3 inches could cause the finns not to move correctly under the well. I have also another idea that I will probably explain in another post. has anybody realized a metal "jacket" for the whole drivewell? if i had a complete metal armour of the well the drive should press on the metal and not on the welded plastic. i wonder if the several people who had this problem with the drivewell leak had to change the whole hull of if they find a solution |
Author: | WAVERIDER [ Tue Aug 07, 2018 4:28 am ] |
Post subject: | Re: mirage drive blocks. can they be raised |
Sardinian Islander wrote: Honestly I dont want to think at a replacement hull and I am very surprised that in Hobie design there is a so big potential problem. they should have reinforced the drivewell considering that there are forces applied to the plastic there. Moreover I just bought this tandem used and I cannot think at the cost of a replacement hull. I thought to raise the levers because if i cover the crack with plastic, the drive will not enter properly anymore so i have to apply a bigger force to enter and in this way tge repair will be scratched even more. I thought that if i raise the levers i should probably return to the initial conditions. but this is theory I am starting to think that i will never get rid of this problem and maybe also abandon completely the boat i love. I am really very sad There is typically a bit of a gap where the drive rests on the ledges, so there is a bit of tolerance to raising it a bit before it fouls the drive. You could also shave a bit off the drive spine nibs. Take a small bit off front and back (given it rocks back and forth you dont have to take it all off the front) |
Author: | WAVERIDER [ Sun Aug 12, 2018 3:12 am ] |
Post subject: | Re: mirage drive blocks. can they be raised |
Roadrunner, so what you are saying is the rear jams against the leading edge of the of the rear lip when the drive rocks forward, rather then down on to the forward lip. Interesting concept, at least this part of the hull will not have had any prior wear. maybe a bit of aluminium sleeve slipped in there may reinforce it?? |
Author: | tonystott [ Sun Aug 12, 2018 7:02 pm ] |
Post subject: | Re: mirage drive blocks. can they be raised |
Sorry, but I have difficulty sgreeing with your logic. 1. Pedal forces are concentrated on the FRONT lip. 2. Building up the rear of the socket will INCREASE forces on the front lip. 3. In order to seal the leak, it appears necessary to build up the front lip during the repair. 4. This will result, if nothing else changes, in greater pressure on the front lip due to the retaining "axle" 5. Raising the "axle" by shimmimg the drive mount will lessen pressure on the front lip, OR shaving off some of the front of the Miragedrive to accommodate the raised surface of the fron lip. I see absolutely no benefit in raising the rear lip. |
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