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Barnacles and a Mirage Drive well crack http://www.hobie.com/forums/viewtopic.php?f=75&t=33328 |
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Author: | Tom Ray [ Fri Dec 17, 2010 6:19 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
Thanks, reconion. This is the first time I have felt lucky to have lost my mirage drive in the creek. Mine was a V1, and was replaced with a V2. On the left, my wife's original V1 drive, on the right, my V2: I assume the cut bevel rather than the rounded end means my shaft is splined and I'm good to go! |
Author: | KayakingBob [ Fri Dec 17, 2010 6:41 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
Yep, looks good. It's amazing how well a Mirage drive without a leash can act like an anchor! |
Author: | Gringo [ Fri Dec 17, 2010 7:40 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
We think we are seeing our TI's ability to point to windward improving with both drives down along with the centerboard. I say 'we think' because we have only had it out twice, last weekend and it was pretty light wind. But that would make sense, wouldn't it. With the drives in and the pedals aligned with each other, it's pretty low drag and acts as additional keel surface to give the boat some bite and reduce slippage when trying to sail close hauled. I would assume sailing off the wind it would be better to have the drives up and reduce the centerboard. We can't wait to get out and experiment some more. I'll take the GPS along next time to see about the speed. |
Author: | Tom Ray [ Fri Dec 17, 2010 8:49 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
The Mirage Drive in a solo Island does act a bit like a centerboard, but because the blades feather themselves into the current as the boat slips sideways, they don't reduce slippage all that much. Not creating much lift. For the same reason, they do not cause a lot of drag. Overall, I'd say the bigger advantage to leaving the drive in place is that you can pedal! I wonder if one or the other of the drives on a tandem will have more effect on sailing performance. They are likely to be on opposite sides of the center of lift. Try removing one, then the other, then both and report back (but not in this repair forum thread, on the main board or the tandem board). |
Author: | Tom Ray [ Fri Dec 17, 2010 9:34 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
reconlon wrote: Yep, looks good. It's amazing how well a Mirage drive without a leash can act like an anchor! Yep. Since that incident, we got a fancy color fishfinder on our powerboat, and I tried scanning for a hard spot in the bottom, looking for my old Mirage Drive. No luck. Just out of curiousity, what would happen if I tried to use my wife's V1 drive with my Click n Go boat? The shaft somehow releases the CnG? Does it just rotate the locking blade of the CnG right off? |
Author: | mmiller [ Fri Dec 17, 2010 9:47 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
Quote: what would happen if I tried to use my wife's V1 drive with my Click n Go boat? The shaft somehow releases the CnG? Does it just rotate the locking blade of the CnG right off? It will work if you take a break from time to time to allow the right hand CnG lever to reset. |
Author: | Tom Ray [ Fri Dec 17, 2010 1:12 pm ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
Thanks, Matt! |
Author: | dosjers [ Sat Dec 18, 2010 9:46 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
Gringo wrote: We think we are seeing our TI's ability to point to windward improving with both drives down along with the centerboard. I say 'we think' because we have only had it out twice, last weekend and it was pretty light wind. Have you tried sailing your TI with the drives removed? If you go out and time the differance between having them up or down I'd really appreciate you comparing the speed with them removed and the plugs installed. I have only sailed my TI with the drives in it one time and that was because we had really light winds and I was with a group of kayakers who were paddling their boats and I needed to stay with the group. When we had two AI's my wife and I did speed comparisons and hands down the person sailing the AI with the drive removed was always noticably faster. I would sure like to see some objective data. |
Author: | Tom Ray [ Sun Dec 19, 2010 5:11 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
Thanks for the further clarification on the shaft thing, RR. I do not anticipate ever using my wife's drive in my boat, but I'll put a little mark on it and see if it moves. Her hull was manufactured in January of 08, so I'd guess the V1 drive dates to about then as well. The drive does act a bit like a daggerboard, and much more so if the boat is stopped and drifting beam to the wind. The blades can't feather far enough for that, so they provide good resistance to being blown sideways. Under sail, the drive fins do provide a bit of lateral resistance, just not nearly as much as the board. If I'm not pedaling, I leave the blades centered when going upwind, and leave one foot resting on a pedal to keep the blades against the hull on any off wind angle. I would think that keeping the blades vertical would be more efficient for the same reason race cars draft each other, but have found that the boat is faster with the blades against the hull, but points better with them down. Points best with them in motion! |
Author: | Tom Ray [ Mon Oct 02, 2023 3:26 am ] |
Post subject: | Re: Barnacles and a Mirage Drive well crack |
Wow, this is an old thread. I finally cracked the new hull that Hobie gave me back in 2010. Twice, actually, as I found cracks in the same Mirage Drive Well location and under the mast step. This might be related to my preference for sailing when the wind speed starts with a 3. I decided to just sell both boats and the trailer and let the next owner figure out how to fix them. I'm going to buy a Tandem Island. 2007: just arrived in my yard, rudders still wrapped from the factory. And over the weekend, headed out my driveway under new ownership. We had a lot of fun with these boats over the years and I'm looking forward to cracking a new one. Sailing. I'm looking forward to sailing a new one. |
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