My Martec runs very smoothly with a couple small harmonics at different rpm's. That's normal for nearly all drive trains.
Forward power is good. I think my prop is a wee bit underpitched. I can get hull speed with a clean bottom and max rpm but only 6.4-6.5 at cruise rpm (80% max). I really haven't had any issue with opening, closing, etc. I think the Martec is a good choice for folks who race and want minimal drag. If my use was only cruising, I'd probably have a different prop. Dennis C. On Thu, Feb 15, 2018 at 8:27 PM, Bruce via CnC-List <cnc-list@cnc-list.com> wrote: > Well, thankfully (or not) I found the pin, which is a good thing, except > that it was clearly broken during the removal process. At least I have > something to measure. The pin is really pretty tight in one blade, but a > little sloppy on the other, so yes, it will need to be refurbished. > > > > Interestingly, I can get to my prop shaft very easily by removing an > inspection panel in the cabin sole, so aligning the prop will be no big > deal at all. > > > > How do you feel about vibration (presumably the refurbishment would take > care of a lot of the potential problems) and forward power? > > > > Kindest Regards, > > > > Bruce C. Whitmore > > 1994 C&C 37/40+, “Astralis” > > Madeira Beach, FL > > 847.404.5092 <(847)%20404-5092> > > bwhitm...@sbcglobal.net > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Dennis > C. via CnC-List > *Sent:* Thursday, February 15, 2018 9:02 PM > *To:* CnClist <cnc-list@cnc-list.com> > *Cc:* Dennis C. <capt...@gmail.com> > *Subject:* Re: Stus-List Help with folding prop insights? > > > > Bruce, > > > > You're not going to get a lot of positive comments about Martec props on > this list. You'll get a lot of suggestions about this prop and that prop. > > > > Having said that, I have a Martec Elliptical on Touche'. While it might > not be everyone's favorite, I don't have any problems with it. Sure, I > have to drop down into a cockpit locker to align it before a race or a long > sail but that's the nature of non-geared folding props. > > > > As for rev erse, I back into my home slip without any issue at all. Just > need a bit of practice and anticipation and you'll be good to go (or back > up). > > > > I've dealt with Martec a couple times and found them to be fairly > responsive. They should be able to send you whatever parts you need. > > > > One thing to be aware of with Martec props. They have 3 "lives". With > use, the pin holes in the blades will begin to wallow out and the blades > will start to become loose on the pin. The fix is to return the prop to > Martec where they will, for a price, recondition it. Part of the > reconditioning process is to re-bore the hub and blades for a larger pin. > You can only do this twice. Hence the 3 lives, the original life plus 2 > rebuilds. > > > > So, before you send the prop to Martec for reconditioning, measure the pin > diameter and call them to see how many lives it has left. > > > > Dennis C. > > Touche' 35-1 #83 > > Mandeville, LA > > > > On Thu, Feb 15, 2018 at 7:28 PM, Bruce via CnC-List <cnc-list@cnc-list.com> > wrote: > > Hello all, > > > > I have a fixed, 3 bladed prop on Astralis currently, and suspect that its > slowing us down here in Florida where we just don’t get the wind like we > did on Lake Michigan, so we rarely see much over 12 kts or so. I’m > thinking I’d like to get a little more speed out of her, and one area of > improvement could be the fixed prop. > > > > In the pile of old parts that the prior owner left us, I found an old, and > obviously used Martec Eliptec RH18DX12P-3, two blade folding prop (it is > not geared). I have the blades and hub, but at the moment cannot find the > center pin. It seems like Martec may still be in the business of repairing > these props. > > > > I’ve read some of the various reviews, and I understand there are better > solutions out there, but clearly I’d be dropping a few boat bucks to pull > it off. > > > > Do any of you have direct experience with the Martec Eliptec, and can > advise me whether I’ll hate this thing from a performance or vibration > point of view if I get a pin and put it on the boat? > > > > I am OK with somewhat limited reverse, but would be anxious if I was > giving up a lot of forward power. And, I really don’t want a lot of > vibration, especially if it’s going to do things like tear up the cutlass > bearing. > > > > Thanks for your insights! > > > > Bruce C. Whitmore > > 1994 C&C 37/40+, “Astralis” > > Madeira Beach, FL > > 847.404.5092 <(847)%20404-5092> > > bwhitm...@sbcglobal.net > > > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > >
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