KNPC's 43'' Conquest build

[dana]

Beastly!

[HRC]

Looks great Kevin. We will be looking for a video -:)
Dave

[Rumdog]

Did she run yet?!

[knpc]

Unfortunately not, I wound up having to work saturday and today was a sh*ty day weather wise. I'll be at the pond next weekend no matter what.

[knpc]

I took her out for the first run today, it didn't go as well as I hoped it would. Everything worked great except the motor coupler. I put it in the water, went about 100' then heard a winding noise. Went and got it, found the problem and tightened the coupler set screws. I put it back in the water and got about 6 or 7 laps in before it stripped again. I'll order a collet style coupler this week as it seems the set-screw coupler just can't handle the torque of this motor.

For the few laps I did get in the boat ran awsome, the 2230 is a beast. It ran 63mph with a very conservative prop and stayed planted in the straights and the corners. Everything was cool but it was only a one minute run so it's hard to take too much from that. I'll order a new coupler and hopefully have it by next weekend for more testing and a video.

[Punisher 67]

Kevin setscrew couplers can work but not with tiny screws , I make my own and put in 10/32 screws . also the flex shaft needs to be soldered at the end so the screws can get a good bite into the cable . my Sniper has only two setscrews holding the cable and not a single issue in 3 years .

Sorry to hear about the first run , My Apache with a collet coupler 30 feet out same thing just didn,t tighten it enough .

[Fluid]

Big boats with large props put extreme stress on couplers. I gave up on set screws years ago, but collets require special attention to maximize their reliability. You need to put an anti-seeze compound on the collet threads, otherwise much of the torque applied by your wrenches is wasted on internal friction. It only takes a little compound, but it increases the holding power of the collet substantially - with no additional pull on the wrenches.



.

[knpc]

Thanks Peter, if you get a chance could you post a picture of what your coupler looks like.
I guess if that's the only problem I have on a maiden run then it's not too bad.

I did solder the end of the flex cable and used locktight for the setscrews but they still wouldn't hold. They are very small setscrews, 6 on the cable side and I torqued them as much as I could without stripping them.

When I first heard the winding sound I figured I lost the prop or prop and flex, fortunately everything stayed in place and didn't sink to the bottom of the pond.

[knpc]

Thanks for the tip Jay, any specific product you recommend?

[Punisher 67]

You can make both work but they each need to be done right . The setscrew coupler has to be made right and not with weenie screws either , I don,t know what went wrong for you Jay but I have had absolute luck with the ones I made .

But do try the collet types as Jay mentioned they certainly are reliable tightened correctly

I don,t have a picture but the I do have a youtube video

http://www.youtube.com/watch?v=x6WI0MIzlHE

[knpc]

Just watched the video Peter, those couplers look really nice and have much bigger setscrews than what I'm working with. I'll have to add one of those to my next motor mount order

It must be great to have the ability and resources to make your own parts and not always rely on other people, I'm a bit jealous

[Punisher 67]

Sorry for the late reply Kevin , Having the ability to create your own hardware is great but it can also be a curse , You have to watch what you post....you get enough demand for an item and it serously impeeds on your spare time if you try to please everyone with requests . not to be an a$$hole I try to help as much as possible but you have to look at your own free time also . Between work + sleep some days there is only 4.0 hours that you have to yourself and if you shoot yourself in the foot machining requests you are left with zero time to do anything but run the whole process over day after day .

As far as the couplers the large screws and soldering the flex shaft tip has worked very well for me , But collets are almost bullet proof providing they are tightened properly

[knpc]

I understand where you're coming from Peter. I am a carpenter/construction supervisor, there is always a family member or friend that wants me to do work on their house. If I'm lucky I get one weekend a month to myself. I haven't even gotten that lately, I've been doing something for someone the last six weekends.

I did get a collet style coupler this week and put it on. Hopefully I can get out for some testing tomorrow before this hurricane shows up.

[knpc]

Video posted !