27" carbon cat black edition build

[kfxguy]

Travis, fill the rudder with JB Weld. I'm going to do that on my mono. Got the Promarine Skater today. I think I see the turning problem the guy was talking about. The leading edge of the rudder is behind the front of the prop by almost 1/4"... So I need to fix that. Looks like it came that way, the strut and rudder look stock. It's a surprisingly big and light boat!

Yea I've done the job weld thing before but in my opinion it's not a very elegant solution to it. I'd rather have some rudders made than to do that. If I can't have them made then I may weld the hole shut (I have a tig welder).


Here's the bracket I originally made that I'm not happy with.

[kfxguy]

My motor came in today. Looking at it closely makes me wonder how anyone could buy a leopard motor over one of these. It's just made extremely well. Notice it has a 8mm shaft necked down to a 5mm. That allows some serious rpm and a better bond between the rotor and the shaft. This is a 36mm motor too. I'm not sure how much influence I had on this but I talked to junlin at tp power about using 8mm shafts in there motors necked down to 5mm for some applications and she told me they could do it custom for me. Then they just started doing it. Best motor you can by for the money or even double the money.

[kfxguy]

Looking good!

Thanks!

[kfxguy]

By the way, I thought I was going to be making a emergency room visit last night. I was cutting the brackets for the strut in my bandsaw, I had just changed the blade and it cut faster than I anticipated and I didn't move my finger fast enough. It bit me pretty good. In the split second it got ahold to my finger it cut over 1/8" deep and through my fingernail. Didn't even hurt, at first lol. Today it throbbed all day long. I thought it was going to give me troubles with bleeding badly because I'm on blood thinners but it didn't thankfully. I felt like a dummy and was not believing I did that. I cut a strip of shop towel, wrapped it around it and then wrapped with electrical tape and went back to milling on the brackets lol.

[Erroneous]

Savage level 9 acheived. Looking forward to seeing this done (with all digits intact). Party on.

[kfxguy]

Savage level 9 acheived. Looking forward to seeing this done (with all digits intact). Party on.

This gave me a good laugh. Yea I guess you right, injure myself and go right back to building boats. Lol I've gotten super glue in my eye and went right back at it.

[CraigP]

You're a boat buildin' Som'Bitch, that's for sure! You gotta slow up on that finger widdlin'!

[CraigP]

Yea I've done the job weld thing before but in my opinion it's not a very elegant solution to it. I'd rather have some rudders made than to do that. If I can't have them made then I may weld the hole shut (I have a tig welder).


Here's the bracket I originally made that I'm not happy with.

What's the matter with that bracket? Just looks like too long a bolt and shave some off the top. It would be beautiful with some 3/16" bull nose radius' all around... Talking about the side bracket..

[kfxguy]

What's the matter with that bracket? Just looks like too long a bolt and shave some off the top. It would be beautiful with some 3/16" bull nose radius' all around... Talking about the side bracket..

The height of it is too short in relation to the knuckle for the rudder. I don't want to have to make a step or angle the width of it. That was rough mockup. I will round it when I'm set on the one I'm using. I have some radius bits for the mill. I should have something whipped up over the weekend. Right now I'm contemplating my choice of flex cable.


This is a fairly small boat, I was considering a .078 wire drive, mbp billet collet and change out the steel screws in the collet in favor of titanium ones to save a tiny bit of rotating mass. Might help some at 45k rpm right? Lol

[golfito]

Very nice construction.

[kfxguy]

For my future reference, the mbp collet weights 15.2g I'll try and lighten it from there. More pics coming soon.

[kfxguy]

On to a new try at a strut and rudder setup. Found some thick angle stock in my stage. First step is to see if I can even machine a accurate slot for the rudder knuckle. The clearance was less than .0005. Pretty good for a first try

[kfxguy]

Then I had to drill and tap for the mounting screw. This had to be 100% accurate and straight. No drill press used for this, only the mill.




Perfect

[kfxguy]

Next it was on to the pivot hole for the rudder. Let me just tell you I was nervous. I already had some time in this thing and if it didn't drill straight then the rudder won't turn smoothly. Notice how short the drill bit it. No flex there so the bit don't walk.





Got that whipped now it's time to lighten it up

[kfxguy]

One hole. Steering rod goes through here.





And another hole just in case lol (Also notice I milked off the extra steering arm, there was one on each side...not using it so it had to go)









I'm