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Sep 29, 2012, 04:39 PM
WooHoo!
woodybob's Avatar
Quote:
Originally Posted by capntroy
Really liking the engineering Pat! That shaft boss in the skeg is nicely done...
Shaft boss? I thought, ah f, now what do I do? Thanks for 'splainin' my faux pas.
Last edited by woodybob; Jan 24, 2013 at 12:10 PM.
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Oct 21, 2012, 11:31 AM
WooHoo!
woodybob's Avatar
It’s been awhile… this thread was off the grid.

I had some final shafts made for the Astro Flight belt drive. Basically, ¼” reduced to 3/16”. ¼” thru the plastic bearing block, then 3/16” for the uni. The brass tube between the belt drive and motor represents the uni for alignment purposes. It’s a tight fit but I think it will work OK. Need to make motor mounts now.


I opened up the deck area where the motor cover goes for as much access as possible. I also cut a hole over the rudder-post for access once the deck is glued to the hull. Made a hinged toolbox that gets screwed to the deck to cover that hole. I made the roof to the pilothouse removable for now, to make it easier to paint and get the windows glued in later.
Oct 21, 2012, 05:23 PM
Grumpa Tom
Kmot's Avatar
I like the toolbox cover Pat, very clever.

Who's doin' your machine work?
Oct 21, 2012, 08:03 PM
Registered User
CaptCB's Avatar

Pat


Realy looking good!! I think the roof looks great. Charlie
Oct 21, 2012, 09:23 PM
WooHoo!
woodybob's Avatar
Quote:
Originally Posted by Kmot
I like the toolbox cover Pat, very clever.

Who's doin' your machine work?
Zolie, a buddy's neighbor.
Oct 21, 2012, 09:47 PM
Keep a Steady Strain....
capntroy's Avatar
Coming along nicely! Definitely digging the extra touches so far...
Oct 24, 2012, 01:58 PM
WooHoo!
woodybob's Avatar
Thanks boys.

I got the motor mount blocks made from a chunk of Ash. It was a little hairy inserting the brass inserts because my test piece wanted to split. I drilled oversize holes, just enough so the threads of the insert would still cut into the blocks. I put a nut & washer on the 4/40 hex screw so once the insert has seated, I could get the screw out without backing out the insert. ZAP them with some thin CA and they ain’t goin’ nowhere. The only fiddling left to do is shaping the foot of each mount to the hull.

The plain clam shell mount is from MPI. Part # ACC315.
Oct 24, 2012, 04:54 PM
Grumpa Tom
Kmot's Avatar
Not a UCLA fan woodybob?
Oct 30, 2012, 11:37 AM
WooHoo!
woodybob's Avatar
Got a little more done over the weekend. Stuffing tube glued in place, motor mounts glued to the hull. I carved some of the skeg down for the rudder support. 2/56” brass inserts are used to screw the brass support to the hull. I discovered that the SS 1/8” rod going thru the rudder is removable. Not sure why, but at a loss on how to glue it back into the rudder. Surprised that no cross bar was put on the 1/8” rod prior to molding the part.
Last edited by woodybob; Oct 30, 2012 at 12:20 PM.
Oct 30, 2012, 02:41 PM
1/2 a bubble off
Apismelifera's Avatar
Sand the part of the rod that would be inside the rudder with some 100 grit or less sand paper. Use a small file for the shaft hole inside the rudder. You don't need to remove a lot of material just roughen up the surfaces.

Mix up a very small batch of 1 hour or longer epoxy. Put a little epoxy into one end of the rudder shaft hole, say the top. Wipe some on the rudder shaft, the part that will be inside the rudder. Slowly insert shaft into rudder, some epoxy should emerge from the bottom of the rudder when the shaft is pushed through.

Clean up the bottom of the rudder and exposed parts of rudder shaft. (Q Tips?)

Then put it aside and wait.
Oct 30, 2012, 05:58 PM
WooHoo!
woodybob's Avatar
Sounds good to me...thanks.
Oct 30, 2012, 06:50 PM
Keep a Steady Strain....
capntroy's Avatar
Or I could just send you a new one Pat, the polymer should have adhered to the shaft better than that...
Oct 30, 2012, 07:15 PM
WooHoo!
woodybob's Avatar
Thanks Troy, I'll see if some epoxy will work.


I scuffed up the shaft with a file, scrapped out the hole a bit on the resin rudder, and filled it with epoxy.
Hopefully that shaft will never rotate again inside the rudder.
Last edited by woodybob; Oct 31, 2012 at 02:37 PM. Reason: added comment
Nov 11, 2012, 05:44 PM
WooHoo!
woodybob's Avatar
Humm…
I got the servo placed, need to make final adjustments once I dig up a receiver and check travel. Got the drive done, made a jam nut for the prop from a brass nut, using Octura steel & moly-nylon thrust washers to help it keep it spinning smoothly. Found an old AF 208D ESC in a drawer, which should work nicely. Going to swap out the Zero Loss with Sermos for continuity. Once I dig up that receiver and get a motor battery, I’ll be able make some final component placement decisions in the DTF. (kitchen sink)
Nov 11, 2012, 07:38 PM
Registered User
Clean, very clean!


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