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Author Topic: Al Khubar build  (Read 5019 times)

Del Boy

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Re: Al Khubar build
« Reply #25 on: October 22, 2017, 05:30:16 PM »

Hi Andy, yes they both turn quite freely so I am a bit confused. I will have a go at swapping over the UJ's tomorrow and then the motor, I guess something could be out of line but just to check before hacking into the joints!
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T33cno

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Re: Al Khubar build
« Reply #26 on: October 22, 2017, 08:23:23 PM »

Good approach  :-)) 
Are your shafts lubed?


These are better if you are aligned.


http://www.modelboatbits.com/MICROFLEX-COUPLINGS


I use these but specially modified by Steve to 8mmx8mm plain


http://www.modelboatbits.com/POWERFLEX-COUPLINGS
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ANDY
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EDIT but you can roll it in glitter
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Del Boy

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Re: Al Khubar build
« Reply #27 on: October 25, 2017, 08:57:06 PM »


Hi T33cno, thanks for this, you will see why in a moment! First I tried to see if the motor was running true, seemed to be. Next I swapped the Pt prop shaft for the Stb one, no real difference I could see. I desperation had a rummage in my VERY old spares box (circa 40 years at least) and found an old spare plastic UJ. Fiddled around with this and got it on the shaft and it has made a significant difference. Too embarrassed to run with this so will be buying a pair of Microflex tomorrow! I see they have an oiling system so might buy that as well funds allowing. Daft question I know but what stops the water running up the tube and into the bilge? In my youth the shaft was filled with grease but MS say don't do that as it creates drag, any thoughts on that? Thanks again for the tip on couplings, much appreciated! :-))
Derek
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T33cno

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Re: Al Khubar build
« Reply #28 on: October 25, 2017, 09:06:12 PM »

Thick oil like 20/50 is most popular me thinks and recommended by MMM too. Without an oiling tube there is little option but to use a waterproof grease in my mind but others may know better.
As for water penetration the oil not only lubricates but is a barrier.
I oil my tubes or top them up prior to every outing.
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ANDY
A silk purse from a pigs ear maybe but you can't polish a Richard the III'rd
EDIT but you can roll it in glitter
All pictures hosted by SmugMug at my expense

Del Boy

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Re: Al Khubar build
« Reply #29 on: November 18, 2017, 01:11:04 PM »


Ok so after a bit of a break that included a trip to the IMBS in Warwick (that I found inspirational and made me realise I need to try a lot harder!) got out to the workshop. I have started to fix the deck supports
https://www.flickr.com/photos/155484366@N08/37718507814/in/album-72157687411062660/
Then my pal Longshanks who was up for the IMBS helped me mark up the water line
https://www.flickr.com/photos/155484366@N08/37718497924/in/album-72157687411062660/
https://www.flickr.com/photos/155484366@N08/37718492914/in/album-72157687411062660/
We then ran a test to see how much ballast will be needed......
https://www.flickr.com/photos/155484366@N08/38377226586/in/album-72157687411062660/ supposed to be a tug but note the cargo capabilities!
https://www.flickr.com/photos/155484366@N08/37718526824/in/album-72157687411062660/ sits very nicely.
Weighed all this lot up and then the white metal fittings, estimated the remaining plastic and finally Rx, Servo, ESC's etc. and should be roughly OK.
Need to fix a battery 'shelf' and the rest of the deck supports next.
Derek



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Del Boy

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Re: Al Khubar build
« Reply #30 on: November 19, 2017, 08:44:12 PM »


Battery support installed and sealed in with P38. Boring I know but all I had time for today!
P1000632 by DEREK RULE, on Flickr
Support beams next.
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longshanks

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Re: Al Khubar build
« Reply #31 on: November 19, 2017, 10:52:01 PM »

Longest journey starts with the first sixth step  ;)
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Del Boy

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Re: Al Khubar build
« Reply #32 on: November 21, 2017, 09:00:17 PM »


Started on the foredeck supports now. Bit tedious but OK. Need more clamps!
P1000636 by DEREK RULE, on Flickr
Whilst they were drying tried a simple Rx layout design....
P1000634 by DEREK RULE, on Flickr
Interesting, what I thought was going to be lots of space ends up quite small!
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Del Boy

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Re: Al Khubar build
« Reply #33 on: November 23, 2017, 08:52:22 AM »


Made a start on the battery mount yesterday. Used 15mm sq. pine and seems to do the job. Longshanks recommended not fitting the end stop yet so that come balancing time I can move the battery forward if needed, clearly a great idea. That should be relatively easy to add later as there is a big opening under the bridge once deck etc. is all in place and final trimming is needed.
P1000637 by DEREK RULE, on Flickr
P1000638 by DEREK RULE, on Flickr
Hoping to find time for deck fitting today.
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longshanks

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Re: Al Khubar build
« Reply #34 on: November 23, 2017, 02:19:27 PM »

That's not going anywhere  :-)

Don't know what the jury think (I've never worked with big lead acid cells).

Is it worth putting a strap of some sort over the top??

Kev
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T33cno

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Re: Al Khubar build
« Reply #35 on: November 23, 2017, 07:40:40 PM »

No straps on mine, they're far too heavy to move on their own. :-))
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ANDY
A silk purse from a pigs ear maybe but you can't polish a Richard the III'rd
EDIT but you can roll it in glitter
All pictures hosted by SmugMug at my expense

Del Boy

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Re: Al Khubar build
« Reply #36 on: November 23, 2017, 09:45:05 PM »


Thanks for the suggestion Kev, it does feel very secure (famous last words) plus of course 'er indoors is good at that sort of stuff so will be requested depending on 'er mood!
Thanks too Andy I will see on the first few sails how it goes, it does seem to weigh a ton so should be stable like yours.
Must admit a Grumpy Monk tonight  :(( , just could not get an acceptable fit around the decks .... must try harder
P1000640 by DEREK RULE, on Flickr
So to cheer myself up I started mounting the various bits of electronic gear on the plate I intend to use, that went better!
P1000641 by DEREK RULE, on Flickr
Will continue with this over the w/e
Thanks for checking in chaps, much appreciated!
Derek
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david48

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Re: Al Khubar build
« Reply #37 on: November 24, 2017, 09:14:06 AM »


I have had thoughts about battery movement in my Fairmount , its is not the movement when its on the water ,its when its in the car . Because thy are very difficult to get in and out thy have to stop in all the time so when the car hits a hole the battery there is a slim chance because thy are heavy it could do damage ,that's why I secured them down.
That's my twopennys worth .
David
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T33cno

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Re: Al Khubar build
« Reply #38 on: November 24, 2017, 09:29:27 AM »

I find it best to transport the batteries separately and fit them when at the pond. This makes everything lighter and easier to handle.
Fair point about difficult access David. Mine is made easier by using two rather than one huge one
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ANDY
A silk purse from a pigs ear maybe but you can't polish a Richard the III'rd
EDIT but you can roll it in glitter
All pictures hosted by SmugMug at my expense

Del Boy

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Re: Al Khubar build
« Reply #39 on: December 05, 2017, 08:32:52 PM »


David, Andy, first of all thanks for the suggestions, hints and tips. In fact I do have to own up, the battery I have been showing is from my dingy inflator so 'free' to a certain extent. I thought I would try with that first, see how I got on and then if a change of strategy is needed buy two smaller cells just like yours Andy. Just me being cautious really but I do like the idea of fitting at the lake, will give some thought to transport needs and supporting it up high to do this fitting. Back in the workshop briefly today and threw in (quite literally and I know it looks it as well) two supporting beams for the Rx shelf. Not pretty but hopefully functional. I am hoping to tackle the final fit of the rudder servo tomorrow. Bit worried as part of that linkage has to go under the rear deck and don't know if my fingers and thumbs can manage that but that's to think about tomorrow.
P1000642 by DEREK RULE, on Flickr
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david48

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Re: Al Khubar build
« Reply #40 on: December 05, 2017, 08:47:01 PM »


Make your self a dummy battery out of wood the same size as the battery you intend to use ,then its not heavy to use and you can build round the space it takes up ,then you know you can get it in and out.
David
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ChrisF

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Re: Al Khubar build
« Reply #41 on: December 05, 2017, 09:35:35 PM »

You're making a nice neat job of everything, good work.
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Del Boy

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Re: Al Khubar build
« Reply #42 on: December 06, 2017, 09:15:31 PM »


Thank you Chris, the encouragement is well received!


Fixed the Rx and ESC shelf in place tonight, added a simple rudder linkage too to see what issues I might get.


P1000644 by DEREK RULE, on Flickr


Then dropped the rear deck over just to see if I had the right access etc. to remove and lift out for adjustment and repair, dare I say it but seemed OK!


P1000646 by DEREK RULE, on Flickr


Thanks for stopping by....


Derek
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T33cno

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Re: Al Khubar build
« Reply #43 on: December 06, 2017, 09:29:54 PM »

There's tidy for you  :-))
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ANDY
A silk purse from a pigs ear maybe but you can't polish a Richard the III'rd
EDIT but you can roll it in glitter
All pictures hosted by SmugMug at my expense

ChrisF

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Re: Al Khubar build
« Reply #44 on: December 06, 2017, 09:40:07 PM »


Derek, interesting that you have  the rudder servo on its side to suit the low rudder assemblies, not seen that before.


I'm about to start building a boat that would benefit from a reduced height rudder but was concerned that water could get into the hull up the shaft. Can this be a problem?


Chris
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longshanks

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Re: Al Khubar build
« Reply #45 on: December 06, 2017, 10:54:37 PM »

Wow that's neat, love it

 :-))

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