Model Boat Mayhem - Forum

Dry Dock / Shipyard: Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: essex2visuvesi on April 27, 2012, 08:15:00 AM

Title: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on April 27, 2012, 08:15:00 AM
Are you sitting comfortably then we shall begin...

Purchased (or stole considering the price) a 36" Fibreglass Huntsman kit on Ebay a few weeks back. It cost me almost as much to post to Finland as it did to buy it but even so it was still less than half the price of a new one :).
While waiting for delivery I browsed the usual suspects looking for motors etc

And ended up with this lot
(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/Huntsman%20Build/2012-04-26-082.jpg)

what we have in the picture is:-
200amp watercooled brushless speed controller.  Overkill? maybe but it is popular knowledge that Chinese Amps are smaller than European
2x 2650MAH 6S lipos 22.2V 35C Lipo Packs. These will be used together to give 22.2V 5300Mah
Motor C4240 Brushless outrunner 1020KV 660W 9T motor with watercooled mount
12" M4 Propshaft and 3 off 2 bladed Props 35, 40 and 45mm

Box arrived and all was well the plywood was in suprisingly good condition with just a little warping. An hour in the sauna and a night under a couple of tractor batteries and the sheets were straight again.

Less however can be said for the hull :(
(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/Huntsman%20Build/2012-04-26-087.jpg)
The hull has a decided bow in the side. you can see it easily when looking at the hull but its cot so visible in the pictures.

And there are a couple of moulding flaws
(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/Huntsman%20Build/2012-04-26-086.jpg)
Will i be ok to just sand these back and fill? I plan to paint the hull anyway as the white has yellowed a little with age.

I have built the internal bulkhead frames and stringers ready for fitting to the hull but for some reason forgot to take pictures  :embarrassed:
Tonight I plan to warm the hull and try to get the frames inside and maybe fit the propshat rudder tube and water cooling pickup.  (I think this will be one of the times when knowing naughty words in more than one language will be a bonus)

Another daft question springs to mind as I write
This is the watercooling pickup I plan to use
(http://www.cornwallmodelboats.co.uk/acatalog/5511772.jpg)
I just want to confirm this needs to be fitted between the rudder and the prop and offest to one side.  My question is what side and how far?

More pics land updates later :)



      
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: triumphjon on April 27, 2012, 08:18:28 AM
water pick up needs to be in direct line of wash from prop , slightly off set from the centre of shaft .
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: Norseman on April 29, 2012, 09:24:01 PM
I'm going to enjoy this thread
Lot's of detail please as I have a full 30 invested in an old Precedent Huntsman.
Currently mine's residing in the shed in a very sorry state.
(http://s18.postimage.org/5ufb58jud/Precedent_34_inch_Huntsman_002.jpg) (http://postimage.org/image/5ufb58jud/)
Dave
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: triumphjon on April 30, 2012, 07:15:04 AM
dave , it would look much better after a good clean ! are you fitting out as electric , or keeping it glow powered ? depending on which airscoops you require ,im able to make the classic polished ones in alloy which i then polish ! the pulpit on yours looks quite good in the photo .
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on April 30, 2012, 08:15:25 AM
Well I managed to get the frames into the fibreglass hull took a lot of heating up... ended up using a hot air paint strippper on low setting as the wifes hairdryer couldn't put enough heat in.
Next job is to get the propshaft, rudder and water scoop fitted

Hopefully getting my CNC machined window frames back today

Considering skinning the cabin front and sides in mahogony veneer and planking the decks with walnut.... what do you guys think?
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on May 09, 2012, 01:32:17 PM
Waiting on My P bracket to arrive before I can get anything else done... I want to get the prop fitted before fitting the deck.  This has raised a question:-

Do I Glue/Solder the propshat tube into the P bracket or just leave it loose?
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: Chris_B_UK on May 09, 2012, 07:57:53 PM
I would glue it or solder it! Otherwise unless it is a micron fit you will still get vibrations.

I soldered mine in
see pic
http://postimage.org/image/mhsh85zdv/ (http://postimage.org/image/mhsh85zdv/)
Chris
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: Stavros on May 09, 2012, 09:51:44 PM
Just read this and I have a Huntsman 48ins and have an outrunner in it 900v/volt running on stickpacks 18v I can safely say it will be OVERKILL on 22v as it will be reving to 22000 rpm I am on 16000 rpm on a 50mm 2 blade prop and she is Ballistic.I personally think you will flip her over on the turn,ask Dave at ACTion who actually designed the hull for this model for his advise if I wias you
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on May 10, 2012, 07:13:45 AM
Just read this and I have a Huntsman 48ins and have an outrunner in it 900v/volt running on stickpacks 18v I can safely say it will be OVERKILL on 22v as it will be reving to 22000 rpm I am on 16000 rpm on a 50mm 2 blade prop and she is Ballistic.I personally think you will flip her over on the turn,ask Dave at ACTion who actually designed the hull for this model for his advise if I wias you

I had realised this and have since ordered a couple more brushless motors:-

C4260 500Kv 1375W and a C4250 800Kv 1255W

Along with a selection of props and the Castle Creations ESC Ive borrowed from one of my helis (has data logging) I should be able to get a nice balance
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: Stavros on May 10, 2012, 09:13:55 PM
I think the 800kva one will do very nicely Sir


Dave
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on June 11, 2012, 09:08:43 AM
Well the motor is in, propshaft fitted, rudder, radio box etc etc.
I meant to take pictures but I forget.... "I'll just do this bit then take some pics" and then I start the next bit  :embarrassed:

I will put some pics up tonight tho before I start fitting the deck ply.
I have decided to go with lime and mahogany planking.

Managed to find some "Interesting" 1:12 figures to add to the deck.  More details on these later.

Also before fitting the deck should I varnish the wood frames inside the hull?
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on July 02, 2012, 07:17:38 AM
I have been progressing slowly but surely

Shes been tested in the pool and works well.  I had issues getting the watercooling to work effectively, so I intsalled a windscreen washer pump into the cooling circuit, running on 4.8V it gives a good flow.
I started building the supersctructure and discovered a monumental cockup in my electric layout :( ... I put the battery packs and ESC right where the lowest part of the deck goes  :embarrassed: So I have to remove the battery trays and relocate further forward :(
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: goBulawayo on October 02, 2012, 10:20:13 PM
How is this build going? Waiting in anticipation for details on the 'interesting' 1:12 figures! I would love to build one of these someday, but maybe I should finish my S100 schnellboot conversion and yachts first!!

Wayne
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on October 03, 2012, 07:50:02 AM
3 kids, a wooden house and plumbing from the dark ages means that slightly more important things have been taking up my time :(

I'm hoping to have a few hours to spend on her in the next week or so.

So far I have the electrics fitted and tested including a water pump for the cooling system which runs from its own esc.  This runs from its own 3 postion switch on the TX... off, 40%(Gives a nice scale flow) and 80%(Full power gives far to much flow and looks silly)
I need to mess with the soft start settings on the esc as the motor "kicks" on start up enough to put the hull almost vertical  :o

As for the figures I have made a start.... I opened the packaging and decided on colours

A major issue I am having tho is the wood.... the kit was a "steal" on ebay but some of the sheet ply has warped quite badly so I may need to copy the parts and recut them in fresh ply.
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: sailorboy61 on October 03, 2012, 09:21:15 AM
Waiting on My P bracket to arrive before I can get anything else done... I want to get the prop fitted before fitting the deck.  This has raised a question:-

Do I Glue/Solder the propshat tube into the P bracket or just leave it loose?

Anyone know where you can get P brackets made to order in the UK besides G Sitek?
Know its a fairly simple manufacturing job for a basic one, but don't have any metalwork facilities.
Don't have the dimensions to hand but think its about a 6mmOD shaft.

Thanks
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on October 03, 2012, 09:27:27 AM
I got mine from here
http://www.mobilemarinemodels.com/acatalog/Shaft_Supports.html
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: Stavros on October 03, 2012, 09:39:06 AM
Anyone know where you can get P brackets made to order in the UK besides G Sitek?
Know its a fairly simple manufacturing job for a basic one, but don't have any metalwork facilities.
Don't have the dimensions to hand but think its about a 6mmOD shaft.

Thanks

Give Steve a ring at Steve's Model Boat Bits he will do them for yo and a super fast del as well HIGHLY reccomended

Stav
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: sailorboy61 on October 03, 2012, 09:43:47 AM
Give Steve a ring at Steve's Model Boat Bits he will do them for yo and a super fast del as well HIGHLY reccomended

Stav

Merky buckets Stav

Thanks
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: red181 on October 03, 2012, 08:55:26 PM
Quote
Anyone know where you can get P brackets made to order in the UK besides G Sitek?
Know its a fairly simple manufacturing job for a basic one, but don't have any metalwork facilities.
Don't have the dimensions to hand but think its about a 6mmOD shaft.

what boat is it for, twin or single screw?

thanks
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: sailorboy61 on October 04, 2012, 04:09:07 PM
what boat is it for, twin or single screw?

thanks

Its a twin screw steerable kort tug.
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: Norseman on June 04, 2013, 09:50:47 PM
I have been progressing slowly but surely

Anything lately?  :}

Dave
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on June 04, 2013, 11:33:44 PM
I have started on the lift out cabin assembly and relocated the ESC and batteries again.
Water cooling pump has been fitted and now runs via a 3 position switch on the tx off 30% and 70%.  The esc and seperate 2 cell lipo for this now provides the receiver power

Sadly now the interior looks a mess and after seeing some of the masterpieces on here I'm loathed to post up pictures  :embarrassed:
Hoping to get it on the lake for some more testing at the weekend and maybe a few vids.... she has enough power to put herself vertical if I turn the soft start off the ESC even with the batteries almost at the bow.  Problem with that battery location was the boat sat nose down when static in the water and looked wrong.  The batteries have been relocated and the ESC reprogrammed so the problem is still there but careful use of the throttle is required


Problem is I'm trying to juggle too many projects right now :( I really should concentrate on one model at a time[size=78%].[/size]

Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: Norseman on June 05, 2013, 12:52:42 AM
I really should concentrate on one model at a time
Nope, I like you just the way you are  :-))

Dave
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on June 06, 2013, 12:08:36 AM
good cos the seawolf thread has been updated lol
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on June 08, 2013, 02:48:40 PM
Today I did a bit more on the huntsman.  The hull has been rubbed down, primed and is now awaiting topcoat

After an hour sodding about trying to get the waterline right so I could spray the blue on the bottom half of the hull, I took 10 mins to brows the net and decided its easier to just go for a one colour hull (all white) better to have a good one colour finish than a wonky looking waterline.
I have deviated from the instructions where it mentions leaving a lip on deck ply... I sanded mine flush and will ad a half round section around the top edge once planking is complete


I have built the superstructure and this has just received its first coat of primer.... to be honest it looks awful, going to sand it and fill it then prime it again.


Off to do more sanding......
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: pompebled on June 08, 2013, 04:40:44 PM
Hi essex2visuvesi,

I just found your build  and I have a few remarks:

- You should treat us with pictures of the build, please?

- The ESC you complain about is similar to the ones I use for competition speedboats and have no low end control to speak of, hence the abrupt starting, a 80 or 100A Car ESC, like the Easyrun has a much better low end control.
You may have to modify the blower section by removing the entire cooler en replace it with a (home made) watercooler, but you may get away with just the aircooling.

- The coupler in the picture is a potential weak spot in your drive train, either cover it  entirely with a piece of tightly fitting silicon tube, so the parts won't fly throught the boat when it (eventually) explodes under load, or replace it with a solid coupler, a universal coupler isn't designed for fast boats.

- How did you lay the piping of the cooling? In a boat that size, getting a steady flow without resorting to a seperate waterpump is very well possible.

Regards, Jan.
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on June 08, 2013, 04:53:18 PM
The coupler is a temporary measure.... I'm looking at having a cutom joint made up by a member on here.


I managed to deal with the ESC issues by programming the soft start and reducing the "punch"... now if you open the throttle wide it still takes time to get up to speed.
Water cooling is a pumped system running on a seperate battery and esc (This also supplies power to the RX).  This is controllable by a proportional lever on the TX from off to fire monitor lol.  The water cooling system will actually move the boat forward on full power)


I'll have to remind myself to to take pics as I tend to say to myself "I'll just do this bit and then takes some pics".... 2 hours later I'm 7 stages further on with no pics  :embarrassed:
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on June 10, 2013, 10:05:22 AM
Compared to many others on here my building skills are somewhat lacking  :embarrassed:
I guess as the the thing runs (very well) and doesnt leak through any of the holes I made in the hull is a plus point

Anyways how not to fit out a huntsman..... The equipment is all good and works well together just the fitting leaves a lot to be desired

Waterproof radio box containg the esc for the cooling pump, receiver and rudder servo
(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/2013-06-10-345.jpg) (http://s532.photobucket.com/user/Essex2Visuvesi/media/2013-06-10-345.jpg.html)

Inside of the hull.... the esc needs a mounting plate made up and the wiring tidying up
(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/2013-06-10-344.jpg) (http://s532.photobucket.com/user/Essex2Visuvesi/media/2013-06-10-344.jpg.html)

Outside of the hull rubbed down and painted.  Needs final wet sanding with 1000 grit and a coat of laquer.  I was going to go with the blue up to the waterline but couldn't get the waterline to look right so decided to go for an all white hull.  Better to have a decent looking single colour hull than a wonky waterline

(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/2013-06-10-343.jpg) (http://s532.photobucket.com/user/Essex2Visuvesi/media/2013-06-10-343.jpg.html)

cabins built lightly sanded and primed ready for final filling sanding then a top coat
(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/2013-06-10-342.jpg) (http://s532.photobucket.com/user/Essex2Visuvesi/media/2013-06-10-342.jpg.html)
(http://i532.photobucket.com/albums/ee322/Essex2Visuvesi/2013-06-10-341.jpg) (http://s532.photobucket.com/user/Essex2Visuvesi/media/2013-06-10-341.jpg.html)

Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: pompebled on June 10, 2013, 04:19:29 PM
Nice!

What submarine is/was in the box underneath?

Regards, Jan.
Title: Re: Build Log - Precedent Huntsman.. What Have I done?
Post by: essex2visuvesi on June 10, 2013, 04:23:21 PM
Robbe seawolf, the build log is here
I'm currently plucking up the courage to take a dremell to the tech rack

http://www.modelboatmayhem.co.uk/forum/index.php/topic,40289.0.html (http://www.modelboatmayhem.co.uk/forum/index.php/topic,40289.0.html)