Topic: Fairy Huntsman (Read 4976 times)

Mike R · « **on:** April 03, 2020, 03:04:38 pm »

Hi All
My Fairy Hunstman is in need of some TLC, I would like to upgrade the motor. At the moment I an running an old 12V DC motor with a lead acid battery with an old wire would speed controller. this makes the boat very heavy at the bow and needs lead in the stern to balance. The motor is a Torpedo 850, RPM 9778, power output 157W. What motor would you experts recommend and what ESC could I use and go to NimH battery. I am also going to upgrade the control from 27 Mhz as I have only 1 crystal set (yellow)
Many thanks in anticipation
Mike R

Tug Fanatic · « **Reply #1 on:** April 03, 2020, 03:58:56 pm »

What are the dimensions of the boat?

DaveM · « **Reply #2 on:** April 03, 2020, 04:11:31 pm »

Mike

There were two kit versions of the Precedent Huntsman 31. The prototypes of both were powered by I/C glowplug ('nitro') motors. The MFA850 is an awful thing - far too heavy and sluggish for either of the H31s, especially if you fit a lead-acid battery as well. A Fairey powerboat needs to plane, not bumble around like a canal narrowboat.

I'd suggest using a brushless electric motor and LiPo battery pack. For the smaller 34" model you need an outrunner which will put out around 500-600W @ 9-10,000 RPM and for the larger 46" model you should aim for 750-900W at a similar speed. The Veron Huntsman 28 is a similar size to the bigger Precedent model and much the same power-train will do nicely.
There have been several successful upgrades of both sizes done. If you use the Search button on this forum you'll fall over most of them. I'm afraid I can't advise on specific motors as my own Huntsman 31 is just 1/16 scale - but it don't 'arf go nice! https://www.youtube.com/watch?v=uw1C8SfZPS4&feature=youtu.be

Dave M

Leaky Bottom · « **Reply #3 on:** April 03, 2020, 06:34:24 pm »

I've got a Precedent Huntsman 34" wooden hull which had a Merco 35 ic engine, I have since converted it to electric power with the following set up -:
Motor -: hyperion Z3025-08 985kv
Speed control -: hyperion 50 amp aircraft controller (no reverse)
Battery -: 3 cell 3000 m/a lipo
Prop -: X45 plastic prop

The performance is equal to the ic set up

SteamboatPhil · « **Reply #4 on:** April 03, 2020, 07:35:37 pm »

I have seen Mr M's.....it don't just arf go it moves like poop through a goose after a curry and bad real ale night

Mike R · « **Reply #5 on:** April 04, 2020, 08:43:50 am »

Good Morning All
The dimensions of the boat are 34" by 11"
I appreciate the replies so far and I have a look on the internet for brushless motors but I was surprised at the number of items for sale and I felt very much out of my depth. Leaky bottom gave me his set up but I would like a few more ideas as that ESC did not have reverse. looking forward to your replies and stay safe all of you
Mike

ChrisF · « **Reply #6 on:** April 05, 2020, 10:48:22 am »

Hi Mike

For boats of this type and weight you want something reasonable torquey but not too high revving so something in the 900 to 1100 Kv range or thereabouts would be suitable.

I'm building a 31" Huntsman and am going to use an Overlander Tornado Thumper V3 3548/05 900KV - Brushless Outrunner RC Motor which on 3S LiPo should give good performance.

I'm also building a 33" Swordsman, but that has a bigger, beamier hull and so I'm using an Overlander Tornado Thumper V3 4250/06 800KV - Brushless Outrunner RC Motor in that. Probably a bit overpowered but that doesn't matter as the motor will have an easier time and the speed can be kept in check with the throttle! Both of these motors need a 60A ESC.

I've standardised on Overlander but Leopard do some nice motors as well and their
LC3542-5T 1080KV Outrunner Brushless Motor Leopard Hobby could be ideal. Available from Component Shop and they have Leopard ESC's as well which I'm going to use.

Chris

DaveM · « **Reply #7 on:** April 05, 2020, 11:23:48 am »

My 36" 1/8 scale Huntress is almost exactly the same size as the 1/11 scale H31, although she has a much wider bottom! https://www.slecuk.com/boat-kits?product_id=532
I fitted a Turnigy 3542/6 1000kv outrunner and the 60A Marine ESC from Component-Shop - all running on a 5000maH 3S LiPo pack. A 45mm 2-blade prop will terminate the power-train nicely, although I used a 3-blade scale Propshop job for OTW tests. The 3548/05 motor Chris suggests would also be a good choice.
Dave M

Mike R · « **Reply #8 on:** April 05, 2020, 05:16:23 pm »

Wow, there seems to be no end to the amount of info out there in the big wide world and you guys are so willing to give advice to a beginner like me. After reading all the replies and touring the internet (what else is there to do in the current climate

) I have found this combination- Mtroniks G2 Hydra30 system from Cornwall Model Boats. Would this system be OK for my Huntsman. When I change the motor would I have to change the motor mount?

Stay safe
Mike

Leaky Bottom · « **Reply #9 on:** April 05, 2020, 07:15:28 pm »

If you are going to change the motor you could end up having to change the motor coupling as well, I would check on the size of the inner propshaft first, if it is a old model the shaft could be a imperial size with BA threads, as mine is. Trying to get BA threaded couplings and new propellers will be almost impossible.

ChrisF · « **Reply #10 on:** April 07, 2020, 10:28:19 pm »

Mike - the kv is OK but from the Mtroniks site the diameter of the motor is only 28mm. Myself and Dave have suggested at least a motor diameter of 35mm.

I see that they do a 50 version. No details of the motor size on the site but being 50amp I'm guessing it would provide sufficient power. I'd contact Mtroniks and ask them what the motor diameter and length is and what the power output in watts is.

Chris

SteamboatPhil · « **Reply #11 on:** April 08, 2020, 06:55:33 pm »

If it as old as Leaky bottom has suggested the threads will be either 2 or 4 BA, I do have a collection of props in both sizes and would be happy to make you a coupling.

ChrisF · « **Reply #12 on:** May 05, 2020, 05:53:56 pm »

Soon lost interest?
Chris

DaveM · « **Reply #13 on:** May 05, 2020, 06:12:58 pm »

Quote from: ChrisF on May 05, 2020, 05:53:56 pm

Soon lost interest?
Chris

Maybe the dreaded lurgy got to him? Let's hope not, eh...

Just remembered Major Denis Bloodnok's old enemy "The Red Bladder"! https://en.wikipedia.org/wiki/Major_Bloodnok
Happy daze - to all of you who remember laughter......
DM

Mike R · « **Reply #14 on:** May 05, 2020, 08:45:27 pm »

Hi All
Not lost interest but other things have conspired to move this project back somewhat. I am intending to restart this project again, hopefully when the lockdown is over and the other projects have quietened down.

Mike R · « **Reply #15 on:** June 06, 2020, 09:19:50 am »

Good Morning All
At last things are getting quieter and I can at last devote a little time to the boat. After the replies received, may be someone could explain ( in simple terms) why the difference in a motor size , 28mm versus 35mm is recommended, does the extra 7mm make a difference? thanks all

DaveM · « **Reply #16 on:** June 06, 2020, 09:32:41 am »

A larger diameter motor will generate more torque than a smaller one, and thus more power. The other factors are the voltage used and the length of the can; the latter indicating longer magnets and more room for windings which will also increase the power available. You can compare the specifications of the various sizes of the Leopard series on Component-Shop's website here https://www.componentshop.co.uk/brushless/motors/outrunner.html
Other suppliers and brands are available.

DaveM

Mike R · « **Reply #17 on:** January 16, 2021, 01:55:51 pm »

Hi All
After a strange year and a lot of stops and starts I thought I could give you an update of my project. Due to budget I went for a 30A ESC and a smaller motor. I have fitted the motor and associated controllers and found that the weight of the boat has gone down considerably so there will be some ballasting to be done and then there will be some OTW testing when we can sail again. I would like to install a rail at the bow but have no idea on how to build and fit it, suggestions welcome. I will post some pictures when I get around to it
Stay safe everyone
Mike

ChrisF · « **Reply #18 on:** January 16, 2021, 03:39:09 pm »

Mike

Good that you're back on the Huntsman again. My builds are a bit stop and start as well!

Even with a reduction in weight you shouldn't need any ballast unless it is sitting down at the front which these boats are prone to do because of the shape of the bow. A lighter motor will help with this. Try it in the bath and it should sit around the chine rail.

As for the bow rail have a look at RadioJoes Hunters Moon build.

Hunter's moon build (modelboatmayhem.co.uk)

Chris

Mike R · « **Reply #19 on:** February 08, 2021, 12:48:11 pm »

Hi All
The work on my Huntsman progresses, hopefully a picture attached. I am hoping to put on a mast but the plans have been lost in the mists of time, would anybody be able to supply any dimensions and measurements ? I have performed some OTW tests ( the bath) and it still floats allbeit a little higher than before, not a bad thing. The new control system seems to function well.
Stay safe everyone

Mike

ChrisF · « **Reply #20 on:** February 08, 2021, 04:51:57 pm »

Hi Mike

Extract from the early Modav drawing attached from which you can interpolate the height - looks to be about 2 and a quarter x the height of the screen . It used obechi but mahogany is often used as per my, now sold, 47" Huntsman. The cross brace can be timber, brass or stainless steel, whatever you fancy really. Obviously you can add a bit more shape to the mast if you want to.

Hope this helps.

Chris

pompebled · « **Reply #21 on:** February 20, 2021, 10:48:29 am »

Quote from: Mike R on January 16, 2021, 01:55:51 pm

Due to budget I went for a 30A ESC and a smaller motor.

Hi Mike,
You don't mention which motor and ESC you installed, if it's the Mtronics combo that was shown in this thread earlier, you may be dissappointed when it comes to the performance.As mentioned in other replies, there's nothing wrong with having 'too much' power installed, that's where the ESC comes in.
I understand why you didn't go for the 50A Mtronics combo, it may be very good, but also very expensive.
If, after the watertrials, you want to upgrade, consider this motor:
https://nl.aliexpress.com/item/10000356089281.html?spm=a2g0o.productlist.0.0.4e3e312e43rxNh&algo_pvid=96dee132-837d-4e2a-b387-2cbbc48a6a9f&algo_expid=96dee132-837d-4e2a-b387-2cbbc48a6a9f-1&btsid=2100bde316138168869313377e383a&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
Or this one:
https://nl.aliexpress.com/item/4000537633857.html?spm=a2g0o.productlist.0.0.4e3e312e43rxNh&algo_pvid=96dee132-837d-4e2a-b387-2cbbc48a6a9f&algo_expid=96dee132-837d-4e2a-b387-2cbbc48a6a9f-0&btsid=2100bde316138168869313377e383a&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
Combined with this ESC:

https://nl.aliexpress.com/item/1005001501125259.html?spm=a2g0o.productlist.0.0.28b74a26kaLGhN&algo_pvid=d8995bec-d63e-49ee-9858-60ef755acaa0&algo_expid=d8995bec-d63e-49ee-9858-60ef755acaa0-3&btsid=0b0a119a16138171332026548e546f&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
And this programming card:
https://nl.aliexpress.com/item/1005001840986127.html?spm=a2g0o.productlist.0.0.28b74a26kaLGhN&algo_pvid=d8995bec-d63e-49ee-9858-60ef755acaa0&algo_expid=d8995bec-d63e-49ee-9858-60ef755acaa0-30&btsid=0b0a119a16138171332026548e546f&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

I'm using the second motor in my 110 cm M.A.S., running on 4S it performs like this:

https://youtu.be/JTYDvmR4p8U
I do use watercooling on the ESC and have a watercooled motormount, to keep these items cool during my long runs, up to an hour, or two, at walking speed.
Looking forward to hearing back from your sea trials.

Regards, Jan.

News:

Author Topic: Fairy Huntsman (Read 4976 times)