Fairey Huntsman

[BRYAN ASTONParticipant @bryanaston57723]

Greetings all

I have the largest Huntsman and I have tried over the years to get it up on the plane,I have tried various motor combinations of motor , brushless and brushed ,speed controllers and batteries, Could any expert suggest a setup which would give me the improvement in performance I would like ,before I get to old to lift the boat.

yours in anticipation

bryan

[BRYAN ASTONParticipant @bryanaston57723]

Increasing performance

[Dave MilbournParticipant @davemilbourn48782]

Bryan

The latest incarnation of the kit suggests a Turnigy G60 brushless motor running on a 6S LiPo pack. That will produce around 2BHP. The HP61 glowplug motor in the1972 prototype produced just a bit more than half of that through a stock X55 plastic prop and it planed beautifully. No doubt Harry Smith will be along to add a comment from his experience. G60 brushless motor

DaveM

Edited By Dave Milbourn on 12/09/2019 17:53:20

[Chris FellowsParticipant @chrisfellows72943]

Hi Bryan

What brushless and battery combination have you tried as I would have thought a brushless would give you the performance you want no problem.

I've got one of the same boats and have already taken the 7.2 volt lead acid down the tip. I'm going to replace the 850 motor with an Overlander Tornado Thumper V3 5045/10 720kV and a 4S LiPo which I reckon will give it good performance. If not I will increase to 6S.

Chris

Edited By Chris Fellows on 12/09/2019 17:38:44

[BRYAN ASTONParticipant @bryanaston57723]

Greetings Chris

Thankyou for replying

the current motor is Turnigy D3548/1100kv , out runner ,battery is a 9.6v Nihm

I have used in the past an Etronix 2950kv inrunner and 12v Nihm and various other brushless motors, 60 amp esc used every time, whatever I use the result is the same, very disappointing performance.

Any suggestions?

[BRYAN ASTONParticipant @bryanaston57723]

Dave

I will take your suggestions on board, I never used a Lipo battery, but I will consider a G60 motor.

regards

Bryan

[Dave MilbournParticipant @davemilbourn48782]

Bryan

LiPos are NOT the work of the devil.

I've been using them for several years now and I have no qualms about them whatsoever. Pound for pound they are a lot more efficient than the equivalent NiMH pack, and that's what you need for a planing model boat. All you need do is to follow sensible and well-published advice about storage, handling and minimum discharge voltage. It's not a mystery.

BTW I am using the identical motor to the one you mention in a smaller powerboat [36" c/w 46"]. I reckon it should just about do the job, but not much more. That G60 should be OK + a fair bit beyond in a 1/8 scale Huntsman 31. If it were mine then that's where I'd start.

Dave M

[BRYAN ASTONParticipant @bryanaston57723]

Dave

I will have a look at the lipos

thankyou

Bryan

[Chris FellowsParticipant @chrisfellows72943]

Hi Bryan

I'm not surprised you aren't getting the performance you want from that brushless motor and battery. Brushless punch above their weight but the 1:8 Huntsman 31 is a big heavy boat and as Dave says needs a bigger more torquey motor and more volts, a 6S LiPo is going to provide 22.2 volts which is way more than you have been using so far. That inrunner is even more unsuitable as they are less torquey and more suited to lighter high speed craft.

The G60 is certainly the way to go and should have power in hand and allow use of a decent sized prop I.e. 45 or 50mm.

I was nervous of LiPo batteries initially following some of what I'd read about them but as Dave says treat them properly and they are fine. This includes getting a good quality balance charger which will make charging and storage charging them (when not being used for a while) simple and safe.

[BRYAN ASTONParticipant @bryanaston57723]

Chris and Dave

I am digesting both your suggestions, much obliged.

regards

Bryan

[BRYAN ASTONParticipant @bryanaston57723]

Chris and Dave

What Mah should I aim for in a Lipo.

Bryan

[Chris FellowsParticipant @chrisfellows72943]

Personally I go for those around the 3500 mark. For future purchases for my current builds I'd like to get some 5000 to increase the run time. Just looked at 6S 5000 mah prices at Component Shop, ouch! My other boats will only need 4S though which aren't as bad.

Edit: Just been having another look at prices and think I'll limit myself to 4000 mah max.

Edited By Chris Fellows on 14/09/2019 12:11:25

[Dave MilbournParticipant @davemilbourn48782]

Bryan

As much as you can afford!

DM

[Paul TParticipant @pault84577]

As in all things 'you get what you pay for'

[Dave MilbournParticipant @davemilbourn48782]

As in all things 'you get what you pay for

Unless it's a D*m*s kit…..or a B*ll***s……

DM [Burnt twice….still sore!]

 

 

Edited By Dave Milbourn on 14/09/2019 16:56:20

[BRYAN ASTONParticipant @bryanaston57723]

Chris

I have been looking at Lipo chargers and they seem confusing, some need to connected a 12v battery to charge the Lipo .

Can you recommend a charger or explain the differences.

regards

Bryan

[Chris FellowsParticipant @chrisfellows72943]

Yes, I was confused by that at first. Those enable you to charge your LiPos at say the lakeside from e.g. a car battery. I don't know anyone who does that though!

The one I have, I bought from Component Shop and it's a Turnigy Accucel 6 like the one shown below, though mine is the 50 amp one. Interestingly the 50 amp one now says it will charge 1-5 LiPos whereas mine will do 1-6 LiPos. They have either changed the spec. or it's a typo., – the detailed spec. does say 1 – 6 though. I'd buy the 80 amp one now anyway.

As you can see it includes the mains power supply and transformer. I use mine for charging LiPos and NiMH batteries and once I'd got my head around the instructions find it easy and safe to use. It's a balance charger, which means that it monitors and charges each cell in the LiPo pack so that each are adequately charged and whilst charging you can see what the individual cell voltages are and the final voltage of the battery once it is fully charged. Also you can use it for storage/maintenace charging of your LiPos when they aren't going to be used for sometime.

I find it a good piece of kit but there are more expensive and more powerful ones if needed.

 

Edited By Chris Fellows on 14/09/2019 23:21:05

Edited By Chris Fellows on 14/09/2019 23:26:39

[Malcolm FraryParticipant @malcolmfrary95515]

Some are the complete item with mains going in one end and a LiPo connection at the other. Some are just the clever bit that re-arranges a 12 volt supply to do a balance charge. Some are split because the technology for converting mains to a dumb 12 volts is well established and can be bought in bulk. The actual bit that connects between the 12 volt DC supply and the battery is very individual to each manufacturer. Not having to certify a mains unit cuts costs enormously. It gives the end user the choice of using your own 12 volt supply, be it a 12 volt battery, a car socket, or a mains driven power supply.

Could be a way of final charging from storage to full on the drive to pool. Depending on length of drive and size of battery and capabiliy of charger.

[BRYAN ASTONParticipant @bryanaston57723]

Malcolm

Thankyou for the explanation , I will have another look at them.

Regards

Bryan

[Dave MilbournParticipant @davemilbourn48782]

Just seen this on the Mayhem forum:

The Turnigy G60 brushless motor was discussed on a previous thread as being good for the vintage style 48" planing hulls.

The G60 has been considerably reduced in HobbyKing's current cyber sale from £49.10 to £33.93, a 30% off (saving £15.17).
It says they are in stock in the UK.

**LINK**

Thanks to Mr Lownotes for the link.

Dave M

[alan burgessParticipant @alanburgess78098]

Posted by Dave Milbourn on 18/09/2019 15:56:08:

Just seen this on the Mayhem forum:

The Turnigy G60 brushless motor was discussed on a previous thread as being good for the vintage style 48" planing hulls.

The G60 has been considerably reduced in HobbyKing's current cyber sale from £49.10 to £33.93, a 30% off (saving £15.17).
It says they are in stock in the UK.

**LINK**

Thanks to Mr Lownotes for the link.

Dave M

OO err missus…………Thankyou Dave………..I neglected to put it on here earlier !

[BRYAN ASTONParticipant @bryanaston57723]

Dave

Noted

[Ray Wood 3Participant @raywood3]

Hi all,

Such a bargain 😀 I don't need one at present, but will buy one anyway who knows when it maybe handy.

Regards Ray

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