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KingMax SW22HV Sail Winch


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Has anyone tried this winch  https://www.componentshop.co.uk/68g-digital-sail-winch-servo-6-turn-programmable.html . If so any feed back?

Tried the other KingMax SW6114MD with good results in a IOM for a sub £30 winch. Was wondering about using this latest edition to the range in a Marblehead as spec looks good for a sub £50 winch. 

Programmer now available from Component shop so would not have to worry about damaging boat as could happen just using radio endpoints to control winch position/turns.

Thanks Eric

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Evening Eric

I have consistently used the Kingsmax winch in my IOM, US1m and previous RG for the last 5 years. It is a great little winch, but I would not use the winch in anything bigger than an IOM.

Admittedly, the Kingsmax is not as fast as an RMG, but you as the skipper would learn to manage the speed and timing, when operating the yacht’s sails during a race.

As for the new spec winch, I can’t see me using that in a competitive Marblehead. However, I’m for being educated.

 

JT

Edited by John Taylor
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John

As stated I have used the Second KingMax I listed in an IOM. I have also used it on a Marblehead which is only fitted with swing rigs. The only issue was my own fault when I left a boat with the power switched on and had not programmed properly and the sheet line was locked so winch continually pulling so eventually burnt out winch. Since then no more issues.

Now the purpose of this Post is that Component Shop have added another KingMax Winch which I had only seen available in the USA. This winch is more powerful and with 7.2v applied gives two turns in less than one second, and only weighs 68g. I was looking for feed back on this new I believe to the UK model.

For my IOM yachts which I sail more regularly, I either use an RMG or one of the Ken Binks suppled monster power arm winches which is very fast.

Eric

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This appears to be a new 'High Voltage' version of the previous 6114 winch (of which I have two).  It has presumably been produced to cope with the fact that most people are using LiFe / Lipo 2-cells these days.  If you stall a 6V servo (rudder or winch) with a fully charged LiPo / LiFe, then it will probably burn out: as Eric has found out.

I am currently using a 6114 in a 10R without any problems but there are a couple of things worth knowing.  If you use LiPo /Life then I would recommend you install an external BEC (or uBEC) to protect your servos.  It's not as fast as an RMG but fitting the bigger metal drum helps.  Personally I think RMGs are pretty crude and overpriced as well as being very noisy (plastic gears on a brass shaft?), but there aren't many alternatives. 

 

 

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I have also been using King Max 61G winches for quite a few years now. One Metres, Marblehead, "special" 6M, Mini 40 and currently on my "pieces of eight" 10R.

The new version, 68G has more torque, is a bit faster and Waterproof. 

I have done a quick calc using One Metre sheeting length and 6Volts for both. Sheeting times are: 61G 1.71 secs - 68G 1.49 secs. Torque: 14.5 - 17.8 Kg/cm respectively. Each using the new metal drum, 30mm dia, and a great improvement over the old plastic one 25mm dia.  Adds an extra £6 but worth it.

BUT !!!!! £27 now £47 However looks as though the 61G may not be available now.  Still cheap though. 

Richard

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Dear Eric and John,

I found the discussion about King Max winches very interesting as one of the things that we discussed on the way back from the M Worlds in 2018, was how to improve our boats and as we have been using the trusted Jackson winch, which then could not be repaired, I decided to use the basic two turn King Max SW 4805-2 PA winch, which gave the required travel 210 mm for my UP swing rigs and only cost £11 from the Component Shop, just as a trial. The trial was much more than that and lasted over 18 months with complete reliability. As John Taylor mentioned my King Max winch is slow at just over 1.5 seconds, but with practice you can adjust your buoy rounding technique to minimise the slowness.
In the process I redesigned the BOOT to relate to the smaller winch in order to be able to put ALL the weight below the waterline, rounding the base from rectangular to circular to match hull shape as shown in the attached.

As I always use my LAM (Leech Adjustment Mechanism) on my A rig I selected the most basic Futaba T6L TX and RX because it has analogue trims and so I can see/feel exactly where the trim is being adjusted. The trial started in September 2018 and went right through the incredibly windy 2019 season with absolutely no problems at all with regard to reliability. What I like about it is that it cannot overrun, it is always been a problem with my previous winches when something goes wrong.
As it only weighs 45 g, it makes the complete BOOT weigh only 129 g (+65 g mh battery) this definitely achieved an improvement, to which the Hollom/Stollery Winder fin adds the further improvement, which keeps the DIY made UP equal or better than the best.

Cheers, Roger

2021-09-23 BOOT 2 details with Futaba T6L receiver.jpg

2018-09-22 BOOT 2 completed.pdf

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  • 2 weeks later...

I have to presume no one on here has tried the KingMax SW22HV. as no feed back.

Roger, going back in time well before the KingMax SW6114MD & SW6109MD winches were available (Using Vigor or Eurgle winches at that time) I tried out the lesser priced KingMax winches both the 45gm and 55gm. (6 turn version generally). Both of these had similar issues, first off they were slow to pull sheets in making gybing or goose winging more difficult and the second problem was as you approached the limit of travel (set on radio end point adjust) they slowed noticeably even more for the last 20mm or so of travel. Both these traits caused issues while racing an IOM. Does this still happen?

I then tried the original Titan Winch (Square Case) which I did like. (Still have this and a round cased Titan which is fitted to one of my Marblehead's.) As I stated earlier I am now either using a RMG or Hitec arm winch in IOM's but looking at weight saving for a Marblehead, hence the request for feed back on the 68gm winch. I do like the SW6119MD but thought the extra spec on the SW22HV could be worth the 7gm penalty. (Other penalty £20 in cost but still less than £50) Extra winch weight would be offset by use of LiFi or LiPo batteries.

The one KingMax I burnt out was as I said in previous post not the winches fault (Only using 6v NiMh) but a setup issue on travel, and then leaving energised for a long time on the bank.

Eric

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  • 3 weeks later...

I took an SW6119MD apart the other day and managed to read the chip numbers.  To cut to the chase, the MOSFETS are rated at 20V @ 7Amps so the electronics should be fine on LiPo / LiFe batteries.  The motor might be the weak spot but should be OK as long as you don't stall it.  Presumably they will operate faster and give more torque at higher voltages too.  My guess is that the 'HV' version has a more powerful motor but the same electronics / gearing- hence the weight increase.

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Hello I sail at Etherow and we have approx 20 IOMs in the club, we have been using  the 61 grm winches for some time now without any problems,. We found that if you get the HITEC drum and drill the centre out then the small drum supplied fits straight into it, we just fasten them together with a couple of screws and file the underneath flat, this then improves the speed considerably and is bigger that the Kingmax alloy drum, We don't often get high winds but we have had no failures  and they're coping well with LIFE batteries controlled through Flysky 6 channel  TX and RX. Last Tuesday we had 16 IOMs sailing and  I would think 12 were using the Kingmax winch and we sailed all day with no battery problems. We have also used the lower turn winches without any problem three of us have just bought the 68 grm winch as there have been supply problems in the past.

 

 

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Stephen

When you start using the 68gm winch can you please keep us informed as to how it performs with possibly comparison to the 61gm. As with your club we have members using the 61gm version on IOM's, Marblehead's and even a 10rater. I have personally tried both the KingMax Ali drum or an Eurgle drum to good effect on an IOM and a Marblehead with swing rigs.

I was contemplating fitting the 68gm version into my main Marblehead with a larger drum to increase sheeting speed over the fitted 61gm winch to see how it performs.

Most of my Marblehead's were originally fitted with Whirlwind Winches so the 61gm version was a performance upgrade! At less than £50 I thought the 68gm may be a worthwhile further upgrade. (Too many Marblehead's to contemplate upgrade to RMG winches on all hulls)

Eric   

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  • 1 month later...

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