Model Boat Mayhem

Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: john44 on August 16, 2017, 05:01:51 PM

Title: Club 500 speed limiter
Post by: john44 on August 16, 2017, 05:01:51 PM
hi guys,
 we have club 500 boats that we would like to use so that youngsters who come down
To the jetty with their parents can have a go at sailing one.
Is there any way electrically/ electronically, I could
Fitt a switched resistor on the throttle pot to halve the speed when used for kids, and switch
Back for normal running speed for adults Or a switched reducer in the boat,
If so what resistor do I need and how / where do I wire it to.


Hope you can help



Title: Re: Club 500 speed limiter
Post by: Big Ada on August 16, 2017, 05:19:07 PM
What about fitting those plastic round plates over the Throttle stick, or make something similar to restrict stick movement.

Len.
Title: Re: Club 500 speed limiter
Post by: Captain Flack on August 16, 2017, 06:30:06 PM
Can you not use the EPA on your TX, assuming you have them?
Title: Re: Club 500 speed limiter
Post by: T33cno on August 16, 2017, 06:31:59 PM
Many transmitters can be set to reduce the throttle stick effective travel within the servo settings menu.
Typically my Spektrum is at 100 by default but can be adjusted by 50 either way.
Title: Re: Club 500 speed limiter
Post by: steamboat66 on August 16, 2017, 07:35:21 PM
all of this depends on what speed control is used. if they are electronic, then limit on the TX as stated.
Title: Re: Club 500 speed limiter
Post by: john44 on August 16, 2017, 07:44:39 PM
Hi guys, the boats work of Planet tx & Rx. I don,t want to risk my Spectrum tx being dropped
The planet has survived a few mishaps so sadly no programmable end points.
Title: Re: Club 500 speed limiter
Post by: T33cno on August 16, 2017, 07:49:39 PM
The boat is pretty unexciting when not planing at full speed. Don't be a meanie  {-)
Title: Re: Club 500 speed limiter
Post by: john44 on August 16, 2017, 08:25:58 PM
The boat is pretty unexciting when not planing at full speed. Don't be a meanie  {-)
Careful T33cno or I will have to have a word with mr Reffin about revoking your membership  {-)
Title: Re: Club 500 speed limiter
Post by: T33cno on August 16, 2017, 08:28:11 PM
Use the Spektrum with a neck band  :-))
Title: Re: Club 500 speed limiter
Post by: barriew on August 17, 2017, 06:49:53 AM
Is this what you want?

http://www.modelboatmayhem.co.uk/forum/index.php/topic,56790.0.html (http://www.modelboatmayhem.co.uk/forum/index.php/topic,56790.0.html)


Send me an email or PM if interested.


Barrie
Title: Re: Club 500 speed limiter
Post by: Captain Flack on August 17, 2017, 07:56:06 AM
Slightly off topic, but my grandson uses a neck strap with his pistol grip TX, just in case O0
Title: Re: Club 500 speed limiter
Post by: malcolmfrary on August 17, 2017, 08:58:01 AM
Simplest brute force and ignorance way might be to fit a high wattage resistor in series with the motor.  Wire a switch across it so it can be shorted out for normal use.  A bit of experimentation might be needed to get the best value, a dead toaster or hair dryer or similar will provide the resistance wire, a "choc block" connector will mount it nicely allowing the best length to be selected.
Or use a 5 cell battery pack.
Title: Re: Club 500 speed limiter
Post by: john44 on August 17, 2017, 09:09:27 AM
Hi guys, neck straps are used with both transmitters but they still tend to drop them occasionally.
I think the easiest way is to fit discs as already stated.
If I can,t reduce the speed in the tx throttle.
Title: Re: Club 500 speed limiter
Post by: Martin [Admin] on August 17, 2017, 12:15:07 PM
 
Mechanical Tx Limiter?!

https://youtu.be/zfzpZEqWG6s?t=3m28s

https://www.flitetest.com/articles/limiter-discs
Title: Re: Club 500 speed limiter
Post by: grasshopper on August 17, 2017, 03:35:57 PM
I'd go the disc on the Tx method, I would also consider changing the prop to something like a P30 instead of the X prop I think comes with the kit, you'll lower the current draw and increase the run time.
Title: Re: Club 500 speed limiter
Post by: Netleyned on August 17, 2017, 03:42:32 PM
Changing the prop would be a problem
if switching from young to old.
Stick a lower voltage battery in for
the youngsters as Malcolm suggested
Simples!


Ned
Title: Re: Club 500 speed limiter
Post by: john44 on August 17, 2017, 09:26:55 PM
I would like to thank all that read and answered my post,
With many thanks the problem has been solved by barriew
Just goes to show what a great forum this is, with members
Willing to help where they can.