Model Boat Mayhem

Mess Deck: General Section => Model Boating => Topic started by: benidormbob on November 19, 2017, 07:38:12 pm

Title: working radar
Post by: benidormbob on November 19, 2017, 07:38:12 pm

 Hi all,  Looking to put a working radar on this fire boat. Any ideas please as there is no scope to hide a motor ?  Thank you

Title: Re: working radar
Post by: BFSMP on November 19, 2017, 08:03:11 pm

I will be interested to see this as well Bob. how small can motors go and what sort of gearing and voltage does one use.


Jim.

Title: Re: working radar
Post by: ray123 on November 19, 2017, 08:36:42 pm

have a look  at  www.bauer-modelle.com  on the left side look for modern fittings  'click'  then look for radars


there is a few on there that have a very small motor inside the body of the radar  ' i have one but haven't fitted it yet

Title: Re: working radar
Post by: BFSMP on November 19, 2017, 08:44:58 pm

thank you Ray,


I'll have a look at those..............no boat to fit one into but just interested in the wizardry of micro electronics.


cheers.


Jim.

Title: Re: working radar
Post by: rnli12 on November 20, 2017, 06:50:05 am

Try the component shop I have some really small drive units on my models which would probably fit on here.

I think they are micro drive units, call them for advice.

Rich

Title: Re: working radar
Post by: Klunk on November 20, 2017, 06:51:38 am

old mobile phone vibrator motor

Title: Re: working radar
Post by: T888 on November 20, 2017, 07:12:09 am

Hi I use these, from
https://www.precisionmicrodrives.com/product-catalogue


Dia 6mm
Length 20.8
Volts 3v
RPM 28 @ 3volts

Title: Re: working radar
Post by: Plastic - RIP on November 20, 2017, 11:49:28 am

Not sure how big the model is but have you ever seen the Lego MicroMotor?
It's tiny, torquey, geared right down so ideal for radars and fits inside a 2x2 Lego brick housing.
DC max 9V but runs on very low voltages at slower speeds

Quite rare but very useful. (It's used in the old Lego Technic Space Shuttle to open the satellite's solar panels).

Title: Re: working radar
Post by: benidormbob on November 20, 2017, 11:54:53 am

Now that looks interesting Thank you :}

Title: Re: working radar
Post by: JimG on November 20, 2017, 12:31:01 pm

As an alternative, you already have a vertical shaft going to the two lights. This could be arranged to be driven by a suitable motor inside the superstrucrure. Fit a small pulley under the radar, a pulley on the shaft and use a small rubber band to connect.
Jim

Title: Re: working radar
Post by: benidormbob on November 20, 2017, 01:57:13 pm

Thank Jim Looked at the lego motors They are selling at anything from £20.00/£35.00. It looks like they are a sought after item

Title: Re: working radar
Post by: Plastic - RIP on November 20, 2017, 06:22:36 pm

The trick with the Lego motors is find out which models it is included in and look for the unpopular ones. There's a breakdown truck  (set 6484) with it that can go for £10 for the whole model - motor included.

Title: Re: working radar
Post by: nemesis on November 20, 2017, 08:56:24 pm

try a flexible drive,ie a bicycle brake cable or gear change cable, its a lot slimmer. nemesis