Daniel. There are 500`s and 600`s and not all are created equal. The graupner speed 500 motor in nothing special, and there are loads of 600s so it would depend on what you buy. A Graupner speed 600E ECO is not a ferocious motor and I have used them to upgrade a bit from a "normal" cooking 500 and would go ok in your boat.

As you are paying shipping and possibly expensive import tax, a slightly more powerful motor might be a good choice, as it will guarantee a reasonable performance…nothing worse than paying out all that money and being disappointed with a weedy 500.

Another avenue, and this is frowned upon generally as the motors are obviously unknown quantites, is using motors from broken electric drills and so on. These are usually about the 500 size, and you may find one locally that goes ok at a fraction of the cost of importing one??? Screw fixing holes are likely to be about the same so installing and then swapping if reqd would be quite easy. Trying the motor straight across the battery with an ammeter or watt-meter (in the boat, in the water and with a prop on!) would show you instantly whether the motor was just too juicy or worth a try. This option would depend on how expensive it is to ship to Malta.

Also, a brushless motor might be worth considering, Kv matching the sort of revs a 500 would acheive, with the battery you would be using. If reverse is not an issue, aircraft speed controllers are cheap but will need a bit of ventilation through the boat, easy enough to arrange..open hatches/doors and so on. Do you get your aircraft stuff locally or is everything imported?

Just as a suggestion.

Ashley

**LINK**

Daniel

I would recommend using the installation shown for Shamrock (the top diagram) in conjunction with the 540/1 motor, a P80 speed controller and a P95/1 fuse board. On 7.2v the model would be fine on something around a 35mm 3-blade scale prop. There's plenty of scope to increase the speed if required by upping the voltage. Component Shop will ship to Malta. Graupner motors are getting very rare these days. I have three new 600 ECOs and a 720 Torque which I wouldn't sell for any money!

Dave M

Edited By Dave Milbourn on 26/05/2014 15:43:28

hi ya Daniel, when I quoted the rpm I was honestly under the impression that I had originally fitted a Graupner speed 500 in the model which is rated at 17,600 rpm on 7.2 volt – it wasnt until I was having an eyeball at the model I built that I realised I had put the old Graupner motor in it. So what I will need to do now is go into the loft again and take some more pics.

if I were you, I would try and aim for 15,000 rpm,

Aye

John

Daniel, if you have a look in my album there are a couple more photographs of her under the heading Boats.

John

Supressing a motor is never a bad idea. Interference does not just get into the system through the radio aerial, it can be picked up by other wiring. Also, if you are not sailing alone, you might be causing interference to others nearby.

A fuse between the battery and speed control guards against the chance of a fault in the speed control turning your boat into a flaming wreck. While the ESC might well have over current protection, it cannot protect itself against internal faults which can happen.

hi ya Daniel

if you check your personal messages on Mayhem you will find I have sent you a link where I got the rudder from. It gives yee the sizes of rudder on that link.

aye

john

Hi ya Daniel whilst reading through your last PM, i noticed you asked about the weight – should you increase it for using in the sea – I wouldnt ncrease the weight of the hull it does perform well in rough water.

heres a thing now though, when you actually begin to build it why dont you put it on this forum so we can have a look and see – you will find its quite easy to download pics on this website you just create an album and download the pics from your album to the build

you dont have to worry about resizing the pics or anything like that like you do on certain websites the other bonus point about putting the build on this forum is that other people will read it and you may come across one or two problems which you can air on this forum.

and others may come up with another alternative answer than what I would give and you may find it will suit you down to the ground and it may be easier for you. When you have finished this build and if you like this style of build of semi scale – have a look at what else Glynn Guest has done – he has done some nice models – Also have a look at the Swordsman that Dave Milbourn drew – the build for that is on Mayhem which I myself made a few years back – another lovely model to build and sail. This particular model has travelled a few times with me on holiday as its a model which is easy packed up and sails well anywhere.

Ived built many a scale warship come other types of model which I enjoy doing but I really love doing these semi scale ones as there seems to be an extra bonus and zing from them.

aye

john