Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length.

[daveorgan]

hi dave from bristol here
please can anyone help me will these motors be ok for my 48 aerokits solent
 
mfa marlin high torque motors

Part Number 776
Voltage 12v D.C.
R.P.M. 5100
Torque 253 M.N.M.
Power Output 68W
Current Draw.  0.97A No Load     5.0A Type Load.

thank you


                    Duplicate post on 'Working Boats' removed

                                      **    Moderator  **




 

 

[gregk9]

What size props are they going to handle?

I will add that MFA motors are quite "torquey", they do run away with the amperage if you are not careful, so depending on battery capacity, you may get short run times compared with a lower current drawing motor.

[daveorgan]

im using 3 blade 40mm props and 12 v battery

thank you

[HUNTER]

I have built the boat and the motors sound ok to use, just remember that the hull is like a bath tub and has plenty of space for several batteries so time on the water is not an issue. Go for it.
Regards
Graham

[daveorgan]

THANKS GRAHAM
I WILL BE USING 2 X 12V 10  AMP BATTERIES MATE

[john s 2]

Just out of interest,i sail a Solent.Its powered by two MMM t 12 12v motors.I find that these motors are good but in my opinion overrated.Run time on two 12v 7amp hr batteries is about an hour.Im limited by  prop to hull clearance as to prop size.Using the origanal twin rudder system she doesnt turn too well.A p 94 from Action (twin esc and mixer) helped. She will now slowly turn in her own length.John.   

[daveorgan]

cheers john i know the prob with prop i got two 40mm 3 blade wondering about fitting mfa torpedo 800 or i been told to run mfa 919d 2.5:1 geared motors i still dont know what to use basically i have got two mfa marlin  high torque motors apparently  there the same as torpedo 800 have you any idea what i should fit??

there is a solent on you tube running two 800 torpedo on 12 v but it looks far to  fast ]

regards

[thelegos]

I run two geared Decaperm 6v through a P94 which is a bit on the slow side but good for 2 hours (by which time I've dozed off and fallen in) As I understand it the full size boat would have a top speed of around 11 knots, it wasn't a fast boat.
2 x 800's is quite a bit but you don't have to use it and it's good to have the power in rough conditions which I know mine would not be able to handle comfortably.

Mine doesn't turn too well either but there is a mod shown to me which reflects the original rudders, I'll try and find it and post the pictures.

This is my Aerokits Solent.
 

[thelegos]

Found some interesting pictures, these are from a real boat kindly sent to me by a member of the Model Fireboat Website but I'm sure he won't mind me sharing them.
You can see the rudder has horizontal flanges to the top and bottom edges, he's carried out this modification and it does improve the turning circle considerably.

Roger

[gregk9]

the Mersey Class run a similar item on their rudders too, as you can see from these pics which were kindly sent to me from another forum member.

[daveorgan]

thanks ever so much greg your help is appreciated
thanks for the pictures mate


dave

[furball]

As I understand it the full size boat would have a top speed of around 11 knots, it wasn't a fast boat.

More like 8-9 knots.


Is that the 'Royal British Legion Jubilee'?

Lance

[daveorgan]

all i know is its the douglas currie mored in portishead marina bristol

regards

[thelegos]

Aerokits Douglas Currie in my workroom 

[daveorgan]

ahhh very very nice

thank you

[john s 2]

Dave its hard to answer your question.The Mfa motor is ok but better motors are avalible.? Personally i find Actions 700 0r 900 motors fine.But as said there are many others.You may find your geared motors to low reving.I run four blade props. Before the mmm motors i ran Bueler 700s Not much diffrent.John.

[Number 6]

Aerokits Douglas Currie in my workroom 

Very nice! 

[daveorgan]

love mine to look that good fingers crossed