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Author Topic: Newbie with GRP Perkasa 37"  (Read 2689 times)

crockster

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Newbie with GRP Perkasa 37"
« on: September 25, 2011, 09:30:34 pm »
Hello to all

I'm very new to the rc side of this hobby. I've been building models for a few years but only now getting into making them move! I hope you can help!

I’m bulidng a single prop 37” GRP hull plywood deck kd perkasa from precedent. Please could anyone advise me on which brushed motor, esc, battery and prop combo i need. From trawling the forum, I’m thinking an 800 motor, 40 amp esc and twin 3800 ni cad batteries with a 40mm proip but that’s a bit of  a guess. I'd like it to plane a bit but I'm not looking to burn around, just a reasonable run time so the kids can have a good go as well!

Thanks in anticipation for all your help

Crockster
 :-)
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MikeA

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Re: Newbie with GRP Perkasa 37"
« Reply #1 on: September 25, 2011, 11:36:23 pm »
I would dare say youve nailed it on the head with those choices of hardware. Possibly change the ni cd to nimh though as they dont have the memory affect.
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DickyD

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Re: Newbie with GRP Perkasa 37"
« Reply #2 on: September 26, 2011, 08:55:57 am »
I agree with Mike but would say if you are going to change to nimh batteries to get the highest mAh ones you can get to increase running time.

http://www.component-shop.co.uk/html/large_packs.html

For batteries Component Shop, excellent service , cheap prices and cheap p&p.
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markymar93

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Re: Newbie with GRP Perkasa 37"
« Reply #3 on: October 02, 2011, 07:40:40 pm »
Hi
I had the Perkasa 46 inch (if i remember correctly) with a marlin motor.  That seem to work pretty well.  Its a nice boat and I regretted getting rid of it.

mark
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john s 2

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Re: Newbie with GRP Perkasa 37"
« Reply #4 on: October 02, 2011, 08:35:18 pm »
One of Actions 900 motors would do, along with his esc, fuse board etc.John.
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Shipmate60

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Re: Newbie with GRP Perkasa 37"
« Reply #5 on: October 02, 2011, 09:02:27 pm »
The MFA 800 motor will be too slow for her, they only rev at about 4500-5000 rpm.
The 850 would be a better choice at 9000-10000 but at a higher power consumption.
The MiNim batteries should let her get on the plane due to their weight.
You could also go for something like a Graupner 600BB Turbo on 12 ish volts at quite an increase in rpm so a smaller prop would be needed.

Bob
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crockster

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Re: Newbie with GRP Perkasa 37"
« Reply #6 on: November 02, 2011, 11:25:50 am »
 :-)) :-)) :-))

Thanks for all your help - I've gone for a 900bb motor, 50 amp esc and twin 3800 nimh batteries with a 30mm prop - so we'll see but i may need a larger prop. Its all the fun of experiments!

Dave
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