Model Boat Mayhem

Technical, Techniques, Hints, and Tips => DC Motors (Brushed) and Speed Controllers => Topic started by: balders on April 03, 2011, 10:56:27 pm

Title: 380 MOTORS
Post by: balders on April 03, 2011, 10:56:27 pm: Hi,
Does anyone know where there may be any new 380 3 pole motors for sale please.A mate is after a couple.They are apparently listed in the new S.H.G catalogue but became unavailable to them after the proof went to print.

Thanks,
Andy (Balders) :-))
Title: Re: 380 MOTORS
Post by: DickyD on April 03, 2011, 11:26:28 pm: Cornwall Model Boats.

http://www.cornwallmodelboats.co.uk/acatalog/mfa-re380.html
Title: Re: 380 MOTORS
Post by: essex2visuvesi on April 04, 2011, 07:20:42 am: I have a couple of new unused ones from Tamiya RC Kits if they are any use?
Im back in the UK at the weekend so can bring them with me and post them if you want
Title: Re: 380 MOTORS
Post by: balders on April 04, 2011, 09:49:01 am: Hi,
Thanks for reply.He is interested in your motors but is not familiar with.Do you know what they rev at.He needs motors that rev at least 25000 rpm.If these fit the bill then please send your price including p and p.
Thanks for your swift reply,
Andy.
Title: Re: 380 MOTORS
Post by: DickyD on April 04, 2011, 10:10:59 am: Operating Voltage 3 to 7.2 volts.
Current approx. 6.0A at max efficiency.
RPM at 7.2v - 19000 at max efficiency.
Title: Re: 380 MOTORS
Post by: essex2visuvesi on April 04, 2011, 10:13:01 am: I guess they will be no good then :(
Title: Re: 380 MOTORS
Post by: john s 2 on April 04, 2011, 01:19:18 pm: Sounds as if better going for brushless if 25000 or more rpm required. John.
Title: Re: 380 MOTORS
Post by: longshanks on April 04, 2011, 10:17:11 pm: As DickyD suggested check out http://www.cornwallmodelboats.co.uk/acatalog/electric_motors.html

They have a wide range of motors with the full specs.
Title: Re: 380 MOTORS
Post by: balders on April 05, 2011, 08:26:41 pm: Thanks everyone for replies and suggestions.I have tried Cornwall model boats and several others but they are all having difficulty as I believe they may have been deleted.The motors are to go in a mates submarine.
Title: Re: 380 MOTORS
Post by: 6705russell on April 05, 2011, 08:47:23 pm: And he wants ones that will rev to 25000 rpm?

Russ
Title: Re: 380 MOTORS
Post by: DickyD on April 05, 2011, 09:39:38 pm: Graupner Speed 480 BB Race 7.2V (6327)

Small, high-performance ballraced motor with external brushes and 3.17mm dia shaft.

Nominal voltage 7.2 V, Operating voltage range 4.8-8.4V
No-load rpm 27000, Current drain at max. efficiency 8.5A
Shaft diameter 3.17mm, Weight 105g
Part No: G6327

http://www.cornwallmodelboats.co.uk/acatalog/graupner-6327.html
Title: Re: 380 MOTORS
Post by: andrewh on April 06, 2011, 12:58:20 pm: balders

380 once meant (only) that the armature was 38mm long, and by default had 3 poles.
Speed 400s are exactly that, despite the number, and can be had in so many winds its unbelievable
They will rev to 25k, but only if not loaded too much.
I use a S400-6V at 12V in a ducted fan, and while this is pretty brutal it survives (so far)

as suggested by DD the speed 480s (even larger selection of winds, etc) would be a step up in power

Why on earth 25K revs/min in a Sub? :o
andrew
Title: Re: 380 MOTORS
Post by: essex2visuvesi on April 06, 2011, 01:26:06 pm: Maybe its a torpedo :}
Title: Re: 380 MOTORS
Post by: Shipmate60 on April 06, 2011, 10:23:47 pm: Several here: CLICK HERE (http://cgi.ebay.co.uk/2-RS-380-Motor-car-boat-frog-monster-tamiya-model-/230604513897?pt=UK_ToysGames_RadioControlled_JN&hash=item35b119a269#ht_500wt_1156)

Bob
Title: Re: 380 MOTORS
Post by: essex2visuvesi on May 02, 2011, 07:07:15 am: Quote from: andrewh on April 06, 2011, 12:58:20 pm
balders
I use a S400-6V at 12V in a ducted fan, and while this is pretty brutal it survives (so far)

would you think a 7.2v Speed 400 would survive on 3 cell lipos in a robbe Katja? I would be water cooling it