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Conference vmszoo::rc

Title:Welcome To The Radio Control Conference
Notice:dir's in 11, who's who in 4, sales in 6, auctions 19
Moderator:VMSSG::FRIEDRICHS
Created:Tue Jan 13 1987
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1706
Total number of notes:27193

47.0. "DC MOTORS" by KANE::ABRAMS () Wed Feb 11 1987 16:51

    
    I just read an article about some special motors manufactured by
    ASTRO FLIGHT which are made of samarium-cobalt.  The manufacturer
    claims a 30-35% increase in power, a 35-40% reduction in weight,
    and 10 times smaller loss due to heat.  The article states that
    Astro Flight is producing motors for planes, cars, and boats.  What
    I would like to know is if anybody has used these motors and what
    experiences that you have had with them.  I would also like to hear
    about any other motors and your experiences with them and if you
    could list the spec. for the motors would be helpful.
    
    The article I am refering to was in Design News 1-5-87 page 68
    
    				thanks
    				george
    
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47.2HOMBRE::DAUGHERTYWed Feb 18 1987 21:1426
    Well, you're not getting any first hand information so I'll pass along
    some of my observations.

    The LeMans series is the most popular brand (Kyosho) with our club.
    They are readily available, reasonably priced, and appear to perform
    well.

    In 1/12th, the 480S and 480T are heavily used. I've seen a couple of
    the Tamiya Technituned motors and a few Trinity's. I use a Tamiya
    Black motor. None of the above have a clear power advantage on tracks
    where the straights run about 120'. More important is the motor's
    "drivability", a smooth power curve, even at the sacrifice of peak
    power. I have not heard any complaints from the owners of any of these,
    nor have I seen any motor failures. I have seen a driver have a lot of
    trouble using a LeMans 360 (I don't remember which one) because of the
    "peaky" nature of the motor. On the first resistor band off of neutral
    it would spin the tires, not very subtle. 
     
    In 1/10th, the 240x and 360x are the most popular (the modified heats run
    4 minutes). The only LeMans failure I've seen was a 240S seized with a
    melted endbell, so I would suggest buying one with an aluminum endbell.
    I believe you can retrofit them. The fastest 1/10 modified (6 cell) I've
    seen was a fiberglass panned RC10 fitted with the 360G. Considering the
    cost of the Trinity's and Reedy's, the LeMans motors are a bargain.

47.3Opinion...SNOMAS::LEEWed Feb 18 1987 21:2523
    
    Hello,
    
    One thing to keep in mind, is that the Lemans 240 will only run
    about 4 minutes (240 seconds=4 minutes), so if your races run longer
    than that, or you like to drive in the yard, etc., your running
    time will be limited. Your driving style will also have a lot to
    do with running time, I have seen Lemans 360 buggies run batteries
    dead during a 4 minute race, when driven hard. If your buggy is
    4 wheel drive, Your time may be even shorter. I also know that
    the Lemans 360 is not strictly legal in the stock class because
    it has an adjustable end bell (timing). I don't know if your club
    is strict about this, or if you are planning on running in the stock
    class, but I think that the Lemans 240 may be of the same type
    case. I am very impressed with the power of the Lemans motors,
    especially the 360, but have seen many guys break gears, etc.
    when using too much power during jumps. I guess you always
    have tradeoffs.
    
    							Good Luck,
    							Lorrin
       

47.4ASD::DAUGHERTYMon Oct 26 1987 23:3533
	Losi is offering five motors:

	#6060 - Legal stock 
	#6040 - Modified, 2wd
	#6046 - Modified, 4wd
	#6054 - Modified, oval
	#6056 - Modified, undrivable

	Team Losi Revolution motors are distributed by:

	RPS Distributing
	1655 E. Mission Blvd.
	Pomona, CA 91766
	(714) 620-0164

	These motors are in Tower's 1988 catalog:
	
	Tower
	part #

	LOSC5660   #6060 motor   $20.65
	LOSC5640   #6040 motor    52.45
	LOSC5646   #6046 motor    52.45
	LOSC5654   #6054 motor    52.45
	LOSC5656   #6056 motor    52.45


	List price on the modified motors is around $70.



	Chris

47.5CHEAP MOTORSSOLKIM::BOBABob Aldea @PCOFri Sep 21 1990 18:5524
    I'm one of those who can't resist a bargain, so when I saw some surplus
    motors advertised for $3.50, I decided to try them out.  I figured I
    could always rewind them if they were unusable as delivered.  When they
    arrived (I ordered three) I noted that they are externally identical to 
    the Thrustmaster 550 in my Electricub, including the iron ring.  
    
    Preliminary tests revealed that they draw about 22 amps static on
    twelve cells with an 8x4 Tornado prop.  As it happens, that current 
    drain is a close match to my geared Astro 15, so I just bolted the 
    motor into my Amptique and went flying.  Power seems down some from 
    the 15 with its 12x8 prop, but more than adequate to haul the 
    Amptique around at 1/3 throttle.  I don't own a tach yet, so I can't
    give you a more meaningful evaluation of power output.
    
    If you want a cheap power plant for sport flying, these might be just
    the thing you're looking for.  They are available from :
    ALL ELECTRONICS CORP., 1-800-826-5432.  The catalog text follows:
    
    Mabucci#RS-550, Powerful little DC motor similar to those found in some
    remote control cars and boats.  Operates on 3.6 to 15 Vdc.  No load
    reating: 12,400 rpm @6 Vdc 0.7 amps.  At max efficiency: 11,300 rpm,
    3.87 oz/in torque.  1.46" dia. X 2.24" long.  1/8" diameter shaft with
    brass gear.  Threaded (4x40) mounting holes in front on 1" centers.
    CAT# DCM-23    $3.50 each