Originally posted by keilau
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Originally posted by sclui56 View Post
Which tank do you intend to use these Tami 380's on? Are you concerned about insufficient torque on larger modern tanks?
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Originally posted by sclui56 View Post
Which tank do you intend to use these Tami 380's on? Are you concerned about insufficient torque on larger modern tanks?
For the M26 Pershing, I am looking for a high quality 380 with inside cooling fan that runs at 16000 to 18000 rpm.
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Originally posted by keilau View PostI have only one large, heavy tank, German Leopard 2A6, Pro version. I am settled with the Heng Xin gearbox with the MxFans 390 motor. At 26000 rpm (8V Li-Io), the scale speed and drive character are both ideal. But the 390 is a little too fast for the WW2 era medium tank which is 100% a personal taste.
For the M26 Pershing, I am looking for a high quality 380 with inside cooling fan that runs at 16000 to 18000 rpm.
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Originally posted by HardRock View Post
The Heng Xin gearbox will not benefit from a break-in run. However, in both of the Heng Xin gearbox I received, the lithium gease was NOT spread evenly on the gears. It was just a big scope on the case wall and the gears were mostly dry. I used a craft stick to scope up the gease and reapply them evenly on the gears. If you were not mechanically inclined, I will highly recommend that you get a technician friend to do it for you.
Since the gears and their ball bearings are all loose, be extremely careful when you open the case. The 2 case half are held together by 3 machine screws. It may be a little tricky to put them back together. Hold one of the case half horizontal with inside up. Put all gears and bearings in place. Carefully lower the other half of case onto it until all bearings are in place. The case slaps close and then tighten the screws.
I still like the gearbox a lot, but would have expect better workmanship for a $80 gearbox for RC.
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Originally posted by sclui56 View Post
While waiting for Toucan to ship me a replacement red motor from China (they ran out US stock at the time), I went ahead and ordered a pair of reds from MotionRC. Order was placed on Monday, these were shipped out from IL and I got them in the Abrams on Saturday, they seem to run just fine by eyeballing. Under $25 shipped, comparable to fleabay.- room temperature
- warm to your figure tip
- hot to your figure tip?
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Originally posted by keilau View PostIf you run the tank full speed for 10 minutes, does the motor case feel- room temperature
- warm to your figure tip
- hot to your figure tip?
Did you order the Tamiya 7435122? That is the one Rubicon mentioned, and that should be suitable for the smaller WW2 tanks, do you know if the suppression capacitors are fitted from Tami?
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Originally posted by sclui56 View PostDid you order the Tamiya 7435122? That is the one Rubicon mentioned, and that should be suitable for the smaller WW2 tanks, do you know if the suppression capacitors are fitted from Tami?
I also got a pair of this:
Rc Motor 27T Brushed 380 Type 380-S / Tamiya USA
I will see. But, alas, no 7435122!!
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I found some old post at tamiyaclub.com saying that Tamiya uses only one 380 motor from Mabuchi. The only difference is the gear. Hope that it is still true.
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Originally posted by keilau View PostThe 7435122 is out of stock at Tamiya. I got this instead. It does say RC, but also GP. Since Tamiya does not spec their motor, I am concerned that it could be too slow or too fast for the HL tank. I will find out when I receive the motors.
I also got a pair of this:
Rc Motor 27T Brushed 380 Type 380-S / Tamiya USA
I will see. But, alas, no 7435122!!
The grasshopper motor arrived yesterday. It has the same "Standard Motor_RP-380/ST-4440" as in the picture of the Sheridan gearbox in Post #80.
The gear is bigger than the Heng Long one. No big deal? Well, there is a minor problem that I cannot use a gear puller to push the drive shaft out of the gear. The gear is closed ended. I have to build a little gadget to push the motor case out of the gear. The test is the most rewarding part. The motor rpm is 16,000 when cold and 18,000 after warm up, or exactly the range I am looking for. The case temperature stabilized at 26°F above ambient after 10 minutes. It is only 3°F warmer than the Mabuchi RS-380PH-3270, but 30% faster. A perfect upgrade for the Heng Long OEM grey 380 (14 degrees cooler). It is not the Tamiya 7435122, but I am convinced that it is the same custom built Mabuchi motor and the quality is high.
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You are correct about the Sheridan motor. I met up with a friend who happened to have a pair of unused 380 from his Sheridan, I took a look and they are stamped Standard Motor, RP380-ST/4440.
He said I could have them, I may do that and put them in my Taigen PZ4 (which came w/ 390's from IMEX).
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Originally posted by sclui56 View PostYou are correct about the Sheridan motor. I met up with a friend who happened to have a pair of unused 380 from his Sheridan, I took a look and they are stamped Standard Motor, RP380-ST/4440.
He said I could have them, I may do that and put them in my Taigen PZ4 (which came w/ 390's from IMEX).
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Originally posted by keilau View Post
Taigen 390 runs at 25000 rpm which is an excellent motor for the bigger and faster modern tanks. For the smaller 25 tons Panzer IV, the Tamiya 380 is a much better match. The PZ4 has a sustained speed of 10 mph and max at 25 mph. The 380 will have more realistic scale speed, even still way too fast.
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Originally posted by keilau View PostThe Heng Xin gearbox will not benefit from a break-in run. However, in both of the Heng Xin gearbox I received, the lithium grease was NOT spread evenly on the gears. It was just a big scope on the case wall and the gears were mostly dry. I used a craft stick to scope up the grease and reapply them evenly on the gears. If you were not mechanically inclined, I will highly recommend that you get a technician friend to do it for you.
Since the grears and their ball bearings are all loose, be extremely careful when you open the case. The 2 case half are held together by 3 machine screws. It may be a little tricky to put them back together. Hold one of the case half horizontal with inside up. Put all gears and bearings in place. Carefully lower the other half of case onto it until all bearings are in place. The case slaps close and then tighten the screws.
I still like the gearbox a lot, but would have expect better workmanship for a $80 gearbox for RC.
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Originally posted by sclui56 View Post
I think I will take him up on his offer but I most likely won't change the 390's out until I need to service something on the PZ4, she is running well with the mixes through the transmitter ATM.
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Originally posted by keilau View Post
The Taigen 390 should have much better quality control than the HL red. The 390, if working, is a much better motor. With the throttle control on your transmitter, you get the better of both world.
Thanks for sharing all the info with your trials.
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