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Old 02-07-2012, 07:39 PM   #1
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Questions?? Nitro Sedan Covert to Brushless Build Thread

Here's what i have done so far:

*picture

Pulled the engine, gas tank, throttle/brake servo, and flipped the top bracket over to the opposite side. I moved the top plate over so I could mount the motor down on an area that didn't already have holes drilled everywhere.

I'm looking to fabricate or buy a motor mount. I'm getting the angled aluminum for free, but I don't know if my dad's old drill press still works. If i could find a nice motor mount for less than $30, i'd go that route. The mount needs to allow for mesh adjustment so i'd have one static screw hole and the other will be curved. the opening for the shaft bearing will need to be oblong.

Scrap aluminum:
*picture

I can order replacement spur gears but only a 42T.
*picture

I don't know what motor/esc I should get, but im not limited to a 540 size, i have the space for a larger motor diameter. I've been trying to look it up but it's hard since i'm working with a 42T spur. i'm finding alot of nitro stuff and the Backdraft 8E but thats a 20lb 1/8 scale buggy so that motor wont be too great on this 1/10 touring sedan.

AS far as the ESC, HobbyKing has a HK-60A ESC for $25. It's OOS so might as well move up to the $40 HK-1-8-80A sensored ESC.


A TP540-11.5T 3350kv Brushless R/C Car Motor w/sensor is only $25 but i don't think that will get me to the speed i want. I'm looking to reach about 50MPH.

Will a HK-1-8-80A ESC and a XK3650-10500KV Sensored Brushless Inrunner get me goin about 50MPH on this 42T spur? Those are $40 a piece so i'd be looking at $80 for the set.

80A sensored 10500KV turnigy
hobbyking.com/hobbyking/store/__17736__XK3650_10500KV_Sensored_Brushless_Inrunne r.html

80A Sensored ESC hobbyKing
hobbyking.com/hobbyking/store/__17234__Hobby_King_80A_Sensored_Sensorless_Car_ES C_1_8_1_5_.html


I'll upload those pictures when i get enough posts. let me know what you think about all this.
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Old 02-08-2012, 04:14 PM   #2
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Hmm... Wonder if the spur gear on a 1/8 size motor would fit better than a 1/10.
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Old 02-10-2012, 04:39 PM   #3
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Default Patience has been lost

I bought the HK-1-8-120A and the XK3650-10500KV. The ESC is sensored,

ESC:
hobbyking.com/hobbyking/store/catalog/17235.jpg

HobbyKing 120A Sensored/Sensorless Car ESC (1:8/1:5) with built in cooling fan.

Features:
Enhanced throttle response, excellent acceleration, enhanced braking and throttle linearity
Programmable with a HKSS programming card.
Automatically detects the number of cells within the battery pack.
Multiple protection features, Low voltage cut-off protection, over-heat protection, throttle signal loss protection and motor jammed protection
Compatible with Hobbking, NOVAK, LRP and ORION Sensored brushless motor

Specification:
Cont./Burst Current: 120A/760A
Resistance: 0.0003 ohm
Suitable Car: 1/5 on-road and 1/8 off-road cars / trucks
Suitable Brushless Motor: 7T On road / Off road
Battery: 5-10 cells Ni-xx (NiMH / NiCd) 2-4 cells Li-Po
BEC Output: 6V/3A of switch mode built-in BEC
Motor Type: Sensorless and Sensored brushless motor
Dimension: 55x60x40mm
Weight: 150g

MOTOR:
hobbyking.com/hobbyking/store/catalog/17736.jpg

XK3650-10500KV Sensored Brushless Inrunner

Specs.
Max Amps: 80A
Max Volt: 7.4V
Rpm/V: 10500kv
Resistance: 0.0034 ohms
No-load Current: 9.5A(7.4V)
Dimension: 35.8mm x 52.5mm
Mounting hole depth: 4mm
Length of extend Shaft: 15mm
Shaft diameter: 3.175mm
Weight: 160g

Kv (rpm/v)..............10500
Weight (g)..............160
Max Current (A).......80
Resistance (mh).......3
Max Voltage (V).......7
Power(W)...............595
Shaft A (mm)...........3.175
Length B (mm).........53
Diameter C (mm)......36
Can Length D (mm)...44
Total Length E (mm)..67
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Old 02-10-2012, 07:15 PM   #4
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similar cars have been done for offroad by the manufacturers such as the Losi electric ssc short course truck w/aluminum plate chassis. The increase weigjt is forcing others to increase weight so not to be push around by heavier car. If succussful this could also be a nice force against all the current weight weenies on on road and force them to add weight.

One thing. if you have a heavy car, you should run a torger motor with low kvs. but I like to idea and hope you get it running.
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Old 02-10-2012, 08:43 PM   #5
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Quote:
Originally Posted by FNG RIDER View Post
similar cars have been done for offroad by the manufacturers such as the Losi electric ssc short course truck w/aluminum plate chassis. The increase weigjt is forcing others to increase weight so not to be push around by heavier car. If succussful this could also be a nice force against all the current weight weenies on on road and force them to add weight.

One thing. if you have a heavy car, you should run a torger motor with low kvs. but I like to idea and hope you get it running.
I'm sure I will. I just bought the mount and the motor and esc are already on their way here. I need to learn about programming now. Do i need a programming card? are they universal, liek if my LHS has one open, would it work on this?

I suppose if this car is too heavy for this motor, i could cut a chassis out of plastic. With the upper bracket, it should be sturdy enough. I want this thing to launch like mad and have top speed as well.

Now is the hard part... WAITING FOR THE PARTS
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Old 02-14-2012, 07:15 PM   #6
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Default gettin it 1 part at a time

I got my motor mount in. Now i'm just waiting for the motor and ESC.
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