markz
100 TW
Intro/Background and blah blah blah
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Ive only dabbled in hub motors, but lots of bikes are being put on 4 sale in the classifieds, and I found some cheap, if not free frocking ugly ones. It got me thinking because I was planning on renting a bicycle box for $12/m from Calgary Transit. But I am a cheap skate, better to get a frocking ugly bicycle that looks odd (gear reduction) having people say "What the frock is that contraption on that frocking ugly piece of shit rusted out bicycle" then locking the bike itself up on the bicycle rack for free. With the usual U-Lock and cable lock the wheels, seat. Maybe even weld them :lol:
Concept & Idea
-------------------
- I want to be able to quickly take off and connect the motor, ESC and battery. All the things I dont want stolen. The rest of the crappy bike can be left out to gain more patina
Been researching this the last hour. I can go 2 or 3 methods. Method 1 is lots of gear reductions on a 1000kv rc motor which needs a 48:1 reduction to obtain a 500rpm. Method 2 I was originally thinking to be friction drive but even a 190kv needs reduction, I know people install different rollers.
Method 1) 1000kv RC motor noisy 48:1 500rpm. I found a random one on HobbyKing called Dr. Mad Thrust, 8S(29.6Vnom @30Krpm)-10S(37Vnom @37Krpm) which is 1000kv, 4600W 90mmx40mm EDF $60usd on sale.
Here is the sprocket selections. Basically a 4x4x3 setup for $80 with everything (Chain, Hubs/Couplers).
Princess Auto (like USA's Harbor Freight) has weld-on sprockets, ranging from 10T for $4 or $5, 40T $9.50 and 30T $7.50. On the motors axle would have 10T or a 9T, then chain to 40T which is connected on the same shaft to a 10T, repeat that again, then the wheel would have 30T. 4:1 x 4:1 x 3:1 = 48:1 500rpm. Chain is $20, then either idler
or hubs
Method 2) Friction drive - Really small roller and a very low kv motor ~190kv. Use the shell of the outrunner as the roller. Reduce voltage down to 6S might work, originally I thought I needed more reduction, but that was using 10S.
Method 3) Vee Belt Sheeve Pulley on a 26" tire, gets a 10:1 reduction (outrunner 65mm to 650mm wheel) Just a variation on method 1, higher reduction. The highest I could with weld on sprockets is 7.2:1
https://hobbyking.com/en_us/kd-53-30-high-voltage-brushless-outrunner-190kv.html
This is an 1000kv EDF motor, alright to use on the 3 section gear reduction?
Speed would be 35kph/20mph
Basically its 2.2km (1.4 miles) mostly 2, 3, 4% grade with a handful of short 20 meter sections of 6-7%
330lb rider
Nice weather has come, so Im in the mood to spend.
---------------------------------------------
Ive only dabbled in hub motors, but lots of bikes are being put on 4 sale in the classifieds, and I found some cheap, if not free frocking ugly ones. It got me thinking because I was planning on renting a bicycle box for $12/m from Calgary Transit. But I am a cheap skate, better to get a frocking ugly bicycle that looks odd (gear reduction) having people say "What the frock is that contraption on that frocking ugly piece of shit rusted out bicycle" then locking the bike itself up on the bicycle rack for free. With the usual U-Lock and cable lock the wheels, seat. Maybe even weld them :lol:
Concept & Idea
-------------------
- I want to be able to quickly take off and connect the motor, ESC and battery. All the things I dont want stolen. The rest of the crappy bike can be left out to gain more patina
Been researching this the last hour. I can go 2 or 3 methods. Method 1 is lots of gear reductions on a 1000kv rc motor which needs a 48:1 reduction to obtain a 500rpm. Method 2 I was originally thinking to be friction drive but even a 190kv needs reduction, I know people install different rollers.
Method 1) 1000kv RC motor noisy 48:1 500rpm. I found a random one on HobbyKing called Dr. Mad Thrust, 8S(29.6Vnom @30Krpm)-10S(37Vnom @37Krpm) which is 1000kv, 4600W 90mmx40mm EDF $60usd on sale.
Here is the sprocket selections. Basically a 4x4x3 setup for $80 with everything (Chain, Hubs/Couplers).
Princess Auto (like USA's Harbor Freight) has weld-on sprockets, ranging from 10T for $4 or $5, 40T $9.50 and 30T $7.50. On the motors axle would have 10T or a 9T, then chain to 40T which is connected on the same shaft to a 10T, repeat that again, then the wheel would have 30T. 4:1 x 4:1 x 3:1 = 48:1 500rpm. Chain is $20, then either idler
or hubs
Method 2) Friction drive - Really small roller and a very low kv motor ~190kv. Use the shell of the outrunner as the roller. Reduce voltage down to 6S might work, originally I thought I needed more reduction, but that was using 10S.
Method 3) Vee Belt Sheeve Pulley on a 26" tire, gets a 10:1 reduction (outrunner 65mm to 650mm wheel) Just a variation on method 1, higher reduction. The highest I could with weld on sprockets is 7.2:1
https://hobbyking.com/en_us/kd-53-30-high-voltage-brushless-outrunner-190kv.html
This is an 1000kv EDF motor, alright to use on the 3 section gear reduction?
Specs:
Kv: 190 rpm/v
Max Current: 90A
Max Power: 2000W
Cell Count: 6 ~ 10S LiPoly
Weight: 670g
Dimensions: 63 x 64mm
Shaft Size: Dia 8mm/ Length 25mm
Mounting Hole Dimensions: Rear 23.4mm / Front 30.4, 44.4mm
Speed would be 35kph/20mph
Basically its 2.2km (1.4 miles) mostly 2, 3, 4% grade with a handful of short 20 meter sections of 6-7%
330lb rider
Nice weather has come, so Im in the mood to spend.