What's your top speed?
- Thread starter yopappamon
- Start date
John in CR
100 TW
D-Man said:
I hope to be able to do that with one of my current builds. No load should be well over 100mph. I'm shooting for a leisurely cadence at 50mph.
FWIW, anyone chasing higher speeds on their ebikes should seriously consider using a longer wheelbase than normal upright pedal bikes. You don't see motorcycles with such short wheelbases for good reason. Low and long is the phrase of the day.
dequinox
10 kW
On a fresh SLA charge I see 33 mph...probably could get up to 37 pedaling with. I haven't done much pedaling since the upgrade to 36v...mostly joyriding and seeing what my motor can do. This is with a "24v" currie motor that's rated at 34 amps. It gets hot if I hot rod it a lot...in fact I have to be careful. I've seem amperage spikes on acceleration of up to 140A! 
dogman dan
1 PW
Re try it on skinny tires,, I was once run off the pavement by a truck full of cowboys while going 50 mph down a big hill in Santa Fe. On a 70's 10 speed, that was fun. I managed to keep from crashing, but the high speed wobble when I hit the gravel was amazing!
jonescg
100 MW
So then I ask this -
If one of the guys in the Tour De France was allowed to cheat and install any 200-5000 W hub/RC motor and as many batteries as practical (and I mean PRACTICAL - not much more than 10 kg say) and was allowed to compete with the other guys on a typical long hilly section...
Would he win?
Would he get tired of lugging those dead batteries for the last 25 km and lose?
Would he be quicker without the electro-crap and just let the ampheta...err...powerbars power him home?
Cause this has always been my adversity to e-biking. Don't get me wrong they're a fricking blast; but they are heavy and I wonder if I'd be better off on my own in terms of endurance.
Discuss.
If one of the guys in the Tour De France was allowed to cheat and install any 200-5000 W hub/RC motor and as many batteries as practical (and I mean PRACTICAL - not much more than 10 kg say) and was allowed to compete with the other guys on a typical long hilly section...
Would he win?
Would he get tired of lugging those dead batteries for the last 25 km and lose?
Would he be quicker without the electro-crap and just let the ampheta...err...powerbars power him home?
Cause this has always been my adversity to e-biking. Don't get me wrong they're a fricking blast; but they are heavy and I wonder if I'd be better off on my own in terms of endurance.
Discuss.
full-throttle
1 MW
I can almost visualise that! Back in my teens, while descending to Maracas Bay, Trinidad WI got my first 75kph overtaking a few cars. I mean - the roads there are crazy, cars simply can't take the corners as fast as bikes. Well, except for this truck full of drunk military people. It was gaining on me on the straights. It was exciting and terrifying at the same time. I barely got away and I don't think I'd be writing this if I didn't.dogman said:
Don't know. Would lean towards a win - he'd be able to descend as fast as everyone else and on the flats air resistance is the biggest evil, not weight. Guess it would come down to energy density difference the two systems.jonescg said:
John in CR
100 TW
jonescg said:
Of course he would win. The bike would be set up in such a way that he always had motor assist using an advanced variable proportion pedal assist, and use the highest energy dense batteries available built right into the frame for negligible effect on aero. 10kg of battery can be over 1.6kwh of capacity. The average stage is just over 4 hours, so something like 400 watts of average continuous assistance is easy. Give me a few months to get in shape and lose a bunch of weight, and I could easily win the Tour de France with electric assist. To get into the plus margin, all it would take is sufficient energy for the battery and motor to pull its own weight up the mountains and overcome the small increase in overall friction.
61mph. Up 6mph from my previous high after inflating the tires, getting aero with some wind assistance. Before someone chimes in about how dangerous it is - I know. I took all safety precautions by going on an isolated road, wearing motorcycle gear and surveying the stretch of road multiples times for bumps, rocks and other debris. I just have to say these R/C outrunners are simply amazing. Pound-for-pound these little motors are just amazing.
Bad news is my cheapo freewheel is officially toast. =/
Bad news is my cheapo freewheel is officially toast. =/
Kingfish
100 MW
With P0, I hit 35mph/56kmh pretty consistently on the downslope, though I noticed after one ride very recently I managed to squeak out 36mph. Wind is an issue. P1 will have a ZZ Fairing. Been looking at these:
http://www.zzipper.com/Products/prod_upright.php
http://www.zzipper.com/Products/prod_upright.php
grindz145
1 MW
32Mph flat ground at 60V, without 120% controller firmware enabled. I can't wait to reprogram!
wasp
10 kW
- Joined
- Apr 3, 2008
- Messages
- 679
wasp said:
UPDATE
tonight i ran at 83.1v off the charger 20s2p @ 50amps= 73.0 kph...ya baby
hub was heating up a little ran 7.7 km at wot ending volts 77.1
don't have any other stats as turnigy meter was disconnected
i would guess i was running 4000+ watts...6+hp
i will soon move to 25s1p and expect mid to high 80's
throttle was in 120% mode
Kingfish
100 MW
Update:Kingfish said:
Since my road trip to California I have left my P0 commuter ebike configured as 15s/55v. The bike is so much faster now without all that load – and I have been screaming up and down hills and on flats. I think it was Monday some guy saw me ripping down the road WOT when I was fresh and HOT off the charger and he told me to slow down and get a wife!
(yeah that's all we need is a brood of crazy lil' kingfishes ripping around causing havoc; trust me ~ I'm doing the world a favor by not breeding)When commuting I am a bit lazy resetting the CA: Curious, yesterday and checked the CA and MaxS reported 49.1 mph! Since then I’ve been trying to figure out how I did that; I know my hills pretty well so the hunt is on. Looks like I need to prepare for the 50mph Club: Just prior to the road trip I had the bike setup as 20s/74V and was able to hit 45 mph without a fuss on the flats and still had room to spare… need to find a road where I can get away with it 8)
~KF
Floont
1 kW
43MPH consistently on flat road, no wind, no pedaling.
47MPH down a small hill.
47MPH down a small hill.
John in CR
100 TW
Floont said:
Floont,
Those are strong numbers hauling lead on an old Huffy. Think longer wheelbase and disc brakes as you go up in performance. Do you ride WOT, or cruise at a slower speed. If WOT I envy the good roads you must have.
biohazardman
100 kW
Up in the 34-35MPH range, on level ground, no wind, 52V of a123, on the Giant 600 BMC bike. It climbs the hills very well now so not likely I will give it more juice permanently. Might just juice it up a bit to hit 40+ on level ground someday but already at 37-41 down some of the hills around town the 41 was clocked by one of those Police Radar signs with the big light bulb text. I usually run at 48V though as three of my four packs are that voltage and top speed there is about 29-30MPH.
Edit who wrote this? ;^) Voltage is our friend.
I upgraded to 60V as they all fit in the bag, it's more efficient and I get more miles out of the pack so over 35. I don't need to go that fast and have not tested for full speed yet. But, it's on the "to do" list when I am feeling a bit better.
I upgraded to 66V as I could not find a decent charger for the 60V pack. So it can do 40+ now more if I want to up the voltage again but I don't feel the need as I normally travel near the legal 20MPH limit both to be legal and get the most miles out of the batteries.
Giant Trance3 BMC 600 V2S with upgraded phase wires and a123 M1 batts. Controller used with all voltages is an Infineon 12 Fet 72V 40A by Lyen
48V 29-30MPH
52V 34-35
60V 37-38
66V 39-40
Edit who wrote this? ;^) Voltage is our friend.
I upgraded to 60V as they all fit in the bag, it's more efficient and I get more miles out of the pack so over 35. I don't need to go that fast and have not tested for full speed yet. But, it's on the "to do" list when I am feeling a bit better.
I upgraded to 66V as I could not find a decent charger for the 60V pack. So it can do 40+ now more if I want to up the voltage again but I don't feel the need as I normally travel near the legal 20MPH limit both to be legal and get the most miles out of the batteries.
Giant Trance3 BMC 600 V2S with upgraded phase wires and a123 M1 batts. Controller used with all voltages is an Infineon 12 Fet 72V 40A by Lyen
48V 29-30MPH
52V 34-35
60V 37-38
66V 39-40
minde28383
10 kW
- Joined
- Apr 2, 2010
- Messages
- 702
9c 2806,
ping 15Ah 48v lipo v2.5
Stock controller
26" wheels
My weight: 81kg
I can reach 40km/h very easily on flat, no pedaling.
I can get to 45km/h on flat but need to give it more time till it reaches 45km/h.
Downhill I did some 52km/h but it didn’t feel right. It was my third ride. Also my battery was on rear rack, weight-battery is quite high, probably there would be more stability if battery was somewhere in frame’s triangle.
Max current 26Amps
Lowest voltage 49v
After 30km/h I can't catch up with the hub. Some lower gears need to be fixed.
ping 15Ah 48v lipo v2.5
Stock controller
26" wheels
My weight: 81kg
I can reach 40km/h very easily on flat, no pedaling.
I can get to 45km/h on flat but need to give it more time till it reaches 45km/h.
Downhill I did some 52km/h but it didn’t feel right. It was my third ride. Also my battery was on rear rack, weight-battery is quite high, probably there would be more stability if battery was somewhere in frame’s triangle.
Max current 26Amps
Lowest voltage 49v
After 30km/h I can't catch up with the hub. Some lower gears need to be fixed.
Floont
1 kW
John in CR said:
Fortunately, I weigh 150 pounds, so my weight and the SLA's are not as heavy as most men and their e-bikes. Also, I live in rural west central Florida in rolling hills that are well paved. I have hit a potholes at top speed WOT, thus my bent rear wheel. I change out the pads on my caliper brakes often. The rubber melts too easily.
EDIT: I neglected to state that all my SLA's are supported on the hub axles, not by the frame at all. The frame only has to support my weight and its own.
oatnet
1 MW
64mph on my Vectrix (bouncing past the 62mph/100kmh governor; probably 70mph when I get the 110kph software upgrade installed. Note this a 150v FROCK not a chainsaw
44.7mph on my xtracycle with a kelly driving a 5304 at 90a from 88.8v/15ah LiFe. I ran these speeds on my daily commute for a year or so, until I cracked ribs in a low-speed accident on a different bike, and thought about how much worse it would be at 40+mph.
I get more speed and torque jollies out of the Vectrix than I have skills to build into an ebike. That leaves my builds focusing on balance, stealth, range, and low-maintenance, instead of speed. If I go a year or two without laying out the maxi-scooter, I'll graduate to whatever Brammo's current offering is.
-JD
44.7mph on my xtracycle with a kelly driving a 5304 at 90a from 88.8v/15ah LiFe. I ran these speeds on my daily commute for a year or so, until I cracked ribs in a low-speed accident on a different bike, and thought about how much worse it would be at 40+mph.
I get more speed and torque jollies out of the Vectrix than I have skills to build into an ebike. That leaves my builds focusing on balance, stealth, range, and low-maintenance, instead of speed. If I go a year or two without laying out the maxi-scooter, I'll graduate to whatever Brammo's current offering is.
-JD
Floont
1 kW
Hmmm... At 88.8V, a 5304 should be getting significantly higher speeds than my 5304 at 72V, although my highest speeds are on a fresh charge and the batteries are really at 78.2V (plus my tires are over-pressured to reduce rolling resistance). Today, I hit 42MPH on a flat road, no wind. The 42MPH is verified by GPS.oatnet said:
I wonder what is limiting your top speed?
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