Miles' Project 1 [eMoulton]

[Miles]

Actually my torque is higher than that. My secondary pulley is 48 tooth.

It seems I can't count up to 48 without losing track

[recumpence]

Hmm, 1,2,3,4,5,6,7,8,9,10,11,12,13,14,17,19,24,88

Wow, I lose track at 14!

Matt

[Miles]

Just received my new battery packs - still waiting for the charger....

[recumpence]

No fair, you bought "Racing" packs. Oh, man, now you are going to blow us all away.

Matt

[Miles]

Only if I was to run this motor at 5000 rpm

[recumpence]

OK, now we are talking.

Hmm, that belt will handle over 10,000 RPM...............

Matt

[Miles]

But the maximum speed rating for the motor is 4000 rpm

[recumpence]

But the maximum speed rating for the motor is 4000 rpm

That never stopped me!

Matt

[Miles]

.
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Just received my charger and power supply from AstroFlight
.
.

[recumpence]

Hmm, looks familiar.

I have that charger and power supply. I use a Hyperion charger for my 12S lipo packs, though.

Man, you and I have too much in common.

Matt

[recumpence]

Updates?

Man, I am dying to here how this thing runs!

Matt

[Miles]

Matt,

Had a brief test yesterday.

The new batteries are a huge improvement - much less voltage sag. Unfortunately, I had a bad puncture after 5 mins of fun So, nothing much in the way of data, yet. I'll add the eLogger for the next run. Still conditioning the batteries, though.

[recumpence]

How does it pull? How fast did it go?

Matt

[Miles]

It's designed for hill climbing, top speed is 22mph at this voltage (39V). It pulled up a long 20% gradient with ease. Consumption 12 Wh/mile, so far. Will get some proper data later in the week.

Have you rigged up the eLogger to yours yet, Matt?

[MitchJi]

Hi Miles

Wow that was so worth the wait!! has Randy seen it? hmm very nice indeed, how does it perform? what kind of top speed have you seen, I am guessing its a little less than Randys bike due to the wheel size, I bet its pretty quiet as well? love to see some video of it as well.

Thanks for posting the pictures they are superb and I think detail about the cleanest build on an upright bike that I have seen to date, it looks like an off the shelf bike.
Knoxie

Hi,

I disagree!

It looks much better than almost any off the shelf bike.

It looks much better than every off the shelf Ebike I've seen.

Nice work!

[recumpence]

It's designed for hill climbing, top speed is 22mph at this voltage (39V). It pulled up a long 20% gradient with ease. Consumption 12 Wh/mile, so far. Will get some proper data later in the week.

Have you rigged up the eLogger to yours yet, Matt?

Yes. It works fantastic!

Wow, 12wh per mile............ amazing! My best was 15.69 (if I really nursed it) without any pedalling. I average about 20wh per mile. However, mine is geared for 40mph and has HUGE horsepower.

Still, 12wh per mile is incredible.

Matt

[jmygann]

Was the 12wh/mile without pedaling ?

[Miles]

With minimal pedalling. I'll do some more rigorous testing later in the week.

[knoxie]

Hi Miles

Still loving your work, I am disappointed that Draper still wont recognise what a good job you have made of the bike though, I dont post on PA but did see him still saying that he thought his bike was better and more efficient etc etc, that annoys the heck out of me, how can he think his heavy and inefficient upright cheapo bike is better than your bike is beyond me? he was claiming his chain reduction is more efficient than the belt? he didnt count on the fact that your bike has 1/4 of the weight and the rolling resistance of his bike?

Ah well, anyone with eyes will know your bike is prob the best looking and cleanest most elegant build that we have all seen to date, Randys concept is a good one its just a shame that he cant acknowledge someone has taken it to the next level, i would take belt drive over chain drive any day, I know this from experience of playing with chain and belts on the Lemco bike.

Would love to see and hear your bike in action Miles if you can make that happen? I think one of those coconuts may have fell and hit Randolph on the head

Cheers

Knoxie

[recumpence]

I won't even say what a really think about Randy. He is the reason I stopped posting on the PA forum.

I cannot believe the crap he gave me on my bike. He actually posted this regarding my bike------- "You may as well just stick a drum sander in a drill and run it against the front tire for the efficiency you will get with your setup........"

He is a worthless...............

Well, anyway, he is stuck in a state that has banned E-bikes. Serves him right.

Miles bike is the most elegent setup I have seen. From my perspective, I do not think it is possible to achieve better efficiency than he has right now with existing technology (without some radical custom stuff).

The best efficiency I have seen is 15wh per mile without any hills (no pedalling) at 20mph or the same 15wh per mile with gentle pedalling but using the motor up hills. Typically more like 20wh per mile just cruising, not paying attention to efficiency.

12wh per mile is absolutely phenominal.

I am very excited to see and hear his bike.

We need some video!

Matt

[Miles]

Hi knoxie,

You're too kind...

Randy's reaction was pretty much what I expected... Actually, I'd like to do some tests to compare the efficiencies of belts and chains at the torque levels/speeds that we are using them. It would be good to have some figures.

Speaking of your LEMCO bike, I was looking at the pic of its gearbox today:



That was a beautiful bit of engineering

I'm planning to do a video of the Moulton, so you'll be able to see it in action - but you won't hear it...

We should really make a date for all of us to meet up, while the weather's still fine.

[recumpence]

I wish I was near you. I would love to see your bike in person.

I love the Lemco drive system too. Very slick.

Matt

[Miles]

Just been out for an evening ride:

Over mixed terrain, for speeds under 18mph (with no pedalling at all), I was getting 15.7 Wh per mile.

38.4V 4.6 Ah NiMH pack gave 4.3 Ah (2nd discharge).

More data over the weekend.

[recumpence]

How much heat was in the motor?

Matt

[Miles]

It didn't really heat up much - just felt slightly warm, at the end of the run. It weighs 5.5 pounds, is vented and has a small fan on the shaft. When I put the eLogger on, I'll add a temperature sensor.