Search found 2648 matches

by speedmd
Jan 20, 2018 11:30 pm
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 96
Views: 1261

Re: Potential Catastrophic Frame Failer Averted ….sort of.

After giving it a good think, I have decided to retire the old Liahana frame. I agree, it served it's purpose and gave me many miles of dependable riding. Glad you found a good older frame at a reasonable price. Big Name brand also. Nice space for batteries. Like the added plate where your old one ...
by speedmd
Jan 19, 2018 11:33 am
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 96
Views: 1261

Re: Potential Catastrophic Frame Failer Averted ….sort of.

This entire thread reminds me why so many bike people have been also plane people (going WAY back....): Way back, before planes and bikes. Riding and flying are the same in ancient languages, and it was a tradition to give bird names to the best horses. Interesting derivation in the language. I alw...
by speedmd
Jan 18, 2018 10:34 pm
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 96
Views: 1261

Re: Potential Catastrophic Frame Failer Averted ….sort of.

I ride my circa 1150 gram (54) full carbon frame cross bike on some well worn rocky bike trails also with many of the mtn bike group in the fall. Not racing any longer, but still can stay with many of the fast guys on the climbs. Bombing the down hills, is difficult to stay with them unless it is so...
by speedmd
Jan 18, 2018 10:40 am
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 96
Views: 1261

Re: Potential Catastrophic Frame Failer Averted ….sort of.

Now that we are deep into the armchair failure analysis :lol:, I am not too sure it is a weld void or over weld type defect. To me it looks to be a classic hi weld bead angle causing stress concentration at welds edge in the tube. A bit of finishing with a hand file or grinder as done on the old sch...
by speedmd
Jan 18, 2018 12:15 am
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 96
Views: 1261

Re: Potential Catastrophic Frame Failer Averted ….sort of.

If you're re-welding aluminum that's already been welded and heat-treated, you've already lost the game. Is that frame even heat treated? May not be. Do we even know what alloy it is. Certainly a can of worms. Regardless, welding requires proper bead formation, weld prep and correct amounts of pene...
by speedmd
Jan 17, 2018 7:24 pm
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 96
Views: 1261

Re: Potential Catastrophic Frame Failer Averted ….sort of.

..... Carefully drilled 3.2mm holes and pop-rivets don't. It's why they use pop-rivets to hold aluminium planes together. Hummm......Looks like I will have to dig deep into the ole tool box and look for my pop rivet gun. :D Thanks for posting the crack photos. It lived it's life. Looks to be much t...
by speedmd
Jan 17, 2018 11:09 am
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 96
Views: 1261

Re: Potential Catastrophic Frame Failer Averted ….sort of.

Don't band aid the frame. If you want to just fix it, you want to weld it and add lots of material (fillets) to cover much further out onto the tubes. I would fold a section of aluminum sheet and add it as a gusset also that connects the top down and head tube to it also. Many years ago they learned...
by speedmd
Jan 15, 2018 10:54 pm
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 96
Views: 1261

Re: Potential Catastrophic Frame Failer Averted ….sort of.

Well, that is not catastrophic failure. It is progressive, and with frequent inspection it could probably ride safe until the springtime. Are you going to put his kids through college when he is gone? :roll: Seriously? Did you take out life insurance on him? :lol: Fix it or park it. No one should e...
by speedmd
Jan 15, 2018 1:50 pm
Forum: General Discussion
Topic: Wireless Connection from House into Garage
Replies: 7
Views: 113

Re: Wireless Connection from House into Garage

I just ordered a range extended for my wifi. Hoping it works in my dead spots.
by speedmd
Jan 09, 2018 11:28 am
Forum: E-Bike Photos & Video
Topic: Bad Boy ultra first build (almost done)
Replies: 25
Views: 10642

Re: Bad Boy ultra first build (almost done)

Thanks Volts. I also want to try out a hub motor drive if time, money and the right used bike comes along. The gng setup is much too fragile to rely on IMO. Too many failure points in the drive. It is fun to ride however.
by speedmd
Jan 09, 2018 11:23 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1388
Views: 28172

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Not 100% true. This 4x statement ignores compost gasses and many other solid form renewable's now currently being used as direct heat sources and not being wasted in lower efficiency conversion methods to make / store / transmit electric power. If heat is what your after, why waste the fuel making e...
by speedmd
Jan 01, 2018 12:05 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1388
Views: 28172

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Slightly below minus 10 F here this AM with a nice seasonal breeze. We say, if they talk wind chill, they are flat landers for certain and can not be trusted. :lol: Electric power is certainly important this time of year but a distant second to heat. We can live without electric, but not very long w...
by speedmd
Jan 01, 2018 9:57 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1388
Views: 28172

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Most of the local stuff are small commercial or private installs. They do cost a bunch more, but do work in our cold winter conditions with no snow maintenance but we get on average roughly half the snow fall of your snow belt. In your area, one would need to have more ground clearance to clear the ...
by speedmd
Dec 31, 2017 7:05 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1388
Views: 28172

Re: Wind and Solar vs Coal, Gasoline, Nuclear

The systems pictured are setup to optimum summer angles. Worst case scenario for snow IMO. Clearly need to have a steeper angle or actively store themselves vertically when snowing or have defrost systems thought out if any winter generation is expected in snowy cold northern climates. The active ar...
by speedmd
Dec 10, 2017 9:10 pm
Forum: Battery Technology
Topic: Battery Build Question
Replies: 3
Views: 300

Re: Battery Build Question

Those balance board packs do look attractive. 4 in parallel x 2 in series would make a good size pack also. I have looked at these also. Thinking you would want to setup one BMS to control the entire pack via connected parallel string of 10 cells that you would connect across the four packs and char...
by speedmd
Dec 10, 2017 8:38 pm
Forum: E-Bike General Discussion
Topic: Hub motor as smart trainer load - generator
Replies: 0
Views: 165

Hub motor as smart trainer load - generator

Playing with the idea of using a hub motor as a load (vary regen) for a modern smart trainer. Thinking even a small hub will be safe at high (1- 1.5KW) loads given the average riders power output- duration. Main concerns, are how stable the load can be made given the heat and inefficiency issues as ...
by speedmd
Dec 10, 2017 8:21 pm
Forum: E-Bike Technical
Topic: High wattage hub motor for 150mm drop out required
Replies: 13
Views: 458

Re: High wattage hub motor for 150mm drop out required

At this power level, you will need to add some sturdy torque arms and most likely like to have some additional wheelbase also. It may be a good opportunity to think this through with the motor you would most want in mind.
by speedmd
Dec 10, 2017 9:49 am
Forum: E-Bike Technical
Topic: Help setting up Sabvoton and QS-205
Replies: 10
Views: 410

Re: Help setting up Sabvoton and QS-205

I’m 99% certain it’s due to your ignition wire. If you don’t power cycle via the ignition wire, the parameters won’t save (stupid, I know). I learned this the hard way also. Makes sense in hindsight. If power is not connected to controller, how is it going to power the save on the logic side? We ne...
by speedmd
Dec 09, 2017 11:42 pm
Forum: E-Bike Technical
Topic: Help setting up Sabvoton and QS-205
Replies: 10
Views: 410

Re: Help setting up Sabvoton and QS-205

Some threads that cover some of the start up issue your discribing. https://endless-sphere.com/forums/viewtopic.php?f=4&t=62240&p=1336489#p1336489 https://endless-sphere.com/forums/viewtopic.php?f=4&t=89161&p=1339353#p1339353 You will need a 1k resistor work around (first thread) if you are not conn...
by speedmd
Dec 08, 2017 9:04 pm
Forum: E-Bike Reviews & Testing
Topic: Sabvoton MQCON review and documents
Replies: 21
Views: 2182

Re: Sabvoton MQCON review and documents

There has been some discussion on the qs motor thread on the quality- type of sensors they use making a difference on the hall test. EG used the ss41 type also as posted above with success. Will do some more testing once some time free's up and try to see if it is running close to correct. If not, I...
by speedmd
Dec 07, 2017 3:11 pm
Forum: E-Bike Reviews & Testing
Topic: Sabvoton MQCON review and documents
Replies: 21
Views: 2182

Re: Sabvoton MQCON review and documents

There is a world of difference between the greentime I tried and the 72150 that I am trying out now. Still not 100% done with my install as I twisted up and destroyed a chainwheel and its mounting nuts but I am getting ready to further test it out now that I have some good parts in hand. Not sure if...
by speedmd
Dec 03, 2017 4:52 pm
Forum: E-Bike Technical
Topic: Which spoke length calculator?
Replies: 9
Views: 197

Re: Which spoke length calculator?

Sapin is only to outside of flange and spoke head interface of the rim. Hm. Maybe I misinterpret you, but I don't think that can be right. Their "rim thickness" setting is a direct addition to the calculated length. Also, as they are calculating the longer of the two measurements ... Spoke head int...
by speedmd
Dec 03, 2017 11:08 am
Forum: E-Bike Technical
Topic: Which spoke length calculator?
Replies: 9
Views: 197

Re: Which spoke length calculator?

Sapin is only to outside of flange and spoke nipple head interface of the rim. You will want the spokes to extend into the nipple heads which the ca calculator clearly does. Careful with the sapin length if you plan on running spokes from the inside of thick flanges and can not tolerate spoke protru...
by speedmd
Dec 01, 2017 8:13 pm
Forum: E-Bike General Discussion
Topic: Cyclist spits at me and makes a buzzing noise !
Replies: 46
Views: 1910

Re: Cyclist spits at me and makes a buzzing noise !

had that 150W geared tube motor Most of the serious guys I know have on board telemetry now days, that records heart rate and power meter data. No way to fool the left crank arm power meter data without it correlating with a reduced heart rate vs trail slope-speed norms. Folks not willing to post t...
by speedmd
Dec 01, 2017 7:43 am
Forum: E-Bike General Discussion
Topic: Cyclist spits at me and makes a buzzing noise !
Replies: 46
Views: 1910

Re: Cyclist spits at me and makes a buzzing noise !

I was doing 46 km/h on a slight down hill
The back half of our local 10 mile tt which is predominately down hill, 10 minutes flat is a decent time(48.2kmh). The fast guys are circa 9 minutes (53.6kmh)! :shock: You will need to up the voltage to stay with them. :lol: