March 20, 20224 yr 1 hour ago, ckyliu said: They fit drum brakes to a lot of BEVs Well yes, but lots of lower end cars use drums on the rear. ICE or EV. My daughters Fiat 500 hybrid uses drums on the rear. After my CX5 I had a Fiesta Titanium ecotec for a couple of months, drums on the rear. Tesla use Brembo discs. Most medium to high end EV's use discs. It's the front I'm referring to where most of the braking load is. Edited March 20, 20224 yr by martin-w
March 20, 20224 yr Author 1 hour ago, ckyliu said: They fit drum brakes to a lot of BEVs for that exact reason, at least on the rear axle. I didn't know anyone still used drum brakes. When i was a young man and we worked on our own cars we would adjust the drum brakes ourselves. There was a little star wheel that you could turn to make them tighter or looser. Noel The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
March 20, 20224 yr 37 minutes ago, birdguy said: I didn't know anyone still used drum brakes. When i was a young man and we worked on our own cars we would adjust the drum brakes ourselves. There was a little star wheel that you could turn to make them tighter or looser. Noel Its the lower end models in the UK that have drum brakes. Manufacturers still use them for the cheaper models, cheaper than discs all round.
March 20, 20224 yr Clearly the brakes were getting enough use to keep the discs/rotors rust free then. In the UK (not EV with regen) both disks and pads are so soft these days they don't last five minutes. Softer so better braking efficiency they say. You pay for it though.
March 20, 20224 yr 56 minutes ago, martin-w said: Clearly the brakes were getting enough use to keep the discs/rotors rust free then. Based on some of Rob's racing videos, I'm sure the brakes on his EV received a sufficient workout. Ted [email protected] ghz, Noctua C12P CPU air cooler, Asus Z77, 2 x 4gb DDR3 Corsair 2200 mhz cl 9, EVGA 1080ti, Sony 55" 900E TV 3840 x 2160, Windows 7-64, FSX, P3dv3, P3dv4
March 20, 20224 yr Author 7 hours ago, martin-w said: How long did the brake discs last? Rotors as you call them in the US. I bet not long, due to rust I doubt rust is a problem where I live. Not much rain r snow. The RH outside right now is only 12%. The RH gets high only during rain storms which never last long and after it passes the streets dry up rapidly. The RH is so low the snow usually sublimates before it melts. Noel The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
March 20, 20224 yr 1 minute ago, birdguy said: I doubt rust is a problem where I live. Not much rain r snow. The RH outside right now is only 12%. The RH gets high only during rain storms which never last long and after it passes the streets dry up rapidly. The RH is so low the snow usually sublimates before it melts. Noel Certainly is in good old Brit land. These Amprius batteries blow Tesla batteries out of the water. https://newatlas.com/energy/amprius-450-wh-kg-battery/
March 20, 20224 yr Author Rob, did you ever examine your rotors for cracks in your racing cars? When I was working on and driving the LIMRV test train at the DOT test track in Colorado after every run I would back the vehicle into the hangar and one of the MEs would go down in the pit with an ultraviolet light and spray something on the rotors that would make the cracks show up. They never changed the rotors, the just monitored crack growth and/or new cracks. They were very small. Noel Edited March 20, 20224 yr by birdguy The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
March 21, 20224 yr 10 hours ago, Rob_Ainscough said: Brake pad material is design for a specific heat range Affirmative young Mr Robert, re temp range. I'm comparing the longevity of discs years ago, compared to today. I read that modern discs are now softer than they used to be, the excuse being that its to improve braking. In reality its probably to squeeze more dosh notes out of drivers. In my experience, they certainly do wear out faster these days. Doesn't take long before there's a lip deep enough to fail the MOT. I'm referring to normal cars like we mortals drive, not your X-Men super hero racing cars. 😀 Edited March 21, 20224 yr by martin-w
March 22, 20224 yr Author How does speed effect the range of electric cars? For instance, to traverse New Mexico from north to south on I-25 it is about 450 miles from Raton to Las Cruces. The speed limit for the most part is 75mph. It drops for a few miles while going through Albuquerque. Can any electric car make the trip non-stop (about 7hrs) at 75mph on a full charge or will it have to stop at a charging station and how long would that stop be? Noel The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
March 22, 20224 yr 1 hour ago, birdguy said: How does speed effect the range of electric cars? For instance, to traverse New Mexico from north to south on I-25 it is about 450 miles from Raton to Las Cruces. The speed limit for the most part is 75mph. It drops for a few miles while going through Albuquerque. Can any electric car make the trip non-stop (about 7hrs) at 75mph on a full charge or will it have to stop at a charging station and how long would that stop be? Noel Well nobody should drive for 7 hours without stopping, it's not a safe thing to do. But hypothetically, there are one or two cars that boast that range for example the Mercedes EQS, 453 miles, but in the real world they achieve less. But yes, speed reduces range. I recall at a supercharger you can charge to 80% in about 20 minutes. The thing about charging, as you may have noticed with your phone, is that packing the last 20% of electrons in, is the slowest. Incidentally, Samsung have just finished their first solid state battery prototype production line. Edited March 22, 20224 yr by martin-w
March 22, 20224 yr Author 4 minutes ago, Rob_Ainscough said: speed isn't as much of a factor as throttle input I don't know what you mean by that Rob. I'm assuming electric cars have cruise control to maintain a constant speed. I'm also assuming that the faster you drive to sooner the battery will have to be recharged. I've driven that route and there are hills to climb and descend. I am assuming hill climbing will drain more energy from the battery and going downhill will recharge it. My Prius has a braking mode on the 'gear' selector. There is a relatively steep grade of over a mile on the way to Ruidoso. Once, as a test on my previous car, I selected the braking mode at the top of the hill. I started down at 65 mph and was only doing 15mph at the bottom and my battery got fully charged. In the drive mode I would have been doing 90 or more the bottom of the hill without touching the brake. Noel The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
March 22, 20224 yr Author 5 minutes ago, Rob_Ainscough said: I don't know what your model year Prius range is, but in my older 2006 Prius we never managed to get 400 miles on a tank when doing freeway driving, at 75-80 mph our Prius mileage was around 38-40 mpg on I5 freeway, only in city driving did we get 50 mpg. My current one is a 2019. But the higher mileage is rated for city driving. On the highway there isn't much chance to switch to electric unless you are going downhill. The highway between Roswell and Ruidoso rises about 4,000 feet in 70 miles. I used a lot of gas going up and a lot less coming back down. Noel The tires are worn. The shocks are shot. The steering is wobbly. But the engine still runs fine.
March 23, 20224 yr Talk about blowing the competition away, check out Aptera Motors. They have a solar/electric car that has 1000 miles range!!! 👍 https://aptera.us/vehicle/ It's a small three wheel car that is extremely efficient with 700 watts of solar power. 25,000 US dollars. You will have to accept the science fiction movie styling, but what a great concept, ONE THOUSAND miles range. Clearly the deign is to optimise aerodynamics, it's not just to look like something from Star Trek. According to the website, with the low mileage I do and where I live, I wouldn't have to charge it al all. 😮 If you live in the middle of the US and drive 30 miles a day, you'd have to charge it 1.46 times per year. Quote Aptera was created from the ground up with one purpose in mind — energy efficiency. Our unique shape allows Aptera to slip through the air using 30% of the energy compared to other electric and hybrid vehicles on the road today. Travel up to 1,000 miles on a single charge Capable of up to 40 miles of solar powered driving per day Edited March 23, 20224 yr by martin-w
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