09-20-2019, 04:00 PM
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#51 (permalink)
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Not Doug
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They always say that school buses are safer without seatbelts. If we hit something head-on, or something rear-ends us, sure, especially if it is smaller. The passengers will bounce off of padded seat backs, but I am pretty sure that in any other scenario, kids are bouncing around at a high rate of speed.
I have seen school buses that seated seventy-two kids. How much would the seatbelts cost? Who is responsible for them staying buckled?
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"Oh if you use math, reason, and logic you will be hated."--OilPan4
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09-20-2019, 05:18 PM
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#52 (permalink)
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AKA - Jason
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Quote:
Originally Posted by oil pan 4
Heat pumps are more efficient but they still eat battery and the colder it gets the more they have to rely on resistance heat.
Around freezing they pretty much only use resistance heat to warm the compressor oil, but as the temperature goes down and heat demand goes up a resistance grid kicks on more and more to get usable heat.
For my leaf if I can install a diesel fired coolant heater I can stay nice and toasty and not eat up range.
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Old and inefficient heat pump do that but newer ones don't. I installed a Lennox MPA a couple years ago. It maintains 100% of the rated BTUs down to 0F and still works down to -22F. It doesn't even have a resistance heater. (Of course it is a 24.5 SEER unit not the 13 SEER minimum allowed by law) |
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09-20-2019, 05:59 PM
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#53 (permalink)
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Human Environmentalist
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Does it run cycles in reverse to defrost?
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09-20-2019, 10:04 PM
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#54 (permalink)
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Corporate imperialist
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I have noticed that the highest efficiency lowest ambient temp units have really big heat exchangers. May be practical for a school bus.
I'm sure it has a resistance heater on the compressor for the oil.
They have to run reverse defrost cycle.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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09-20-2019, 11:16 PM
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#55 (permalink)
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AKA - Jason
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Quote:
Originally Posted by redpoint5
Does it run cycles in reverse to defrost?
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Yes. |
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09-21-2019, 06:30 AM
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#56 (permalink)
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Somewhat crazed
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Based on experience, you need gobs of heat (technical term) to keep the front windows clear. The added webasto diesel heaters I had are rated 60k btu hr and you really need them during loading but they don't keep up.
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09-21-2019, 12:05 PM
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#57 (permalink)
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Corporate imperialist
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My little leaf likes around 5,000 btu per hour if I'm lucky.
On cool near freezing humid mornings.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
Last edited by oil pan 4; 09-21-2019 at 01:54 PM..
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09-22-2019, 01:38 PM
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#58 (permalink)
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Not Doug
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So, large electric vehicles are ideal for San Diego? 
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"Oh if you use math, reason, and logic you will be hated."--OilPan4
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09-23-2019, 11:11 AM
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#59 (permalink)
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Somewhat crazed
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No, but there is less climate issues however.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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09-23-2019, 02:21 PM
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#60 (permalink)
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Master EcoModder
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Iowa decided all new school buses will have lap-shoulder seat belts, adds $8,000 to the cost, average bus cost is $90-100,000.
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