Would rolling resistance change significantly with a larger diameter tire? What is the max diameter tire that would fit in the wheel covers? I am exploring the best way to get the drivers seat higher. Any suggestions?
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I was assuming that the height-adjustment hardware would add too much weight, so a fixed-height arrangement would yeild more stability with less mass. Interchangeable parts (for a small accessory-type fee) would personalize it without compromizing anything else, and it wouldn't disrupt the assembly process.
@Dan Roberts If the reality is that the welded framework of the seat is what is being bolted to the floor, then maybe some optional composite or steel pieces could raise the seat without any serious mods.
As for the subject line, the reason for small diameter wheels/tires is lower unsprung rotational mass.
When researching wheels/tires for my Fiat 500e, I discovered that when all else is equal, including total tread diameter, taller sidewalls on a smaller wheel is lighter. That improves the ride over bumps, & also improves acceleration & braking.
You gain MOST of the acceleration losses with regenerative braking, but not ALL of them, so the lighter the wheels, the better.
Hay, don't forget me! I had two 240Zs. My favorite was the one I could look down to my right, and see the spinning U-joint and drive shaft. I love simplicity!
Remember that an extra inch of tire diameter only gets you 1/2 inch further off the pavement. If ground clearance is the objective, the Off-Road-Kit is the obvious choice.
In a recent video, co-founder Chris Anthony said the the seat height would be lowered to provide more headroom. Depending on your height, you might like my earlier suggestion to offer the taller seat hardware as an optional bag of parts for those that prefer to sit a little higher.
@Ken Potter I will be watching with much interest for more information on the off road package and what suspension modifications that might include. I understand that they are lowering the seat height two inches. I’m thinking that may drop the seat height to 14” which is too low for me with my mobility issues so I will be looking for options that will allow me to use this awesome vehicle
@Dan Roberts They may have some limitations around the Elaphe in wheel motor, and working within the confines of the the aerodynamic wheel covers etc
But with the extreme range options Aptera hopes to deliver… Is roll resistance a big concern
A appreciate how you and many are living up to Aptera’s efficiency mission/focus, with the treads I read!
I hate to take a range hit for AWD, plus possible off road kit, but a 60kWh battery pack will more than cover my “anticipated travel need“
I never plan to take my Aptera “Off Road” The few miles of (graded) primitive roads I travel is my only reason. A tire with more ply might be advantageous for my unique environment
I have been blessed to live in my amazing environment for five years but never had as many flats here….as I had over 45 years! So tires will be a close focus for me
Can‘t wait to strike a balance with Aptera and my piece of heaven, both powered by the sun!
That is a big height difference. Could it be that way for esthetics? Perhaps to have low air resistance the shroud had to be long. Then they made it taller so the height esthetically balance the length. (?) Pure speculation.
I just hope the wheel shroud light brightness can be controlled, because I want them to be bright so others will see them.
I was assuming that the height-adjustment hardware would add too much weight, so a fixed-height arrangement would yeild more stability with less mass. Interchangeable parts (for a small accessory-type fee) would personalize it without compromizing anything else, and it wouldn't disrupt the assembly process.
As for the subject line, the reason for small diameter wheels/tires is lower unsprung rotational mass.
When researching wheels/tires for my Fiat 500e, I discovered that when all else is equal, including total tread diameter, taller sidewalls on a smaller wheel is lighter. That improves the ride over bumps, & also improves acceleration & braking.
You gain MOST of the acceleration losses with regenerative braking, but not ALL of them, so the lighter the wheels, the better.
Wow! Popular car!! Wr reunite with the upcoming Aptera!
Sounds like there are at least three of us that had the old Datsun 240Z!
I don’t recall the seat adjustment either.
Well I didn’tv need it …as it fit me like a glove! Fun memories! Best with cross country trip!
In my younger year I had a 240Z as well. Loved syncing the dual carbs. Finally went to Webbers. I never knew there was a height adjustment available.
My 1972 Datsun 240Z had a super-light height adjustment:
2" long bolts coming down from the seat bottom, with four 1/2" plastic spacers.
For a higher seat, put more spacers on before bolting it down.
For a lower seat, put less spacers on before bolting it down.
Leftover spacers are stored on the ends of the long bolts.
It certainly should have an adjustable height driver's seat. I thought that was standard in even base model cars now.
Remember that an extra inch of tire diameter only gets you 1/2 inch further off the pavement. If ground clearance is the objective, the Off-Road-Kit is the obvious choice.
In a recent video, co-founder Chris Anthony said the the seat height would be lowered to provide more headroom. Depending on your height, you might like my earlier suggestion to offer the taller seat hardware as an optional bag of parts for those that prefer to sit a little higher.
They have only talked about a 16” wheel