meinnovations
Active member
- First Name
- Mike
- Joined
- Jan 26, 2026
- Threads
- 3
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- 32
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- 16
- Location
- Seattle
- Vehicles
- MS, MY, MX, CB
- Occupation
- engineer
- Thread starter
- #1
TLDR; Do you have wh/mi data to share for bed cap (which cap?) vs. just a closed tonneau?
Hello all. New CB owner trying to collect data to decide on bed cap, pop-up camper, camper shell, pop-up trailer, etc. I did some cursory searches on bed cap range data but didn't find anything here. Ideally, I would like to have direct comparisons with about a year of data to account for wind, temperature, elevation change, and weight with bed cap model. For instance, my 3k mi lifetime wh/mi with no load is 410, nearly all with tonneau closed but a couple hundred miles of tests with a #4k railed trailer w/solid 4' tailgate on moderately hilly terrain and about 50/50 30MPH/65MPH speeds. In a couple pseudo-scientific real-life tests (not controlled), a 10-20MPH wind had a greater impact than payload:
#2k trailer 45MPH avg, 1,000' elevation; no payload, headwind: 800 wh/mi; tailwind: 600 wh/mi; +#2k payload tailwind: 700wh/mi
By way of comparison with R1T:
#10k trailer w/tractor/loader/backhoe (rails removed), 1,500' elevation: 900 wh/mi; #2k flatbed trailer: 550 wh/mi; #2k trailer with rails and sail, er, tailgate on in headwind: 800 wh/mi; tailwind 700 wh/mi
Thank you, aspiring sexagenarian DIY builder and light adventurer seeking to fully exploit FUSC and FSD before adventuring is no longer fun/I die.
Hello all. New CB owner trying to collect data to decide on bed cap, pop-up camper, camper shell, pop-up trailer, etc. I did some cursory searches on bed cap range data but didn't find anything here. Ideally, I would like to have direct comparisons with about a year of data to account for wind, temperature, elevation change, and weight with bed cap model. For instance, my 3k mi lifetime wh/mi with no load is 410, nearly all with tonneau closed but a couple hundred miles of tests with a #4k railed trailer w/solid 4' tailgate on moderately hilly terrain and about 50/50 30MPH/65MPH speeds. In a couple pseudo-scientific real-life tests (not controlled), a 10-20MPH wind had a greater impact than payload:
#2k trailer 45MPH avg, 1,000' elevation; no payload, headwind: 800 wh/mi; tailwind: 600 wh/mi; +#2k payload tailwind: 700wh/mi
By way of comparison with R1T:
#10k trailer w/tractor/loader/backhoe (rails removed), 1,500' elevation: 900 wh/mi; #2k flatbed trailer: 550 wh/mi; #2k trailer with rails and sail, er, tailgate on in headwind: 800 wh/mi; tailwind 700 wh/mi
Thank you, aspiring sexagenarian DIY builder and light adventurer seeking to fully exploit FUSC and FSD before adventuring is no longer fun/I die.
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