LightShip Update 7/28/25

[turbopilot]

Looking at all the reported efficiency information so far at highway towing speeds (around 62 MPH), efficiency for any tow vehicle can be thought of in quartiles when towing a LightShip. Towing a slab sided high profile trailer reduces tow vehicle efficiency by about 50% compared to the efficiency seen in the tow vehicle not towing. Pulling a LightShip with TrekDrive OFF you can expect about 75% of the non-towing tow vehicle efficiency. Towing the LightShip with TrekDrive ON you can expect 100% of the tow vehicle efficiency when not towing.

I currently tow an Airstream. Owing to the aerodynamic profile of the Airstream I normally see around 60% of the non-towing efficiency of my F-150 PowerBoost.

This rule of thumb works pretty well for any tow vehicle type: EV, HEV or ICE.

Cruising at higher highway speeds will give a much more dramatic improvement comparing the LightShip to a slab sided trailer as you get in impact of "velocity squared" working in the drag equation.

Correcting some misinformation posted earlier the LightShip coefficient of drag is .23 (roughly the same as a Tesla Model 3), while the Airstream coefficient of drag is .58. Both of these drag coefficients are for the trailer in tow following in the wake of a tow vehicle.

Here is Grok's explanation:


OverviewThe coefficient of drag (Cd) is a dimensionless measure of a vehicle's aerodynamic resistance to airflow, where lower values indicate better efficiency (less drag). For towable RVs, Cd is often evaluated for the trailer alone or the tow vehicle-trailer combination, as the trailer's shape significantly affects overall towing efficiency, especially at highway speeds. The LightShip AE.1 is a modern, all-electric travel trailer designed with advanced aerodynamics, including a telescoping "Dual Mode" body that lowers for travel to minimize drag. Airstream towables, iconic for their teardrop shape, are also relatively aerodynamic compared to boxy competitors but rely on traditional aluminum construction without active drag-reduction features.Based on available data, the LightShip AE.1 demonstrates superior aerodynamics, with a Cd comparable to high-efficiency sedans. Airstream models have higher Cd values, though they outperform many conventional RV.

Key Comparison

Aspect	LightShip AE.1	Airstream Towable (e.g., Sport Models)
Reported Cd	≈0.23 (for tow vehicle-trailer combo; on par with Tesla Model 3 sedan)	0.58 (for 16-22 ft Sport models; typical range 0.3–0.6 across models)
Design Features	Telescoping roof lowers frontal height by ~35-40% in "Road Mode," smooth leading edges, integrated TrekDrive motors to assist propulsion and reduce effective drag.	Iconic rounded "silver bullet" shape reduces drag by ~25% vs. boxy competitors (e.g., 28-ft model vs. 35-ft rival), but fixed height limits optimization.
Efficiency Impact	Enables near-zero range loss when towing with EVs; <250 Wh/mi energy use in combo. 3x more aerodynamic than typical trailers.	Improves fuel economy vs. non-aero RVs but adds significant drag (e.g., 43% reduction in tow vehicle Cd when paired optimally).
Sources	Forum analysis citing design specs ; LightShip claims .	Airstream Forums calculation ; typical range from comparative analysis ; wind tunnel tests .

Analysis

• LightShip AE.1 Advantage: Its Cd of ~0.23 is roughly 40-60% lower than Airstream's, translating to substantial savings in fuel/charge consumption during towing. This is achieved through automotive-inspired CFD (computational fluid dynamics) optimization, making it ideal for EV towing where range anxiety is a concern.
• Airstream Strengths: While higher in Cd, Airstream's design still yields 25% less total drag (CDA, which factors in frontal area) than many larger, boxier trailers . For a comparable ~25-ft model, expect 20-50% more drag than the LightShip.
• Caveats: Cd values can vary by test conditions (e.g., wind, speed, combo setup). LightShip data is often for the integrated system; isolated trailer Cd may differ slightly. Airstream's figures are model-specific and from user/forums analyses, as official Cd isn't always published.

In summary, the LightShip AE.1 outperforms Airstream in drag efficiency, prioritizing modern EV compatibility over traditional styling. For gas/Diesel towing, Airstream's Cd remains competitive among legacy RVs.

 

[Holdmybeer]

Thanks so much for posting these helpful numbers!

I was a little surprised to see the “0.9 m/kWh with Trailer and without TrekDrive”, as I saw figures about the same for people towing Airstreams with the R1T (e.g. 1.0mi/kWh here: First 1800 Miles Towing Airstream with R1T), and expected the Lightships’s low-profile and other enhancements would lead to a better figure than a halving of the miles per kWh before factoring in TrekDrive (where you’re using battery power to propel the trailer).

I feel I might be missing something, so I’d appreciate any insights from you knowledgeable folks.

When Oppenheimer was excitedly informed by a colleague that small scale nuclear fission had been achieved in Europe he rushed to the chalk board and by mathematical proof demonstrated nuclear fission was impossible. The next day Oppies collegue did an experiment in the lab achieving fission, after which Oppie admitted the proof was wrong. If after 1800 miles the fellow in the R1T got ~1.1 mile/kWh. towing an Airstream that would seem pretty reliable.

 

[Jeffgtx]

We really need a thread comparing the LightShip and the Pebble. Both are unique new RV's so I am trying to figure out a way to compare the two without it looking like I am degrading the Pebble. @josephRV, in my opinion you made the right choice. I have been following both LightShip and Pebble from the beginning and have gotten to know Ben, Toby and LightShip team very well with frequent visits to the factor in Broomfield. There is a reason the largest RV company in the world, Thor Industries, invested in LightShip.

Pebble has elected to have their own owner's forum. Interesting to follow along. The first Pebble is now in customer hands with some early reports.

Hi @turbopilot
Full disclosure, i am new here and essentially new to RVing overall. I have been reading your posts with great interest as they are very detailed and often times help me understand not only the what, but the why. So thank you for that.

Two questions have been floating in my mind and compelled me to join the forum, so i hope you don’t mind me asking here in your thread as I feel this is where best to ask.

I had the opportunity to see the pebble this weekend in Seattle and was very pleased. It checks most of my boxes and when i build a comparable lightship, which for the record, i also find very cool, it costs much more, and money is an object for me with this potential purchase. So, i wonder, have you seen a detailed comparison since you made the post above? I would be curious to see what the trade offs are that i might be missing and if there is more to it than i am seeing.

And secondly, did you ever make any progress on the incinerating toilet idea?

Thank you again.

 

[Rory (Lightship Team)]

Hi @turbopilot
Full disclosure, i am new here and essentially new to RVing overall. I have been reading your posts with great interest as they are very detailed and often times help me understand not only the what, but the why. So thank you for that.

Two questions have been floating in my mind and compelled me to join the forum, so i hope you don’t mind me asking here in your thread as I feel this is where best to ask.

I had the opportunity to see the pebble this weekend in Seattle and was very pleased. It checks most of my boxes and when i build a comparable lightship, which for the record, i also find very cool, it costs much more, and money is an object for me with this potential purchase. So, i wonder, have you seen a detailed comparison since you made the post above? I would be curious to see what the trade offs are that i might be missing and if there is more to it than i am seeing.

And secondly, did you ever make any progress on the incinerating toilet idea?

Thank you again.

Think it will be best for @turbopilot to speak (and I think he has DM'ed you) and give you his third party perspective!

But if we can help here at HQ - please don't hesitate to send me a message! Or swing by our SF/CO facilities any time.

 

[josephpRV]

Hi @turbopilot
Full disclosure, i am new here and essentially new to RVing overall. I have been reading your posts with great interest as they are very detailed and often times help me understand not only the what, but the why. So thank you for that.

Two questions have been floating in my mind and compelled me to join the forum, so i hope you don’t mind me asking here in your thread as I feel this is where best to ask.

I had the opportunity to see the pebble this weekend in Seattle and was very pleased. It checks most of my boxes and when i build a comparable lightship, which for the record, i also find very cool, it costs much more, and money is an object for me with this potential purchase. So, i wonder, have you seen a detailed comparison since you made the post above? I would be curious to see what the trade offs are that i might be missing and if there is more to it than i am seeing.

And secondly, did you ever make any progress on the incinerating toilet idea?

Thank you again.

Hey @Jeffgtx ... I know you directed this at @turbopilot, but I did an evaluation of the Pebble vs. Lightship and thought I'd share my logic with you. I actually posted a similar version to this over on the Rivian forums.

BACKSTORY:

We actually had deposits down on both Lightship and Pebble. Lightship was our early frontrunner after seeing it at Overland Expo Loveland, then Pebble moved ahead on paper based on specs. After seeing the Pebble in person at Overland Expo Arizona, we ultimately returned to Lightship. Both are strong products, but they’re optimized for different use cases. Lightship simply matched ours better.

Why we chose Lightship

1. Living space

The interior openness is the biggest differentiator. At Loveland, we had six adults inside the trailer plus a salesperson, all comfortable, talking for over two hours. That’s unusual in any travel trailer, electric or otherwise.

2. Interior connection to the outdoors

The 270° window design changes how the trailer feels. You can experience the surroundings without needing to be outside. For us (especially my glamping-leaning wife), that mattered more than expected.

3. Tow-ability (aero + TrekDrive)

The Lightship aero package is so smart (road mode to camp mode and back), which means that if I can't dual charge the Rivian and the Lightship in transit, I still get the benefit of their road mode aero-efficiency pushing me beyond 125 to 150 miles before a re-charge. On top of that TrekDrive (as I've tested it) returns me back to usual Rivian efficiency.

4. Larger battery (77 kWh)

The bigger battery improves assisted towing range via TrekDrive and meaningfully extends off-grid capability.

What advantages Pebble still had

1. Auto-hitching and auto-parking

These are genuinely compelling features, especially for solo maneuvering.

2. Office / Murphy-bed layout

Very smart use of space but a little too compact for our liking.

3. A disadvantage we felt was the internal layout - very cramped when compared to having 6 adults comfortable in the Lightship vs. 2 "working around each other" in the Pebble.

Summary

After spending time inside the Lightship it simply became a no brainer given the added length translated directly into practical open space livability. On top of that the Lightship facility is 1 hour north of where we live, which for a new category product and early VIN, we figured would be advantageous.

For what it's worth, I think the (current) three electric trailers on the market are all optimized to solve different issues.

• Lightship AE.1 → towing efficiency and aero-electric optimization
• Pebble Flow → all-electric convenience and automation
• Evotrex PG5 → onboard generation / energy independence

There are other more subjective factors like livability, but that comes down to preferences. Given the size of the purchase we weren't going to proceed until we'd seen them both in person (the Evotrex wasn't a product when we purchased). So I would definitely take @Rory (Lightship Team) up on a factory visit if you can swing it.