Magazine Q3-2021 -- ONE -- paperturnV2 - Flipbook - Page 17
When we decided to pull the trigger on some testing, we knew we were in
for some interesting results. Grand Design RV committed to loaning us a
double-axle Momentum Travel Trailer and we secured a 2021 Ford
F-250 single-axle Super Duty truck to tow with.
NaviStar Proving Grounds in New Carlisle Indiana is no stranger
to rigorous testing. Formerly the Studebaker testing track constructed in
the late 1920’s, we were confident in the rich history and expertise of
NaviStar and the team that supported our project.
After two days of instrument set up on the trailer, Adam flew to
Indiana to oversee the testing, joined by CEO Gerry Lamberti and
Creative Director, Tom Bateman.
The tests included a semi-trailer pass by with each vehicle traveling at 60mph, a durability test over cobblestones, dirt road simulations,
uneven road conditions, and various other torturous surfaces to evaluate the Trailer SumoSprings under scrutiny. The test was designed to
examine the springs on two fronts: first, to see how the trailer would
move side-to-side, from tail to top, and what type of sway was present.
Secondly, we wanted to see if we could see a reduction in G-force
vibration. This one was especially important to us, given the feedback
from users praising the springs ability to reduce vibration and what that
means for extending the life of the trailer. As Adam noted,
“If you took a house, picked it up, and shook it, the whole thing
would rattle and loosen. It’s important to measure G-force vibration at
the smallest levels because that is the largest contributor to RV issues
during the first year and beyond.”
A semi-truck passes the travel trailer, each traveling at 60mph, to test wind and sway
An on-board live feed to the data capture records speed and movement of the springs
While we were confident that we would see positive testing results, there’s
nothing quite like good news! After working with the talented team at
NaviStar and having our Director of Data, Justin Tevis, decipher the results,
what we suspected was confirmed in an objective conclusion.
Trailer SumoSprings showed over 100% higher average displacement at every interval. This means that at any given point, the distance
between the trailer frame and the factory suspension was on average,
double. At one particular point, that displacement was 462% higher which
shows a decrease in spike loading and reduction in events that cause
Our proudest result was (drum-roll please...) Trailer SumoSprings
reduced G-force in the trailer by an average of 68%. What we were sure
was there before, is now confirmed beyond any doubt.
G-force in the trailer by an
average of 68%.
ABOVE LEFT The instrumentation capturing the data was set up on the island inside the trailer.
ABOVE RIGHT Each axle was filmed with Go Pro cameras to show the movement during each test throughout the proving grounds.
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