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Cargo trailer conversion

CPRBUSA

Slow speed, large wake
Joined
Feb 8, 2022
Member Number
141
Posts
25
Location
Idaho
Well, I'm not the first to not follow the rules :)
 

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EGR

Well-known member
Joined
Feb 9, 2022
Member Number
474
Posts
220
Location
TN
Demco open car hauler with a few mods. 100% mine. Yes, aero works very well, thanks. Google bluff body aerodymamics. Coast down testing. Bring your math.
 

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SnakeOiler

Well-known member
Joined
Feb 12, 2022
Member Number
661
Posts
135
Location
NM
Sorry no inside pics
 

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EGR

Well-known member
Joined
Feb 9, 2022
Member Number
474
Posts
220
Location
TN
Weird Alice again. Exterior.

Aero is a thing. Flying models childhood. Small sailboats counterpoint to bikes. Best bud is seven time SSA open class champ…

Found a used Demco DT6000HD I could afford and started from front building enclosure in 3ft 4ft 5ft 4ft sections bolted together and to bed. That is longer than the bed cuz first box extends front. The tilt up front beak was last. Took months so the trailer was on the road in between each section going to the mtns or to TD. First version was too light and did not weather well. Dis assembled. Rebuilt. Gross with TD load is 3920 Cat scale. Two bikes, gear, tools, ez up paddock stuff yada yada.

Most trips include a five mile interstate down grade. Coastdown test numbers every trip, each configuration. Beginning hit a mark at top at sixty and lift. Rig would stabilize at about 65 open trailer two bikes junk strapped on. Now same exact load except weight of the box. When it touches 70 back shift sprinter to fourth. 75 back shift to three and brush brakes every half mile. Pretty sure aero matters. LOL
7602CB53-047D-4BCA-89F4-EAC8A1B04F65.jpeg
80C68950-F71A-4F43-BC7F-D79B2E0859CC.jpeg
27F0989D-D0EA-4B08-AC98-393489154FBA.jpeg
 

Nepa Cheeseburgers

Well-known member
Joined
Feb 10, 2022
Member Number
600
Posts
130
Location
NEPA
Weird Alice again. Exterior.

Aero is a thing. Flying models childhood. Small sailboats counterpoint to bikes. Best bud is seven time SSA open class champ…

Found a used Demco DT6000HD I could afford and started from front building enclosure in 3ft 4ft 5ft 4ft sections bolted together and to bed. That is longer than the bed cuz first box extends front. The tilt up front beak was last. Took months so the trailer was on the road in between each section going to the mtns or to TD. First version was too light and did not weather well. Dis assembled. Rebuilt. Gross with TD load is 3920 Cat scale. Two bikes, gear, tools, ez up paddock stuff yada yada.

Most trips include a five mile interstate down grade. Coastdown test numbers every trip, each configuration. Beginning hit a mark at top at sixty and lift. Rig would stabilize at about 65 open trailer two bikes junk strapped on. Now same exact load except weight of the box. When it touches 70 back shift sprinter to fourth. 75 back shift to three and brush brakes every half mile. Pretty sure aero matters. LOL
7602CB53-047D-4BCA-89F4-EAC8A1B04F65.jpeg
80C68950-F71A-4F43-BC7F-D79B2E0859CC.jpeg
27F0989D-D0EA-4B08-AC98-393489154FBA.jpeg
Interesting lip and wings on rear in last photo!!!!
In a sentence could you tell me how it helped?

Wiggle?
 

Nepa Cheeseburgers

Well-known member
Joined
Feb 10, 2022
Member Number
600
Posts
130
Location
NEPA
Weird Alice again. Exterior.

Aero is a thing. Flying models childhood. Small sailboats counterpoint to bikes. Best bud is seven time SSA open class champ…

Found a used Demco DT6000HD I could afford and started from front building enclosure in 3ft 4ft 5ft 4ft sections bolted together and to bed. That is longer than the bed cuz first box extends front. The tilt up front beak was last. Took months so the trailer was on the road in between each section going to the mtns or to TD. First version was too light and did not weather well. Dis assembled. Rebuilt. Gross with TD load is 3920 Cat scale. Two bikes, gear, tools, ez up paddock stuff yada yada.

Most trips include a five mile interstate down grade. Coastdown test numbers every trip, each configuration. Beginning hit a mark at top at sixty and lift. Rig would stabilize at about 65 open trailer two bikes junk strapped on. Now same exact load except weight of the box. When it touches 70 back shift sprinter to fourth. 75 back shift to three and brush brakes every half mile. Pretty sure aero matters. LOL
7602CB53-047D-4BCA-89F4-EAC8A1B04F65.jpeg
80C68950-F71A-4F43-BC7F-D79B2E0859CC.jpeg
27F0989D-D0EA-4B08-AC98-393489154FBA.jpeg
So I take it you no Sam Moore ?
I did SSGT and A/S Nationals for 25 years,
Gosh the money I spent lol
But I don’t regret it , lol
 

EGR

Well-known member
Joined
Feb 9, 2022
Member Number
474
Posts
220
Location
TN
Interesting lip and wings on rear in last photo!!!!
In a sentence could you tell me how it helped?

Wiggle?
The lip is actually a rain shield for top of ramp when it is closed. There is no seal. About inch gap actually.

The vortex generators reshape the attached flow off the trailer sides to prevent formation of large wrap around vortices in the low pressure on back of the box. In bluff body aero those big trailing vortices are major drag source. All the research was NACA in the ‘30s ‘40s.

Google Air Tabs. A Canadian company selling primarily to otr freight people. They have exceptionally good tech presentation online.
 

EGR

Well-known member
Joined
Feb 9, 2022
Member Number
474
Posts
220
Location
TN
So I take it you no Sam Moore ?
I did SSGT and A/S Nationals for 25 years,
Gosh the money I spent lol
But I don’t regret it , lol
No I do not. My friend would for sure. I actually sort of minimize hanging around. He is super nice, laid back and fiercely competitive. He was very close to World champ once. Race face and all that. A woman mentee was World champ recently.
 

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