Renovation and aerodynamic improvement of a BPW closed trailer

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Ahmed
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Ahmed » 31/08/22, 21:26

Are you sure airplane wings hold together with "pop" rivets? : Mrgreen:
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Macro
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Macro » 31/08/22, 21:26

Ahmed wrote:Maybe you want to use "pop" rivets? This fixing is not suitable for structural parts, especially on an assembly subjected to rolling stresses; in your place I would use self-tapping sheet metal screws: it resists vibrations very well and in general, the mechanical solidity is excellent.

I've had stainless steel pops on my motorcycle muffler for decades...they don't have any play...but for riveting plastic...they will go through
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Ahmed
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Ahmed » 31/08/22, 22:17

Yes, the "pop" in stainless steel are much stronger...
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gildas
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View gildas » 31/08/22, 22:19

Interesting project...

I like "umbrella" pegs and they exist to fix sheet metal panels;
pegs.png
ankles.png (264.78 KiB) Viewed 470 times
Last edited by gildas the 31 / 08 / 22, 22: 22, 2 edited once.
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Christophe
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Christophe » 31/08/22, 22:22

Ahmed wrote:Are you sure airplane wings hold together with "pop" rivets? : Mrgreen:


It's rivets all the same... go and explain the difference to us...
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Christophe » 31/08/22, 22:24

Macro wrote:
Christophe wrote:
A rivet should not work in shear but for the assembly of light sheets (not subject to differential shear) it's good... Uh aren't rivets what we use for aircraft wings?

.


Yes...the eiffel tower is also entirely riveted...but there are rivets and rivets...I have the son of a friend who riveted the "cannards" of the rafale...it was...interesting ...


The Eiffel Tower is hot riveted...it's a very heavy method : Mrgreen:
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Christophe
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Christophe » 31/08/22, 22:26

Ahmed wrote:Yes, the "pop" in stainless steel are much stronger...


And that's probably what's used in aviation...
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Christophe » 31/08/22, 22:31

Here are the photos of the day:

Axle_Al-ko.jpg


Trailer_structure_avant.jpg
Remorque_structure_avant.jpg (194.99 KiB) Viewed 463 times


And for the back I considered making a 1m extension in the following 3 configurations, which one do you prefer?

Trailer_rear_1m_front.png
Remorque_arrière_1m_avant.png (250.76 KiB) Viewed 463 times


Rear_trailer_1m.png
Remorque_arrière_1m.png (99.18 KiB) Viewed 463 times
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Obamot
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Obamot » 31/08/22, 22:37

And the height of the roof, will it deploy?
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Remundo
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Re: Renovation and aerodynamic improvement of a BPW closed trailer




View Remundo » 31/08/22, 22:43

the one that gives you the most closed surface is the red one.

for aero I think gold is the best choice. It makes it possible to "reattach" the lines of current separated from the front.

there will still be turbulence, but the primary criterion of a trailer is not aerodynamics.

the blue one is easier to build, but it will turbulate severely at the rear.
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