RTT Fairing questions

#1
So, the wind noise from my RTT above 40 mph gets pretty bad in my Impreza. I'm planning a fairing to hopefully help in this department.

Rigged up a piece of cardboard to get an idea of what it would look like and wanted some opinions. Is it better to go at a steep angle with a bigger faring to the top of the tent, or is a shorter one at a more gentle approach a better way to go? I THINK the wind noise is from the wind bopping between the tent and the roof, but I don't have any data to back that up other than how it sounds.
 

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#4
I have a thule fairing for your car I am not using. Are you up near NJ anytime soon?

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Don't think I'll be up to Jersey anytime soon. If I haven't figured something out by November I might be able to swing up there when I'm in D.C.

I'll let you know; thanks!
 
#5
I have a thule fairing for your car I am not using. Are you up near NJ anytime soon?

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Don't think I'll be up to Jersey anytime soon. If I haven't figured something out by November I might be able to swing up there when I'm in D.C.

I'll let you know; thanks!
No problem, Ill get pictures when i can.

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80t0ylc

Hill & Gully Rider
#6
So, the wind noise from my RTT above 40 mph gets pretty bad in my Impreza. I'm planning a fairing to hopefully help in this department.

Rigged up a piece of cardboard to get an idea of what it would look like and wanted some opinions. Is it better to go at a steep angle with a bigger faring to the top of the tent, or is a shorter one at a more gentle approach a better way to go? I THINK the wind noise is from the wind bopping between the tent and the roof, but I don't have any data to back that up other than how it sounds.
That looks like a sun roof under the front of your RTT. If it is, I've got the same issue with my '94 Land Cruiser and CVT RTT. I don't want to rain on your parade, but the best way that I get away from the noise is to keep it shut and also close the inside cover shade. My hard shell RTT is a lot more streamlined than your Tepui and it still has annoying wind noise. You might be able to improve the fuel mileage with a fairing, but IMHO, not the wind noise. I think you're at least partially right about the gap, though, but any slipstream interference will produce some noise. Good luck with your experimenting. Let us know your results.
 
#7
No problem, Ill get pictures when i can.

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Thanks!

That looks like a sun roof under the front of your RTT.
No sunroof here. I made sure to get a car without one to reduce wind noise. We do a 12+ hour drive (each way) at least once a year to visit family. You really start to notice the road noise when you are driving that long.

Hoping to make a cheap prototype soon so I'm not out much if it doesn't help. At worst, I'll go in and sound insulate the roof, which is something I was considering before the tent anyway.
 
#8
So, quick update. I attached the cardboard with some gaffer's tape to the front of the car and tent. I wasn't able to really tell much as far as a difference in noise generation. I suspect the cardboard+tape prototype wasn't the best idea as the thing flew off while I was on the highway at 70 mph.

In short, I'll need something stiffer and better attached for future tests.
 

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