gday all
I have a roof top tent on a 3/4 length rack and when on the free way you can really feel the drag from it being on there aswel as higher fuel comsumption.
So i was thinking about making like a flow over ramp for the air like you see on trucks on top of the cab. Has anyone done this?? pics, advice, ideas would be awsome.
cheers
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Reducing wind drag ideas
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Reducing wind drag ideas
95 GQ td42
3"lift 33 claws
covered in mud
3"lift 33 claws
covered in mud
Get 1 roof rack, place as far forward as necc.
Attach aluminum plate to rack to add support at front of plate and attach the trailing end to top of tent section.
Not sure what would be the best way to go about making it removable to access your tent though.
Attach aluminum plate to rack to add support at front of plate and attach the trailing end to top of tent section.
Not sure what would be the best way to go about making it removable to access your tent though.
Don't expect to see my recipe, until I receive my cheque and collection fee
whilst some of the drag is caused by the vacume behind the vehicle, im not sure about saying most of the drag.tweak'e wrote:something to think about......
most of the drag is from how the air forms BEHIND the vechile. the smoother you can make the airflow jion back up at the rear the better.
trucks focus on reducing the drag at thew front of the vehicle whilst the rear is a slab, if the rear was so important they would have a fold over shape on the rear to improve it I would think.
Im not an expert in any way shape or form, but every commercial attempt at reducing drag on 'loads' is done at the front.
however yes ther is drag at every point top, sides, back etc etc.
Apart from a buffer on the front i would think its just a part of life.
*there's a rock, drive over it :) there's a bigger rock, drive over it :twisted: there's an even bigger rock, oops broke it :oops: Upgrade broken bit :bad-words:
Goto *
Goto *
most of the drag is certain a the rear. have a look at all the aerodynamic shaped vehicles/planes etc. typically big at the front and then tapering to a point at the rear. its the turbulence which causes the drag which is all in how the air flow meats up at the rear of the vehicle.
trucks don't taper the rear as they need the room for cargo which pays the bills. its a case of they can't do anything to the rear, they can only do the front.
you can make a front bit to make the air flow over the top, just got to get the shape and height roughly right so the air flows over the top and joins nicely when it comes back down and joins the rest of the air flow. you could also fit a tail behind the tent. that helps the airflow join up better wit the vehicles airflow.
also if possible have rounded corners rather than square on anything exposed to the wind.
trucks don't taper the rear as they need the room for cargo which pays the bills. its a case of they can't do anything to the rear, they can only do the front.
you can make a front bit to make the air flow over the top, just got to get the shape and height roughly right so the air flows over the top and joins nicely when it comes back down and joins the rest of the air flow. you could also fit a tail behind the tent. that helps the airflow join up better wit the vehicles airflow.
also if possible have rounded corners rather than square on anything exposed to the wind.
yes mate i hear your pain, i got a full length roof top tent and without a doubt she pulls you back and drinks the fuel. Add to this mine mounted on rhino bars mounted ontop of a heavy duty arb bar! so its high. I put the arb wind deflector in the rack which is hard to measure the effect. You do see occassionally on such a rack the luggage or tent sat slightly back and perspex or alloy sheet attached to the front of the rack but simply twice as high. I can only see it helping but will just look di#ky if its on there when tent not on. If always on then no probs.
bingham
bingham
2015 200 Series Gx TTD - ................ Fark 3L's -
could be thought i read it was tear shape but possibly egg similar shape
http://www.wonderquest.com/beer-streamline-size.htm
second question down[/url]
http://www.wonderquest.com/beer-streamline-size.htm
second question down[/url]
What I like to say to the buy a GQ thing....
my MQ is a convertable, hows about your GQ! The Finger
my MQ is a convertable, hows about your GQ! The Finger
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