sleepy
Oak Ridge,Tennessee
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Joined: 04/07/2003
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I've hade quite a few requests for information about the airfoil that has been on my Lance 1161 for the last three years. Some of the requests have been during our travels, some from another post on the forum. > > Questions... which T/C pictured are the most ....?
2003 Lance 1161,/slideout/AGM batteries/255W Solar/propane generator/Sat dish/2 Fantastic Fans/AC/winter pkg
AirFoil, Trimetric, LED lights, Platcat vent heat
2003GMC K3500 LT/Crewcab/duramax diesel/allison/dually/4x4/OnStar/front reciever mounted spare
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sleepy
Oak Ridge,Tennessee
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Joined: 04/07/2003
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sleepy
Oak Ridge,Tennessee
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Joined: 04/07/2003
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sleepy
Oak Ridge,Tennessee
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Joined: 04/07/2003
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I hope these came through... I'm on WiFi and it's another first for me.
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bcs
Albany,Or,USA
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Joined: 10/23/2003
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What is this? I'm sorry but I can't get me bearings to figure out where this goes, and what it does ?? 
'00 ArticFox 1150, torklift
'02 F350 CC 4x4 V10 auto 3:73-LS, Firestone ride-rites, RMX monotubes, Toyo M608z 245/70R19.5
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sleepy
Oak Ridge,Tennessee
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rdp58
East Tennessee
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Joined: 12/01/2005
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Sleepy, How much better fuel mileage do you get with the air foil? Thanks for the good information.
See how Lance left me holding the BAG.
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sleepy
Oak Ridge,Tennessee
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Joined: 04/07/2003
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As you apparently recognize the airfoil does more tha eliminate bugs on the bulkhead. It gently moves the air that normally gets caught under the cabover to the outside along with the bugs... it also eliminates much of the drag that is associated with that area.
We found that over more than 10000 miles we have had about a 10% increase in fuel economy.... about 1 1/2 miles/gal.
Our lifestyle also contributes to decent fuel economy.... we seldom exceed 63 mph. Doing engineering studies our optimun speed would be about 48 mph... up to 48 mph the fuel is expended in pulling the weight of our rig, above 48 mph the drain on fuel economy is drag... and our drag is based on pushing an area 8' wide and 11 foot tall. At speeds of 70mph our fuel effiency drops a third. At 80 mph to 1/2.
Every little bit of drag eliminated counts. The airfoil works simply and well... for a couple of hours work and less than $20 in materials.
Now to lower the drag on the back of the camper!
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j37642
East Tennessee
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Joined: 01/12/2004
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Sleepy, thanks very much for posting. I have printed out your sketch and will try to get one made. It is impressive. I need to understand the rear sides on the airfoil better. By that, I mean the slope. Don't know how much or how you are attaching so it will hold...just glue?
I am looking into installing Airtabs to help on eliminating the vacuum in the rear. They are quite expensive. Thanks again Chet... Jerry
Jerry 35J Bounder Diesel motorhome
2005 Lance 1181 Max with all options
2003 Dodge Laramie 3500 CTD HO DRW, Air bags, SprSprngs, Rancho R9000X, XM Radio, Garmin GPS, Hellwig sway bar, Centramatics
..RVing since 1966
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sleepy
Oak Ridge,Tennessee
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Joined: 04/07/2003
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I don't have any opinions about the tabs... i'll wait on your experiences.
I only used existing screw holes... in the trim of the camper... no glues etc.
Another camper with the airfoils: Michigan Rod's from this forum.
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