Old forum Archive
This is where all the topics from the old forum that was shutdown are saved in a read-only forum. You can refer to it on this forum by using a link or copying the data over.
http://archive.aluminiumcamperforum.com/

Author Topic: How well do you do?  (Read 4785 times)

rob

  • Newbie
  • *
  • Posts: 6
    • TV and RV:
      2009 Vibe 2.4l

    • 2015 QS 8.1
    • View Profile
How well do you do?
« on: July 02, 2015, 08:33:55 PM »
My TV is a 2.4l, 5 speed (manual), 2009 Pontiac Vibe.  The trailer is a 2015 QS 8.1 with rear deck.

Drove just over 500km (310 miles) to pick it up from the dealer so I decided to check out my mileage.  All driving was done on secondary highways (mostly Ontario Hwy 7).

TV without trailer received 6.6l/100km (35.6 mpg).  On the way back, with dry trailer, 8.2l/100km (28.6 mpg).  A big difference on the way back was my driving style.  I downshifted to slow and help stop.

Paul

  • Administrator
  • Hero Member
  • *****
  • Posts: 720
    • TV and RV:
      2016 Ford F150

    • 2018 Camplite 21BHS
    • View Profile
Re: How well do you do?
« Reply #1 on: July 02, 2015, 10:32:33 PM »
hi Rob without the trailer i usually get 9-10l/100km (26-23 mpg) but with my 13QBB i get between 18-20l/100km (13-11 mpg) depending if its hilly or not
2014 Ford Escape
2015 Camplite 13QBB
2016 Ford F150
2018 Camplite 21BHS

rideandfly

  • Global Moderator
  • Sr. Member
  • *****
  • Posts: 428

    • 2010 Mighty 11 Sold
    • View Profile
Re: How well do you do?
« Reply #2 on: July 02, 2015, 11:21:13 PM »
Our TV gets 23 to 25MPG unloaded. Towing the CampLite 11 gets 13 to 14MPG.
Bill

DavidM

  • Premium Member
  • Sr. Member
  • **********
  • Posts: 346
    • TV and RV:
      2013 Nissan Pathfind

    • Camplite 16 TBS
    • View Profile
Re: How well do you do?
« Reply #3 on: July 03, 2015, 10:10:23 AM »
It is interesting, but not surprising. Weight doesn't make that much difference.

My 16TBS probably weighs at least 50% more than an a CL 11 but I get about the same mileage as rideandfly.

But the QS8 with its low profile (and lighter weight still) gets in the upper 20s.

Frontal area makes all of the difference. If you could tow an inflated bounce house and it would get horrible mileage.

David

Merlin

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 767
    • TV and RV:
      2017 Land Cruiser

    • 2015 Camplite 16TBS
    • View Profile
Re: How well do you do?
« Reply #4 on: July 03, 2015, 11:50:05 AM »
I'd love to see a wind tunnel smoke test of a TV+Camplite. I'll bet the turbulence underneath and behind both the TV and the trailer are astounding, to say nothing of the huge wall of air pushed up by the front at speeds over 50mph.
Michigan

J_Westy

  • Newbie
  • *
  • Posts: 26
    • View Profile
Re: How well do you do?
« Reply #5 on: July 03, 2015, 12:30:58 PM »
It is interesting, but not surprising. Weight doesn't make that much difference.

My 16TBS probably weighs at least 50% more than an a CL 11 but I get about the same mileage as rideandfly.

But the QS8 with its low profile (and lighter weight still) gets in the upper 20s.

Frontal area makes all of the difference. If you could tow an inflated bounce house and it would get horrible mileage.

David

To get a little nerdy, you can estimate fuel consumption impacts from the following:

Rolling Resistance + (Weight x Hill_Grade) + (Weight x Acceleration) + Wind Drag

Rolling Resistance is basically a constant. Can't do much but use low rolling resistance tires like hybrids and electric cars often use.

Weight*Hill_Grade theoretically cancels out on a round trip since you go up and down hill

Weight*Acceleration is a factor, but you have to accelerate up to the speed you want to drive, so the only thing you can do is keep your weight down.

Wind drag is the big one. It's a function of the coefficient of drag (Cd) and Speed Squared (Speed x Speed). The Cd of a Camplite is much much higher than a Quicksilver. And small changes in speed make a huge difference since it's squared -- for example, the difference in fuel used due to drag when you drive 75 mph versus 50 mph would be 1.5 x 1.5 or 2.25 the fuel needed to overcome drag.


DavidM

  • Premium Member
  • Sr. Member
  • **********
  • Posts: 346
    • TV and RV:
      2013 Nissan Pathfind

    • Camplite 16 TBS
    • View Profile
Re: How well do you do?
« Reply #6 on: July 03, 2015, 12:42:26 PM »
Wind drag is the big one. It's a function of the coefficient of drag (Cd) and Speed Squared (Speed x Speed). The Cd of a Camplite is much much higher than a Quicksilver. And small changes in speed make a huge difference since it's squared -- for example, the difference in fuel used due to drag when you drive 75 mph versus 50 mph would be 1.5 x 1.5 or 2.25 the fuel needed to overcome drag.

Well, not quite right. Wind drag is approximately equal to the frontal area x Cd x speed^2.  The Cd is either empirically derived, ie it is a fudge factor, or it can be calculated using physics that is beyond me. The QS has a relatively low frontal area compared to the CL but I suspect that the CL has a better Cd due to its rounded front although the TV's wind shadow on the QS probably makes the empirical Cd come out about equal.

David

rideandfly

  • Global Moderator
  • Sr. Member
  • *****
  • Posts: 428

    • 2010 Mighty 11 Sold
    • View Profile
Re: How well do you do?
« Reply #7 on: July 03, 2015, 01:46:47 PM »
It is interesting, but not surprising. Weight doesn't make that much difference.

My 16TBS probably weighs at least 50% more than an a CL 11 but I get about the same mileage as rideandfly.

But the QS8 with its low profile (and lighter weight still) gets in the upper 20s.


David

Always wondered about buying a larger CampLite by 2' to 5' longer, if MPG decrease much. David answered my question.   My fuel economy is 13 to 14MPG around 60MPH with the 2000lb CampLite 11/Frontier Rig. The Frontier has 261HP 4.0L V6. It's about 1 to 2MPG better with my 2003 Tacoma with 140HP 2.4L 4 cylinder with manual transmission, but that rig suffers performance wise in the mountains.

We used to have a 1987 Toyota Pickup with manual transmission with R22 120HP 4 cylinder engine and towed a 1000lb Chalet A-frame pop-up. The fuel economy was around 22MPG @ 60MPH. I could just barely get the CampLite 11 up to 55MPH on level interstate with that TV, never checked fuel economy with that rig.

1987 Toyota Pickup/Chalet Rig:



Tacoma:



Frontier:

« Last Edit: July 03, 2015, 02:23:42 PM by rideandfly »
Bill

J_Westy

  • Newbie
  • *
  • Posts: 26
    • View Profile
Re: How well do you do?
« Reply #8 on: July 03, 2015, 02:33:19 PM »
Wind drag is the big one. It's a function of the coefficient of drag (Cd) and Speed Squared (Speed x Speed).

Well, not quite right.

Oops... You're absolutely right.. I had the Cd and Frontal Area lumped together in my head as single shape/size factor. Thanks.

pjcd

  • Full Member
  • ***
  • Posts: 229
    • TV and RV:
      2011 Duramax

    • Camplite 21RBS
    • View Profile
Re: How well do you do?
« Reply #9 on: January 05, 2017, 12:04:46 PM »
I have a 2011 Duramax, when towing I get around 17mpg, (I'm little heavy on the foot). My old Dodge 3/4 ton truck got around 9mpg with a tail wind, going down hill.

Pinstriper

  • Full Member
  • ***
  • Posts: 225
  • There ain't no such thing as too much tow vehicle
    • TV and RV:
      '07 F-150

    • CL 14DBS
    • View Profile
Re: How well do you do?
« Reply #10 on: January 05, 2017, 10:51:07 PM »
12-13 mpg regardless of the F-150 5.4 or the 4Runner with the V-6.

The F-150 pulls a bit better, but actually the 4Runner has manual shifters and I can do better controlling the RPM/power balance on hills.

When not towing, the 4Runner gets 19 or so, the F-150 15-16.

The F-150 is a bit more stable ride when towing.

tco2612

  • Jr. Member
  • **
  • Posts: 51
    • View Profile
Re: How well do you do?
« Reply #11 on: January 07, 2017, 04:35:48 PM »
16 MPG not towing 12 MPG towing a Camplite 11" 1994 K1500 Suburban 71000 miles that's 65 MPH and below,above that and it goes down fast.

kybrowns1

  • Newbie
  • *
  • Posts: 17
    • TV and RV:
      2009 Honda Odyssey

    • 2013 Quicksilver 10.
    • View Profile
Re: How well do you do?
« Reply #12 on: January 07, 2017, 09:07:25 PM »
My 2009 Honda Van not towing traveling 65 mph will average 24-25mpg. That's loaded down with family.

Towing the 10.0, and loaded down with family and camping gear will get 18-20. Lately it's been closer to 18-19.

Air resistance is huge factor. I would buy a bike rack for the top of the van, but I don't want take a huge hit mpg when I travel across country during the Summers.


Sent from my iPhone using Tapatalk

gbpack

  • Full Member
  • ***
  • Posts: 229
    • TV and RV:
      Jeep Grand Cherokee

    • '15 21BHS
    • View Profile
Re: How well do you do?
« Reply #13 on: January 08, 2017, 12:22:41 AM »
With our Jeep Grand Cherokee (with V-8), we get 10-11 mpg towing our 21BHS and around 20 mpg when not towing (both while averaging 65 mph on the road). With a tailwind we have gotten 12-13 mpg and one time we only got 8 mpg driving into a stiff headwind of 30 mph. Overall we are happy with the performance and mileage results of the Jeep. We know that we are giving up some mpg with the V-8, but it's really great having all of that power and towing capacity, especially when towing in the mountains where I can accelerate and gain speed while going up a steep grade with no problem, if I want to. One time I decided to get out of the slow lane while going up a steep grade in WV because the semi in front of us had slowed down to about 40 mph because of the grade, so I decided to move out around him. We were fully loaded with our trailer in tow, but I hit the gas and we took off up the mountain and passed him like he was standing still. Absolutely love the Hemi V-8!
« Last Edit: January 08, 2017, 12:24:52 AM by gbpack »

Hey Voss

  • Newbie
  • *
  • Posts: 24
    • TV and RV:
      '05 Passat wagon TDI

    • 2013 Quicksilver 8.0
    • View Profile
Re: How well do you do?
« Reply #14 on: September 11, 2017, 07:07:44 PM »
New personal best mpg! Towing a full 8.0 with an '05 VW Passat wagon TDI getting an average of 35mpg! That just 6mpg shy of what typically get towing nothing.
« Last Edit: September 11, 2017, 07:11:10 PM by Hey Voss »
"Of all the paths you take in life, make sure a few of them are dirt." - John Muir