Reply
 
Thread Tools Display Modes
Old 08-12-2018, 02:00 PM   #1
Senior Member
 
Delco Bobby's Avatar
 
Join Date: Aug 2015
Location: Media, PA
Posts: 1,984
Sucking and Turbulence

While reading about be sucked in to other vehicles while driving on the highway I decided to start a specific thread on the subject.

My REV24 RB is much less affected by other vehicles than my previous Sunseeker of about the same length.

1. The sucking in seems to happen more often with busses than trucks. But it occasionally happens with smaller vehicles including SUVís.

2. It may be that the closer I am in my lane to the offending vehicle the more likely I will be sucked in. If a bus and I are both close to the lane stripes I can be taken in by surprise.

3. Not all busses and tractor trailers suck me in.

4. I usually donít feel turbulence from tractor trailers but when I do it is significant. I havenít determined what causes the few to give me a hard time. Some will bother me only while I am behind them in the same lane while in most cases there is no problem. Some will bother me if I am behind them in an adjacent lane but most donít .

5. I find it interesting that the larger, heavier rigs have the sucking in problem.

6. Dynamax should have installed some sort of anti attraction, anti sucking device on our motorhomes along with a turbulence mitigator .

7. #6 was not serious.

8. Comments are welcome.
__________________

__________________
2017 Dynamax REV 24RB
2018 Ford F-150

Formerly a 2013 Sunseeker 2250 SLEC.
Delco Bobby is offline   Reply With Quote
Old 08-12-2018, 03:10 PM   #2
ETF
Senior Member
 
Join Date: Mar 2013
Posts: 107
We all know what causes it but I have no idea how to mitigate it. I will say that the DX3 37TS seems to be a lot, lot better than the Forester we had previously. When a big rig would pass you in it, you got pushed over towards the shoulder. When you compensated to get back in your lane and straightened out, the tail end of the semi would pass you and you got sucked over towards it. It made for some stressful driving.

I think that the additional weight and better suspension on the DX3 helps. I know that some of the other members will have a much better technical explanation and more than a few remedies.
__________________

ETF is offline   Reply With Quote
Old 08-12-2018, 03:18 PM   #3
Senior Member
 
caswelld's Avatar
 
Join Date: Jun 2017
Location: Greerís Ferry Lake, AR
Posts: 463
There can be control issues with passing 18-wheelers depending on speed and wind direction. It seems that with a crosswind a passing truck or bus is even more likely to give our MH a push. Here are some fixes that I have found to help considerably: Sumos, Safe-T-Plus steering damper, upgraded shocks, an upgraded sway bar. We have all but the Safe-T-Plus on our Isata 3 and we normally don't experience any affect from large passing vehicles. Although, with the right wind and highway speed we occasionally get a little push.

You can look around on the forums to see what others think of these. IRV2.COM should have a chassis specific area that may also help.

https://www.supersprings.com/products/sumosprings
Products | Safe T Plus
https://www.bilstein.com/us/en/
Hellwig - Load and Sway Control Products

Happy camping



Dave
__________________
Dave & Julie
2018 Isata-3 24FW - Invisibrake/Roadmaster Falcon All-Terrain Tow Bar - 2017 Fiat 500 Abarth towed
2015 Tiffin Allegro 36LA-Wrangler Sahara Unlimited towed
caswelld is offline   Reply With Quote
Old 08-12-2018, 03:56 PM   #4
Senior Member
 
hook47's Avatar
 
Join Date: Sep 2017
Posts: 236
In NASCAR they call it "side drafting". Whatever you do don't try "bump drafting"!
__________________
2018 DX3 37RB - 2017 Jeep GC Summit towed
hook47 is offline   Reply With Quote
Old 08-12-2018, 04:13 PM   #5
World Wide Wanderer
 
wahoonc's Avatar
 
Join Date: Feb 2016
Location: Sprung Leak, NC
Posts: 1,536
Look up Bernoulli's Principle.

Aerodynamics most definitely come into play. Your current rig is not as much of a flat box as your previous one was. I have noticed a marked difference even in cars, my 2011 Subaru Legacy would get pushed around a fair bit, my 2018 Honda Accord or 2015 Ford Fusion not nearly as much.

Aaron
__________________
Aaron & Rhonda
wahoonc & Airangel60

2016 Coachmen Concord 300DS
2015 Fusion Hybrid following along
wahoonc is offline   Reply With Quote
Old 08-12-2018, 04:15 PM   #6
Momma Camps Often
 
Join Date: Mar 2018
Posts: 316
When I am passing one of those "suckers" or when I see one coming to pass me, I move to the farthest side of my lane away from them to maximize the side distance between us. Nearly all 18-wheelers do this, too. When they see us coming, or as they approach, watch them - they move to their outermost point in the lane. Very considerate.
__________________
HAPPIEST WHEN CAMPING!
2019 Rockwood 2104s ****
2017 Starcraft Satellite 16KS
2012 Jayco X23B Hybrid
2009 R-Vision C243S Hybrid
2006 Coleman Bayside PUP
HappyCamper1962 is offline   Reply With Quote
Old 08-12-2018, 04:25 PM   #7
Senior Member
 
old40ford's Avatar
 
Join Date: May 2017
Posts: 466
My 5th wheel is not effected by trucks, buses or anything that I have noticed, but, my 30ft car hauler is just as you described. I thought I was going crazy when I notice how bad a bus made me move. Like you and others, I try to keep an eye out for them and move as far over as I can from them. Seems to help some.
__________________
Retired Auto body teacher/Retired RV Dealer GM
2017 Puma 255RKS
2013 F-150 King Ranch Super Crew 5.0
No Kids
No Pets
But lots of Fun traveling with my wife
old40ford is offline   Reply With Quote
Old 08-12-2018, 05:32 PM   #8
Senior Member
 
Delco Bobby's Avatar
 
Join Date: Aug 2015
Location: Media, PA
Posts: 1,984
Seems like I need to remember to move further away in my lane.

Passing is not a big deal because I am anticipating some lateral movement.

My main problem is when I don't notice a fast mover come up on me and they take me by surprise. On turnpikes and similar roads I am usually doing 65 to 75.

Still wondering why some 18 wheelers cause unpleasant turbulence but most don't.
__________________
2017 Dynamax REV 24RB
2018 Ford F-150

Formerly a 2013 Sunseeker 2250 SLEC.
Delco Bobby is offline   Reply With Quote
Old 08-12-2018, 11:15 PM   #9
Senior Member
 
Join Date: Jan 2018
Posts: 788
The one piece of advice that kept going through my head during my purchase process was a friend of mine bought a Class A and cant remember what kind or how big. He told me he left for Florida his first trip and was white knuckled but thought it would go away as he drove. He said not only was he white knuckled all the way there but all the way back home. That was his first and only trip in the Coach. He traded it immediately on a Jayco Seneca and swears by the Super C. He would offer no advice on brand or size but offered a lot about not buying the Class A...

Bought a Dynamax 37TSHD.. I took his advice.
__________________
2019 Dynamax Force TSHD
Mountieman is offline   Reply With Quote
Old 08-12-2018, 11:45 PM   #10
Senior Member
 
Join Date: Jul 2017
Location: Currently - Clinton, WA. Still taking things to Eastern WA as we empty our S&B.
Posts: 528
Quote:
Originally Posted by Delco Bobby View Post
Seems like I need to remember to move further away in my lane.

Passing is not a big deal because I am anticipating some lateral movement.

My main problem is when I don't notice a fast mover come up on me and they take me by surprise. On turnpikes and similar roads I am usually doing 65 to 75.

Still wondering why some 18 wheelers cause unpleasant turbulence but most don't.
I am new to all of this but in reading this thread, two things occur to me.

1. Busses are boxes on wheels. _Some_ big rigs are boxes pulling boxes. The point is that as the boxes shove aside (displace) air they cause turbulence. Some truckers spend considerable time and money making their rigs slice the air efficiently thus increasing their economy and reducing the wind effect. Perhaps a partial answer?

2. There have been times when I have been startled by a trucker going in the opposite direction. I always seem to check for strong cross winds AFTER one of these incidents. I have not looked to see if the truck who rocked my world had those devices under their trailer to cut down on the turbulence or not. I am betting it did. Maybe the same thing you have noticed.
__________________

__________________
As a teacher my signature was, ďIf you think education is expensive, try ignorance.Ē

As a novice Glamper, it still applies.
RobertDS is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Featured Campgrounds

Reviews provided by


Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 07:08 AM.