Some sobering video of what NOT to do towing |
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offgrid
Senior Member Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
Topic: Some sobering video of what NOT to do towing Posted: 11 Dec 2019 at 6:57am |
Trailer sway is actually a pretty complex dynamics problem. I did a search once and found a couple of papers which concluded that FEA modeling was needed to analyze it properly.
The key though I think I s to be sure your rig is self damping, as there are always going to be random lateral force inputs (sudden maneuvers, air pressure from a passing truck, etc) which can set off sway. To be sure you’re self damped, you can very carefully apply a steering input while you’re running down a straight traffic free stretch of highway. Your rig shouldn’t oscillate more than one cycle before returning to straight and level. If it doesn’t then move weight forward in the trailer and/or remove it from the rear of the trailer. Personally I do this test without sway control, the add sway control for an additional margin of safety. |
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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Colt
Senior Member Joined: 16 Nov 2019 Online Status: Offline Posts: 383 |
Posted: 07 Dec 2019 at 1:01pm |
Dang autocorrect! Uncapped = undamped.
Great video! It readily shows how having the CG behind the initial center of rotation becomes so quickly unstable. Seeing makes understanding much easier. |
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John
'16 R-Pod 180 |
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GlueGuy
Senior Member Joined: 15 May 2017 Location: N. California Online Status: Offline Posts: 2624 |
Posted: 06 Dec 2019 at 9:09am |
There are many short videos on the net that show how this can happen. This is one of them.
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bp
2017 R-Pod 179 Hood River 2015 Ford F150 SuperCrew 4WD 3.5L Ecoboost |
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Colt
Senior Member Joined: 16 Nov 2019 Online Status: Offline Posts: 383 |
Posted: 05 Dec 2019 at 9:37pm |
So, ..... what kicks off the swaying? Once it starts, it looks uncapped and just grows.
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John
'16 R-Pod 180 |
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crankster78
Senior Member Joined: 08 May 2018 Location: Minn Online Status: Offline Posts: 163 |
Posted: 14 Jul 2019 at 7:47am |
Greetings: A couple of days ago, traffic cams picked up a incident in the MN metro area. The SP stopped a TV with about a 25 foot trailer for a violation. The Driver decided to take off. Bad idea! The SP place stop sticks on the roadway, the driver swerved to avoid, lost control, rolled the whole rig. Now, not only wrecking everything he is facing multiple charges. Isn't it fun to know that your sharing the road with folks like this??? Crankster78
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Crankster 78 R-179 2015
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podwerkz
Senior Member Joined: 11 Mar 2019 Location: Texas Online Status: Offline Posts: 966 |
Posted: 15 Jun 2019 at 10:14am |
Most of that will buff right out.
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r・pod 171 gone but not forgotten!
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StephenH
podders Helping podders - pHp Joined: 29 Nov 2015 Location: Wake Forest, NC Online Status: Offline Posts: 6283 |
Posted: 15 Jun 2019 at 7:01am |
It is always better to arrive slower and alive than dead and in a box.
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StephenH
Happy is the man that findeth wisdom,... ouR escaPOD mods Former RPod 179 Current Cherokee Grey Wolf 24 JS |
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Shane
podders Helping podders - pHp Joined: 09 Sep 2018 Location: Northern IL. Online Status: Offline Posts: 98 |
Posted: 15 Jun 2019 at 12:36am |
As a truck local truck driver I am going to say that most are from over speed. That's why in some states they give speed limit for regular traffic and a limit for trucks and vehicles pulling trailers. I am never in a hurry when I am pulling any type of trailer, myself and my family depend on me getting back home in one piece.
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ENGINE 55,TRUCK 44,BATALLION 12
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lostagain
Senior Member Joined: 06 Sep 2016 Location: Quaker Hill, CT Online Status: Offline Posts: 2583 |
Posted: 13 Jun 2019 at 9:55am |
+1 to offgrid and GlueGuy. Also of note there was some pretty aggressive driving in many of these crashes. Failure to yield, unsafe lane changes, excessive speed, and a basic lack of courtesy in driving.
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Never leave footprints behind.
Fred & Maria Kearney Sonoma 167RB Our Pod 172 2019 Ford F-150 4x4 2.7 EcoBoost |
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GlueGuy
Senior Member Joined: 15 May 2017 Location: N. California Online Status: Offline Posts: 2624 |
Posted: 13 Jun 2019 at 9:25am |
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bp
2017 R-Pod 179 Hood River 2015 Ford F150 SuperCrew 4WD 3.5L Ecoboost |
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