Yamaha 2400/ Towing 2 Cents |
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StephenH
podders Helping podders - pHp Joined: 29 Nov 2015 Location: Wake Forest, NC Online Status: Offline Posts: 6290 |
Topic: Yamaha 2400/ Towing 2 Cents Posted: 14 May 2017 at 9:04am |
Not all semis are set up he same. Some have the panels for directing airflow at the bottom. It may be those that send more of a surge of air your way and cause more sway. I noticed it as well, but I did not note which ones were the ones which caused more sway. I'll have to try to figure that out next time we are out. Also the speed at which the semis are traveling relative to you probably play a factor in it as well.
Of course, if one is in front of you and traveling at the same relative speed, it is nice to drop in behind and take advantage of some drafting help. I don't like to follow close enough to take full advantage though. |
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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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malkbean2
Groupie Joined: 31 Jan 2017 Online Status: Offline Posts: 80 |
Posted: 14 May 2017 at 7:47am |
i drove from chicago to key west and back on mostly interstates at 60 mph with 178 rpod and passed only 2 vehicles (not counting mountain areas). Every single semi passed me and there was a lot of them. By the way I experienced sway (with a sway bar) from some semis after they passed not during or before they passed. and only some semis not most of them. Weird huh?
2016 Grand Caravan was TV |
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voisj
Senior Member Joined: 19 Jul 2016 Location: San Luis Obispo Online Status: Offline Posts: 471 |
Posted: 10 Feb 2017 at 12:07pm |
This thing I learned today. After 65MPH my mileage plummets, now I understand why. Thanks! John
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StephenH
podders Helping podders - pHp Joined: 29 Nov 2015 Location: Wake Forest, NC Online Status: Offline Posts: 6290 |
Posted: 02 Feb 2017 at 4:30pm |
I think you mean Our Pod for the physics tutor. He is the one that gave the formula. I was just using it to generate some examples. I also got the message. |
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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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Blue Highways
podders Helping podders - pHp Joined: 20 Sep 2016 Location: NC mountains Online Status: Offline Posts: 84 |
Posted: 02 Feb 2017 at 10:12am |
Wow, GREAT intelligent discussions. I would say R-Pod owners here are 'smarter than the average bear'.
Stephen, I could have appreciated you as a valued math & physics tutor back in school for sure.... Sometimes, I will rack up a little extra momentum on a highway that's dipping across a valley, in order to get past a cluster of Semi trucks that are really going to bog down on the next incline. I really got Our Pod's message about the increased energy (21%) in a crash based on the factor of elevated speed. Maybe I will reconsider, and "tow slow, amigo" ( I mean, what's the hurry, the campsite's reserved. ) Thanks all, --B
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Farrier2112
Newbie Joined: 26 Nov 2016 Online Status: Offline Posts: 7 |
Posted: 02 Feb 2017 at 9:25am |
Thanks for the info. Why Synthetic oil? What weight and brand should I buy? I've been using ethanol free gas in all my small engines. I foresee a problem if I need to buy more gas in different states. Thanks again for your help,
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techntrek
Admin Group - pHp Joined: 29 Jul 2009 Location: MD Online Status: Offline Posts: 9059 |
Posted: 01 Feb 2017 at 9:21pm |
I had that Yamaha and it didn't have a problem. However you lose power the higher you go and the hotter it is, so you can lose up to 1/3 of your power at altitude on a hot day. Plus the A/C is harder to start the hotter it is. So it might work fine in your driveway but not work right when you need it the most. Use synthetic oil and test it on the hottest day of the year.
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Doug ~ '10 171 (2009-2015) ~ 2008 Salem ~ Pod instruction manual
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StephenH
podders Helping podders - pHp Joined: 29 Nov 2015 Location: Wake Forest, NC Online Status: Offline Posts: 6290 |
Posted: 01 Feb 2017 at 1:19pm |
Thank you for providing the math It isn't quite exponential, but it is also not linear. If I got it right, then an increase from 60 to 65 is 1.08333333 times greater. Rounding to 1.08 and then squaring that gives 1.1664, which when rounded gives 1.17 times greater or 17% times greater. An increase from 60 to 70 yields an increase of 25% in wind resistance. An increase from 60 to 75 mph yields an increase of 56%. What throws a real monkey wrench into trying to figure this out is one has to account for the wind. It has been a LOOOOOOOONG time since I took Physics in High School. Trying to figure out the additional force (or decrease if it is a tailwind) is way beyond my ability at this point. However, would a 20 mph headwind mean that if you are towing at 60 mph, the force is equal to if you are towing at 70 mph? It sure feels that way. |
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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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TheBum
Senior Member Joined: 26 Feb 2016 Location: Texas Online Status: Offline Posts: 1407 |
Posted: 01 Feb 2017 at 10:13am |
The only time we have problems with our 3.5L V6 Highlander pulling our 179 is in high winds, especially headwinds. I've been pleasantly surprised at how well it handles at highway speeds. We do have the tow prep package with the larger alternator and transmission cooler, so that may have a great deal to do with it.
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Our pod
Groupie Joined: 03 Oct 2016 Location: Olympia WA Online Status: Offline Posts: 62 |
Posted: 31 Jan 2017 at 10:36pm |
Wind resistance varies with the square of the speed. If you compare 60 mph to 66 mph, you can see that the higher speed is 1.1 times greater. This 1.1 squared equals 1.21, which means that the wind resistance is 1.21 times greater (also equal to 21% greater).
It also means 21% more energy is in the package should you crash. Tow slow, amigo. |
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Life is good.
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