grinding hitch-steep driveways - Page 2 - Fiberglass RV


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Old 12-02-2015, 07:17 PM   #15
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The Ultimate Jack is available from Tractor Supply, and at least around here they are usually in stock.

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Old 12-02-2015, 07:59 PM   #16
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One of the unique problems I have observed and experienced when towing 13' FGRV's (I have had three), is that when they are tongue high (vs. Level or slightly nose down) is that they can tend to get a little light on the hitch at speeds over about 55 MPH (Where legal of course)


This sorta suggests that something that Pilots know as "Ground effect lift" is pushing up on the front of the trailer, shifting weight towards the back and contributing to possible stability issues.


Only a theory, but one I have experienced on both a 13' Scamp and a 13' Little BigFoot when they were towed a bit on the high side.


That said, if the trailer is already level, raising the hitch for clearance reasons may induce a more critical problem than an occasional ground scrape.
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Old 12-03-2015, 12:57 AM   #17
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I have had the same problem in SoCal, hardly anywhere else.
The only way to maintain the proper attitude of your trailer while being towed and correct your dragging problem is to raise the frame of the trailer which would allow you to raise your ball height.
Putting a spacer between the axle and frame mount, changing the axle or bigger tires are the only ways I know of to do that.
Personally I'm just careful going over those issues and don't worry about it.
Fred
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Old 12-03-2015, 04:08 AM   #18
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Yup, I did a 3" lift because of tail dragging too. Have had no problems with sway or anything else with it. I think any comments of possible CG is a moot point with an egg. YMMV
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Old 12-03-2015, 08:02 AM   #19
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Quote:
Originally Posted by FRED SMAILES View Post
I have had the same problem in SoCal, hardly anywhere else.
Funny you say that… The worst driveway I have yet encountered was a gas station in the hills west of Riverside, CA. I swung around and pulled into traffic at an angle at least 60 degrees off perpendicular. Very slowly. Success!

Quote:
Originally Posted by FRED SMAILES View Post
Personally I'm just careful going over those issues and don't worry about it.
My idea, too. My replacement center tongue jack protrudes a bit further than the original factory jack (which the PO mangled, thankfully with no collateral damage), maybe 4-5", so it seems more vulnerable than the nut on the ball. In three years, with care, I haven't had a strike. The Ultimate Jack is tempting, though…

I agree that merely raising the front of the trailer, if it creates a tongue-up attitude, is likely worse than doing nothing.
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Old 12-03-2015, 08:42 AM   #20
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Quote:
Originally Posted by Borrego Dave View Post
Yup, I did a 3" lift because of tail dragging too. Have had no problems with sway or anything else with it. I think any comments of possible CG is a moot point with an egg. YMMV
My comment concerning possible stability issues pertained to actual experiences, when the hitch height was raised above level, not the entire trailer. In my examples, the stability problem experienced at speed was corrected when the hitch height was lowered to bring the trailers down to level. (BTW: Same trailers, same TV's)

This condition may be more common on 13' trailers as the hitch ball to axle center is much shorter. But that's only a guess. If someone want to build a hitch system that measures changes in actual hitch weight at different speeds and chassis attitude this may be proved or disproved. Until then, I am sticking with my story ... LOL

FWIW: One only need read the final report on the 1982 Air Florida crash in Washington, DC to know the meaning of "Ground Effect Lift".
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Old 12-03-2015, 09:51 AM   #21
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Originally Posted by MAP 56 View Post
where can i get one of those jacks ? and can you pull it out the top.
I ordered this jack Ultimate Jack site: "http://theultimatejack.com/?page_id=143"
I notice that you are Canada like me.

Warning.
After completing my order, I received an email asking me extra for the customs clearance.

I paid the extra as requested.

I received the Jack about a week after completing the order.
It works great for me.

Approximately two weeks later, I received another invoice Customs asking me to pay customs clearance. I communicated and explained that I had already paid for these expenses.

He explains that when the seller filled the control leap, if it did not identify the amount for Customs in the box, it is to the receiver to pay.
The customs officer sees the amount on the control leap and says it's Fedex who recovered this amount because it's not identify in the good box on the control leap.

Here is the example that I sent to Mr. Cantrel home Ultimate Jack:

Look the price we have to pay by Fedex :
Jack = $ 46.99 US / $ 56.99 CAD
Fedex US = $ 10.00 US / $ 14.95 CAD
Fedex International = $ 21.00 US / $ 26.63 CAD
------------------------------
Total = $ 77.99 US / $ 98.57 CAD

$ 98.57 CAD was the price which I should have paid.

I received another bill from Canada Customs they ask
$ 19.24 CAD extra for duties.
$ 98.57 CAD
$117.81 CAD for the jack...

We are not in a good position to make purchases US, for now, but when it is an interesting part for us, we go.

Good luck,
Attached Thumbnails
Ultimate Jack installation 1.jpg   Ultimate Jack installation 2.jpg  

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Old 12-03-2015, 10:30 AM   #22
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where can i get one of those jacks ? and can you pull it out the top.
Yes you can pull it out of the top. You have to jiggle it a bit to get it back in, as there is a detent in front of the outer tube so that the locking holes line up properly.
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Old 12-03-2015, 04:10 PM   #23
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Name: Martin
Trailer: 1993 CASITA 16SD
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If you're having to use a 3 1/4" drop to level your trailer on the back of a stock Ranger, your trailer is sitting mighty low. Its really doesn't sound like a jack issue or even a hitch issue as much as your Scamp doesn't have enough clearance. Raise the trailer and you can raise the hitch.

When I got my '93 Casita 16SD I could barely get it in and out of my driveway without scraping the Casita's rear bumper or the bottom of the stinger. That's no longer a problem since I changed the worn out axle and went to 15" tires.
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Old 12-03-2015, 04:28 PM   #24
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Originally Posted by CASITA BANANA View Post
If you're having to use a 3 1/4" drop to level your trailer on the back of a stock Ranger, your trailer is sitting mighty low. Its really doesn't sound like a jack issue or even a hitch issue as much as your Scamp doesn't have enough clearance. Raise the trailer and you can raise the hitch.

When I got my '93 Casita 16SD I could barely get it in and out of my driveway without scraping the Casita's rear bumper or the bottom of the stinger. That's no longer a problem since I changed the worn out axle and went to 15" tires.
I agree, and I've done the same with my '94 Casita and now my Bigfoot.
Both ended up slightly nose down with no tendency to sway.

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Old 12-03-2015, 04:56 PM   #25
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Quote:
Originally Posted by CASITA BANANA View Post
If you're having to use a 3 1/4" drop to level your trailer on the back of a stock Ranger, your trailer is sitting mighty low. Its really doesn't sound like a jack issue or even a hitch issue as much as your Scamp doesn't have enough clearance. Raise the trailer and you can raise the hitch.

When I got my '93 Casita 16SD I could barely get it in and out of my driveway without scraping the Casita's rear bumper or the bottom of the stinger. That's no longer a problem since I changed the worn out axle and went to 15" tires.
4X4 Ranger is 22 inches ball height without a drop , I need a 5 inch drop to have a very slight lower front end on the trailer [Surf- Side]
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Old 12-03-2015, 05:03 PM   #26
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I think that it would help if HappyScamper provided a side view of his Scamper hitched to his Ranger to give us a better idea of the problem. As well as a close-up of his Scamps wheel wells.....


Until then, it is a lot of guessing for all of us.
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Old 12-03-2015, 10:17 PM   #27
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Maybe just put skid wheels on to protect the hitch?
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Old 12-04-2015, 01:43 AM   #28
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Name: Peter
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The USA is bad for this problem as they use the Curbs,

Quote:
Originally Posted by HAPPYSCAMPER76 View Post
Hello,
We went camping in our Scamp for the first time recently. We towed the trailer about 10 hours down to the SoCal coast. It was a bit stressful at times pulling in and out of some gas stations, shopping centers, restaurants, etc., as sometimes I would grind the nut on the ball of the hitch on some of the steep ramps coming from those aforementioned places out to the street. The trailer looks to be mostly level with a slight slant forward. I went with a 3 1/4 inch drop hitch for a 2003 ford ranger 4x4 with stock size tires on a 15 inch rim.

My question is, do a lot of you have this same issue? I think the next size down in hitch drop is 2" which is somewhat the standard hitch. I am a bit worried that this would make me worry more about hitting the back end of the Scamp, rather than the hitch. Also, with the trailer slanted toward the back, wouldn't this be less than ideal for weight on the tongue, or would this not matter? I wish I had a photo to add, as this would probably help folks give me a better answer, but I do not have one showing the truck with trailer on level ground.
: for drainage ditches and they are all steep in going down and and coming back up. I Only by MH's that have that back slope and it has to slope at least 8" up but for some reason the one we have no does not have that slope it is only about 2" and is not enough. In my old Class B van extra long unit I put a Carry all on back which could carry no more than 500#'s including the weight of the unit. The best thing I did was install 4" swivel wheels on it and every time we hit it hit on the wheels lifting the unit up but no damage as the wheels let it move along with the truck.
The only saving grace for us in our MH is it has those big steel brackets on the back and they hit quite often no damage to us but grooves in the Pavement.
Maybe lifting the trailer up would help with wheels on the back of the trailer so if it hits they are the parts being hit and helping the trailer move along until back on flat ground again.
Stude
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