Tried Coil Springs with inside airbags ?

[a.]

> Ok,When you say totally compressed,does that mean it went all the way down?
>
> Its really lame that nobody can attach a small photo for any post,I am on dozens of forums,mostly 8.2 litre Cad but this is very,very frustrating not being able to see what people are saying or doing without going to another link and fighting to see what you are talking about. Any way the webmaster can repair this trouble?
The webmaster restricted the file size of attachments to deliberately. There is limited drive space on the server.
If you want to see pictures in a post, you need to
1. Use the forum instead of email, and
2. The people posting need to follow the process worked out in this thread: http://gmc.mybirdfeeder.net/GMCforum/index.php?t=msg&goto=188306&rid=2083
(hint - log onto the forum to see it in action)

It produces the effect you are requesting. If the poster encloses the URL of the picture in "img" tags, and also includes the URL without the tags, forum users see the pictures in the post and email users can slog to the URL and see the photos.

If you can get adjusted to it, posting photos to the photo site yields the abilty to organize and preserve pictures at least as well as a bottomless forum server.
--
'73 23' Sequoia
UA (Upper Alabama)
"Sometimes 'free' is too expensive."

 

[sigmund frankenfelter]

> Ok,When you say totally compressed,does that mean it went all the way down?
>
> Its really lame that nobody can attach a small photo for any post,I am on dozens of
> forums,mostly 8.2 litre Cad but this is very,very frustrating not being able to see
> what people are saying or doing without going to another link and fighting to see
> what you are talking about.Any way the webmaster can repair this trouble?


Yes, all the way down. there was a 12 inch distance between the bogey mount holes. It did not reach equilibrium - meaning that the shock absorbers were out as far as they could go, and no downward or upward movement on the body could be done by hand. Perhaps I'm using the wrong spring. I went with a Moog front F350 heavy duty spring - 1759 pound load. Heaviest I could find.

If there is a better, heavier spring, I would be interested. Unfortunately, I have not been able to find any catalog listing spring length, diameter and load - all measurements I need to do this.

 

[sigmund frankenfelter]

> Here's my spring data from spending entirely too much time
> working on my 1975 Glenbrook.
>
> I measured the distance between the top rear tire and wheel well.
> I then made a spread sheet to calculate the spring force as
> the wheel goes from max height to lowest:
>
> 1975 Glenbrook 26 foot
>
> 3900LBS Coach Weight on 2 Tandem Wheels
>
> Boggie Pin Air Bag Wheel Well Spring Force
> to Ground Mount Dist Clearance
> inches inches inches pounds
> 15.00 17.66 9.50 2977
> 14.75 17.33 9.25 2954
> 14.50 17.00 9.00 2931
> 14.25 16.67 8.75 2909
> 14.00 16.33 8.50 2887
> 13.75 15.99 8.25 2866
> 13.50 15.65 8.00 2845
> 13.25 15.31 7.75 2824
> 13.00 14.97 7.50 2803
> 12.75 14.63 7.25 2783
> 12.50 14.28 7.00 2763
> 12.25 13.94 6.75 2743
> 12.00 13.60 6.50 2724
> 11.75 13.25 6.25 2705
> 11.50 12.91 6.00 2686
> 11.25 12.56 5.75 2667
> 11.00 12.22 5.50 2649
> 10.75 11.87 5.25 2631
> 10.50 11.53 5.00 2613
> 10.25 11.19 4.75 2595
> 10.00 10.84 4.50 2578
> 9.75 10.50 4.25 2561
> 9.50 10.16 4.00 2544
> 9.25 9.83 3.75 2527
> 9.00 9.49 3.50 2510
> 8.75 9.16 3.25 2494
> 8.50 8.83 3.00 2478
> 8.25 8.50 2.75 2462
> 8.00 8.17 2.50 2447
> 7.75 7.84 2.25 2431
> 7.50 7.52 2.00 2416

I like numbers for this project. What I need, but could you explain exactly what the above numbers represent? For example, call me crazy, but no matter what load is on the springs, wouldn't the weight at the wheels be the same?

 

[bill wevers]

Francois,
The weight at the wheel is divided by the suspension rate, to
get the weight on the spring (force). In this case the bogie
arm leverage (suspension rate) is ~70% in mid-travel.
Each wheel supports 1950 pounds.

So the force on one end of the spring is 1950 / 0.7 = 2785 pounds.
This force reacts in the opposite direction, pushing on the
opposing bogie arm. So the spring only needs 2785 pounds
to hold up 3900 pounds of motorhome.

Regards,
Bill

 

[bill wevers]

Here are some Raybestos spring part numbers.
The spring rated at 1759lbs load will have 950lbs more load
when installed on the motorhome. So it will compress smaller.
The spring with 19.28" free length will compress down to 14.5", or there about, depending on the load in your motorhome.

Raybestos*Springs*?*constant rate springs
Part#***ID----BarDiameter----InstallHeight--Spring*Rate-------Free*Length
5871071-4.03"---.812"--------------16"---------570Lbs/in---=----18.53"
5871116-4.03"---.812"--------------15"---------570Lbs/in------- 17.75"
5871125-4.03"---.828"--------------16"---------615Lbs/in------- 19.28"
5871003-4.00"---.690?--------------13?---------350Lbs/in------- 18.25?
5871002-4.00"---.672?--------------13?---------317Lbs/in------- 17.5?
5871111-4.00"---.765"--------------13.75"------450Lbs/in------- 19?
5871004-4.00"---.740?--------------12.75?------392Lbs/in------- 18.38?
5871001-4.00"---.640?--------------13.00"------217Lbs/in------- 16.44?

Regards,
Bill