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HelicopterOff Topics › Mechanical Engineers .... Cargo Trailer Design .... Weight Load / Springs
06-06-2010 03:14 PM  7 years agoPost 21
Ace Dude

rrProfessor

USA

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Girard, what was the final outcome?

How do you like the Mini Wagon for hauling your heli stuff? I've been interested in a small cargo trailer for some time and was thinking the Mini Wagon would be a good size choice for hauling helis.

  

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06-06-2010 05:05 PM  7 years agoPost 22
Inspector Fuzz

rrKey Veteran

NLA

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Acetylene torch?

Have you thought taking off the suspension and using a torch to get the metal red/orange hot? If you are able to anneal the metal somewhat, you may be able to take some of the spring out of it and soften the ride.

Over the years, I have used a MAP torch to anneal (soften) large music wire so that it can be bent without breaking. After bending, I heat back to red/orange hot and quench with 40w oil. Use a small amount of oil, in case it catches on fire.

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06-06-2010 06:16 PM  7 years agoPost 23
junkpilot

rrVeteran

Alamogordo N.M.

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Zero load trailer

Girard;
First of all did you ever expect to see this much response to this question?
Have you considered eliminate the springs altogather, Add trailing arms to control the axle and Air shocks to handle the load (infinatly adjustable all the way to no spring at all)
Where in Tucson do you fly? Since you're asking about trailers I assume you fly Nitro. If you haven't already tried them give TRCC a shot on Valencia just east of Houghton,More sky than anywhere else you've flown.
Junkpilot

When you fly JUNK it's hard to tell when you've crashed!

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06-06-2010 09:47 PM  7 years agoPost 24
Girard Ibanez

rrVeteran

Tucson, Arizona (formally from Guam)

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Girard, what was the final outcome?

How do you like the Mini Wagon for hauling your heli stuff? I've been interested in a small cargo trailer for some time and was thinking the Mini Wagon would be a good size choice for hauling helis.

Ace Dude,

It's ok for helis and just right for 40 size airplanes. Any plane larger would not fit. The 4 x 6 is on the tight side space wise, 5 x 8 would be just perfect. But 640 lbs for the mini wagnon verses 820 lbs for the 6 x 8 and my Honda Civic max GVW is 1000 lbs.

The cargo suspension is stiff and the RC gets a really rough ride. Max GVW is 2200 lbs for most trailer and to have a smooth ride the cargo weight must be at it's max load. If you decide to order a new cargo trailer request for a lighter suspension base on your max RC weight.

I like the trailer other than the rough suspension ride that my RCs have to endure. At times I wish my little Honda had a higher GVW that way I could get the 5 x 8 cargo trailer.

As of now I am debating to spend the $300 for torfex or spend $150 for spring suspension and axle. Plus I have to weld the eye and brackets for the leaf. Then if I need to carry more load, I just change the springs at a cost of $30.00 per pair.


Team Thunder Tiger
since 6/2005 to 12/2014

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06-06-2010 09:52 PM  7 years agoPost 25
Girard Ibanez

rrVeteran

Tucson, Arizona (formally from Guam)

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Acetylene torch?

Have you thought taking off the suspension and using a torch to get the metal red/orange hot? If you are able to anneal the metal somewhat, you may be able to take some of the spring out of it and soften the ride.
I have torflex suspension axle. No springs. I wish I did have the spring suspension cause it's only $15.00 per leaf as compared to a 1200lb direct bolt on torflex axle which cost $300.00.

I still debating if I am going to change the entire axle and suspension to leaf or get the 1200 lb torflex axle.


Team Thunder Tiger
since 6/2005 to 12/2014

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06-06-2010 10:05 PM  7 years agoPost 26
Girard Ibanez

rrVeteran

Tucson, Arizona (formally from Guam)

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junkpilot
First of all did you ever expect to see this much response to this question?
Not sure but any response is welcome and better than none. I don't just rely on RR for my research to my topic. But the information I received and the solution to the problem will benefit not just me but all.
Have you considered eliminate the springs altogather,
These axles on the mini wagon are torflex suspension. No springs. The cost of a lighter torflex suspension is 15 times the cost to change out leaf springs. $30.00 for a pair of 1500 lbs springs.
Add trailing arms to control the axle and Air shocks to handle the load (infinatly adjustable all the way to no spring at all.
Trailer suspension are quite more complicated to design in order to achieve the smooth ride and stability. Not to mention the natural frequency of the tow vehicle and the trailer.
Where in Tucson do you fly?
I fly all over Tucson, TRCC, SAM's, Catalina, & Out Law field. You see, I have a Honda Civic which really doesn't have the room for RC cargo and passengers. If this vehicle had a 60/40 rear seat and able to fit a scale heli then I wouldn't need a trailer.


Team Thunder Tiger
since 6/2005 to 12/2014

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07-26-2010 03:08 AM  7 years agoPost 27
Ace Dude

rrProfessor

USA

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Hi Girard, check this out, shock absorption in the mounting rack.

http://www.jlproducts.net/ProductEasyRider.html

http://www.jlproducts.net/ProductEasyRiderWall.html

http://www.jlproducts.net/ProductEasyRiderWing.html

It might be possible to do something similar for your helis.

  

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07-26-2010 03:33 AM  7 years agoPost 28
MagicFingers

rrApprentice

PH, Mi USA

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Try Weight

Have you tried adding weight? I saw someone suggested this, said
something about sandbags, if you try different amounts and
determine how much you need, then add that weight with
a steel floor plate instead of sandbags, bricks, old car parts.
Less work for you too do than modifing trailer.

Each one, teach one

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07-26-2010 03:51 AM  7 years agoPost 29
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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Good looking plank support product line. Bookmarked.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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07-26-2010 06:28 AM  7 years agoPost 30
nitro fun

rrApprentice

Oc ca

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know what you might be better off building a box or platform for all your stuff and build a suspension for the box that rides in the trailer...

you could use soft foam blocks on the corners of a piece of plywood that your stuff straps too, to take out the jolts.. make a suspension for the weight of your things... easy to do..

you could get a piece of plywood and some foam for $40
a lot more easy then trying to make a trailer ride like a caddy..

to make that trailer ride soft then you need to by some coil overs tuned soft, and coils for the weight and make it a ladder bar suspension to make it ride like a pillow....

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07-26-2010 07:09 AM  7 years agoPost 31
Girard Ibanez

rrVeteran

Tucson, Arizona (formally from Guam)

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http://www.jlproducts.net/
Yeah great site .... and ideas.

Thanks for the link.


Team Thunder Tiger
since 6/2005 to 12/2014

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07-26-2010 11:46 AM  7 years agoPost 32
PGSigns

rrNovice

Hayes Virginia USA

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May be a simpler approach. Most trailers have a trailer tire on them with a stiff side wall. With the light load a standard car radial would be a better choice and run 35 psi air pressure. You can test this buy just lowering the tire pressure on the ones you have by 5 psi and see if it makes a difference.
Jimmy

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07-26-2010 01:57 PM  7 years agoPost 33
Girard Ibanez

rrVeteran

Tucson, Arizona (formally from Guam)

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I tried every approach, lowered psi to 10 psi, added cargo weight but that put a strain on the tow vehicle and took up cargo space. My only cheap alternative is to get rid of the trailer or change the suspension to a leaf vice torflex.

Thanks guys for your input and thoughts.


Team Thunder Tiger
since 6/2005 to 12/2014

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07-26-2010 08:30 PM  7 years agoPost 34
AirWolfRC

rrProfessor

42½ N, 83½ W

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You can lighten up leaf springs by removing some of the shorter leafs.
Add shocks and you should be all set.

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HelicopterOff Topics › Mechanical Engineers .... Cargo Trailer Design .... Weight Load / Springs
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