Grumman 2 Trailer Balance

Ask questions about Harbor Freight trailers, or questions about building your own...

Grumman 2 Trailer Balance

Postby DWT77 » Wed Aug 17, 2016 7:29 pm

I have read through various threads and checked out the balance spreadsheet but just wanted to get some verification. I am planning on building a 5x5x10 Grumman 2 teardrop. The plans have the body of the trailer at 106" but my overall length will be 120". From what I have read and entered into the spreadsheet pretty much the 40/60 rule is the way to go.

My question is since the trailer body is 106" but the teardrop extends to 120" do I calculate any of the 14" difference into the balance of the trailer since that weight will still be there or do I strictly just worry about the trailer body?

For example

106" at 40% is 42.4" to the center of the wheel

120" at 40% is 48" to the center of the wheel

Thanks in advance for any input

Wayne
User avatar
DWT77
Teardrop Master
 
Posts: 159
Images: 169
Joined: Thu Apr 07, 2016 5:52 pm
Location: Oklahoma

Re: Grumman 2 Trailer Balance

Postby kayakdlk » Wed Aug 17, 2016 7:55 pm

When I did my trailer balance. I included 1/2 of my body overhang on the front in the Body length, (so my body extends 10 " over front frame so I included 5" 10' + 5" = 125").

I included my tongue box in my Hitch center from rear (2' tongue box + 4' tongue sticking out in front of tongue box = 6' . Since my tongue box curved back to the frame under the overhand I use 120" + 24" + 48" = 192"

I estimated my weights in tongue box, galley and interior shelf and used the dimension to the center of these areas plus estimated weight in the extra weight section.

When all said and done after I loaded my teardrop the tongue weight came very close the the spreadsheet.

Dan
User avatar
kayakdlk
Platinum Donating Member
 
Posts: 305
Images: 389
Joined: Wed Jun 27, 2012 9:02 pm
Location: Foothills of Colorado

Re: Grumman 2 Trailer Balance

Postby DWT77 » Wed Aug 17, 2016 8:50 pm

kayakdlk wrote:When I did my trailer balance. I included 1/2 of my body overhang on the front in the Body length, (so my body extends 10 " over front frame so I included 5" 10' + 5" = 125").

I included my tongue box in my Hitch center from rear (2' tongue box + 4' tongue sticking out in front of tongue box = 6' . Since my tongue box curved back to the frame under the overhand I use 120" + 24" + 48" = 192"

I estimated my weights in tongue box, galley and interior shelf and used the dimension to the center of these areas plus estimated weight in the extra weight section.

When all said and done after I loaded my teardrop the tongue weight came very close the the spreadsheet.

Dan



Awesome thanks!
User avatar
DWT77
Teardrop Master
 
Posts: 159
Images: 169
Joined: Thu Apr 07, 2016 5:52 pm
Location: Oklahoma
Top

Re: Grumman 2 Trailer Balance

Postby DWT77 » Thu Aug 18, 2016 9:24 am

kayakdlk wrote:When I did my trailer balance. I included 1/2 of my body overhang on the front in the Body length, (so my body extends 10 " over front frame so I included 5" 10' + 5" = 125").

I included my tongue box in my Hitch center from rear (2' tongue box + 4' tongue sticking out in front of tongue box = 6' . Since my tongue box curved back to the frame under the overhand I use 120" + 24" + 48" = 192"

I estimated my weights in tongue box, galley and interior shelf and used the dimension to the center of these areas plus estimated weight in the extra weight section.

When all said and done after I loaded my teardrop the tongue weight came very close the the spreadsheet.

Dan



Dan, do you find the 192" is to long for the Jeep? I will be towing with a Jeep as well.
User avatar
DWT77
Teardrop Master
 
Posts: 159
Images: 169
Joined: Thu Apr 07, 2016 5:52 pm
Location: Oklahoma
Top

Re: Grumman 2 Trailer Balance

Postby kayakdlk » Mon Aug 29, 2016 5:27 am

No problems with length
Dan
User avatar
kayakdlk
Platinum Donating Member
 
Posts: 305
Images: 389
Joined: Wed Jun 27, 2012 9:02 pm
Location: Foothills of Colorado
Top


Return to Trailer and Chassis Secrets

Who is online

Users browsing this forum: No registered users and 2 guests