Graham,

Assuming you have a 15 gallon water tank mounted at the aft end of the V-berths, filling it would add ~125 lbs.  This additional weight would be located at about the front end of the bunks on the trailer.  Because the weight is not located right on the end of the tongue, you will not see the full 125 lbs as additional tongue weight.  On S/V Dynamic Equilibrium and my Lil Dude trailer, filling the water tank adds about 48 lbs of tongue weight.  The rest of the 125 lbs is loaded onto the trailer wheels because of the location of the water tank.  If the tongue weight situation on your trailer is causing marginal stability; this extra 48 lbs may help.  It certainly won’t hurt.

Roger Pihlaja
S/V Dynamic Equilibrium 

Sent from my iPhone

> On May 20, 2021, at 4:59 PM, Rick Lange <sloopblueheron at gmail.com> wrote:
> 
> ?Graham,
> 
> Fill your water tank.
> 
> Regards,
> 
> Rick Lange
> 
> 
>> On Thu, May 20, 2021 at 4:54 PM ROGER PIHLAJA <roger_pihlaja at msn.com> wrote:
>> 
>> Graham,
>> 
>> Whatever the reference point or the measurement, the fact that your tongue
>> weight is too low tells you everything you need to know.  If you don’t want
>> to just live with it, your options are: move the single axle backward on
>> the trailer, add a 2nd axle behind the 1st, move the boat forward on the
>> trailer, or add weight to the tongue.
>> 
>> Roger Pihlaja
>> S/V Dynamic Equilibrium
>> 
>> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
>> Windows 10
>> 
>> From: Graham Stewart<mailto:gstewart8 at cogeco.ca>
>> Sent: Thursday, May 20, 2021 12:50 PM
>> To: 'The Rhodes 22 Email List'<mailto:rhodes22-list at rhodes22.org>
>> Subject: Re: [Rhodes22-list] Axle locattion
>> 
>> Sorry for the confusion. Because all of the other dimensions matched the
>> drawing I used the distance from the axle to the back because it was the
>> easiest measurement forgetting that others might have a different
>> structure.
>> 
>> The distance between the center of the axle and the point where the
>> extension enters the trailer is 165" while that distance on the drawing is
>> 172"
>> 
>> Graham Stewart
>> gstewart8 at cogeco.ca
>> 
>> 
>> 
>> 
>> 
>> 
>> -----Original Message-----
>> From: Rhodes22-list [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf
>> Of
>> Lowe, Rob
>> Sent: Thursday, May 20, 2021 12:33 PM
>> To: The Rhodes 22 Email List
>> Subject: Re: [Rhodes22-list] Axle locattion
>> 
>> I agree with Todd that the reference point should be the center of the ball
>> socket.  That's where the tongue weight is measure and where the towing
>> force is applied. - Rob
>> 
>> 
>> ________________________________
>> From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> on behalf of Todd
>> Tavares <tavares0947 at gmail.com>
>> Sent: Thursday, May 20, 2021 11:11 AM
>> To: The Rhodes 22 Email List <rhodes22-list at rhodes22.org>
>> Subject: Re: [Rhodes22-list] Axle locattion
>> 
>> By looking at these old drawings, I guess the datum point/benchmark really
>> should have been the center of the ball socket, which would have better
>> standardized the tongue weight (and balance). That would have to assume the
>> coupler and extension lengths were somewhat uniform.
>> 
>> Measuring the axle position from the rear of the trailer frame or the rear
>> bunk support is not the best reference.
>> Also, the angles of the bunks are a little off (I was never good at trig).
>> Thankfully my carpenter's calculator has a rise over run function. The
>> angles for the bunks are closer to 22.5° in the rear and 37° in the front
>> (from horizontal).
>> 
>> I seemed to remember there was approximately a 6" difference in axle
>> positions between owners' trailers, but most reported the more rearward
>> dimension so I changed the drawing. There may be early drawings of the
>> trailer in the archives before I edited the drawing which show the forward
>> measurements..but I do not know.
>> 
>> Todd T.
>> 
>>> On Thu, May 20, 2021, 10:46 AM Cary Tolbert <retiredtoby at gmail.com> wrote:
>>> 
>>> Graham, my boat is an '86 and the trailer that came with the boat is a
>>> Triad.. Therefore I must assume the trailer is an 86 as well. I just
>>> measured from the end of the trailer to the center of the axle and it is
>> ,
>>> DRUM ROLL  . . . . . . . . . 75 1/2 inch. Sorry to add to the confusion..
>>> My front end measurements may also be off. I had the extension bar
>> replaced
>>> and last year added a braking system which added to the length of the
>>> extension with a brake actuator.  Mike is the second generation in the
>>> trailer company and I am sure the trailer has evolved over the years.
>> You
>>> know that Stan is always tinkering with something. I think my trailer was
>>> manufactured in Connecticut . The newer trailers are made in NC.
>>> 
>>> Best of luck
>>> Cary
>>> 
>>> On Thu, May 20, 2021 at 9:33 AM Graham Stewart <gstewart8 at cogeco.ca>
>>> wrote:
>>> 
>>>> I just measured the location of my axle and compared it to the drawings
>>>> prepared by Todd and found that my axle is 7" forward of what the
>>> drawings
>>>> specify. That strikes me as a pretty significant difference. I am
>>> wondering
>>>> if the others who have found it impossible to get their boats far
>> enough
>>>> forward might also measure the distance between the back of their
>> trailer
>>>> to the center of the axle to see if this is the reason for the
>>> difficulty.
>>>> The drawing stipulates that this distance should be 70" but mine is
>> 77".
>>>> 
>>>> Does anyone know whether this dimension changed at some time between
>>> older
>>>> and newer iterations of the boat?
>>>> 
>>>> 
>>>> Graham Stewart
>>>> Agile, Rodes 22, 1976
>>>> Kingston Ontario
>>>> 
>>>> 
>>>> 
>>> 
>> 
>>