[PSUBS-MAILIST] launch rollers

[James Frankland via Personal_Submersibles]

Hi Hank,

I was aware of the tilting issue.  The plan is to have reasonably long
ramps to minimise the tilt and also jack up the front of the trailer to
meet the angle.  That was why I was asking about hydraulic rams etc a week
or so ago.  In the end I think you suggested just jockey wheels which is
what im going to go for.   Well, that the idea but is always open to
suggestions.  Can you clarify your c channel tilting idea?
Im not sure what you mean.  Might be better?
ps: The ramps are going to be c channel anyway to stop the boat sliding off
sideways.





On 22 July 2014 13:08, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi James,
> I am worried about your set up with the rollers.  If I understand it, you
> will have a horizontal trailer deck with ramps on an angle to the ground.
> With that many rollers it will be dangerous to transition from the
> horizontal deck to the angled ramps.  When the sub rolls back, eventually
> it will be at the balance point and tilt to match the ramp angle.  At the
> point the sub will be on only two rollers.  If the two rollers happen to be
> at the transition point where the deck meets the ramps, the sub will turn
> violently and I mean violently.  It could be dangerous.  There are a
> few solutions, you can make a tilting track with C channel that tilts with
> the sub so all the wheels are in contact all the time.  Another solution is
> to use only four wheels, or best of all a tilt deck trailer.  I went with
> four large wheels on my cart for these reasons. With four wheels the sub is
> never at a tipping point.
> Hank
>
>
>   On Tuesday, July 22, 2014 5:34:36 AM, James Frankland via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi Hank,
>
> Yes, the idea is to make ramps that the sub can be winched down off the
> trailer.
> Regards
> James
>
>
> On 22 July 2014 02:48, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> James,
> Love the rollers, they look real good.  Are you going to have a tilting
> track that the rollers run in?
> Hank
>
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