<div dir="ltr"><span style="font-size:12.8px">Lifting a sub of even modest weight off of a trailer using a rotating A frame will require a rather large counter weight on the tongue. I wouldn't trust the hitch alone to hold back that much torque in the wrong direction. I think a simpler solution would be to just attach large wheels to the sub ala Simon Lake's Argonaut. Then any standard twin axle car trailer with a winch would work for sub duty. This would probably be a good system for someone who owns multiple subs. No need to build (or register and insure) a custom trailer for every sub you build. Three large wheels on the sub could be locked for transport easier than dozens of rollers. You would still have trouble with launches from gently sloping,shallow, muddy shores though since the wheels might bog down. You'd have a hard time launching a sub using any method in those conditions though.</span><div class="gmail_extra"><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">-River J. Dolfi<div><br><div>412-997-2526</div><div><a href="mailto:rdolfi7@gmail.com" target="_blank">rdolfi7@gmail.com</a></div><div><a href="mailto:rwd5301@psu.edu" target="_blank">rwd5301@psu.edu</a></div></div></div></div>
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