[Rhodes22-list] boom hitting back stays

[ROGER PIHLAJA]

Jessie,



I don’t have the inner mast furling option on S/V Dynamic Equilibrium.  So, the height adjusting mechanism for my boom is different than yours.  But, can’t you pull the pin on the boom gooseneck car and drop the boom a couple of inches for sailing?  That should make your boom/backstay interference issue go away.  Then, as part of your pop top raising procedure, raise the boom 1st, then raise the aft end of the pop top into position, and then lift the pop top car into position.



When my boom is in the upper position, I have ~1” of clearance between the pop top and the bottom of the boom at the closest point.



Roger Pihlaja

S/V Dynamic Equilibrium



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________________________________
From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> on behalf of Jesse Shumaker <jesse.laten.shumaker at gmail.com>
Sent: Tuesday, July 30, 2019 9:40:49 PM
To: rhodes22-list at rhodes22.org <rhodes22-list at rhodes22.org>
Subject: Re: [Rhodes22-list] boom hitting back stays

Here are some additional measurements (see photographs below):
- 3.5" between the bottom of the boom and the top of the pop top
- 33" from the top of the deck to the bottom of the boom
- 29.25 from the top of the deck to the center of the pin hole on the mast
for the higher boom setting
- 27 3/8" from the top of the deck to the center of the pin hole on the mast
for the pop top car
- 9.25" from the top of the deck to the center of the pin hole on the mast
for the lower boom setting
- 1" between the bottom of the black plastic gooseneck block and the top of
the car that attaches to the pop top (when the pop top is raised)
- around 73" from the floor of the cockpit (not the drain) to the bottom of
the boom when the boom is roughly horizontal. I would need to re-measure
that using a level for verification when the boat is flat on the water.

<http://rhodes-22.1065344.n5.nabble.com/file/t907/BoomToPoptopClearance.jpg>
<http://rhodes-22.1065344.n5.nabble.com/file/t907/BoomToPoptopMeasurement.jpg>
<http://rhodes-22.1065344.n5.nabble.com/file/t907/between_cars.jpg>
<http://rhodes-22.1065344.n5.nabble.com/file/t907/deckToBoomOnHighSetting.jpg>
<http://rhodes-22.1065344.n5.nabble.com/file/t907/BoomCarHighSettingPinHeight.jpg>
<http://rhodes-22.1065344.n5.nabble.com/file/t907/lowerBoomHeight.jpg>
<http://rhodes-22.1065344.n5.nabble.com/file/t907/poptopCarPinHeight.jpg>
<http://rhodes-22.1065344.n5.nabble.com/file/t907/BoomHeightFromCockpitFloor.jpg>

I am curious if other R22s have the same measurements.

I agree that lowering the boom a bit would address the issue.  It seem like
I could add another hole in the mast for the pin from the boom car about an
inch lower (I'm nervous about drilling into the mast).  Now that I am
writing this, it occurrs to me that I could do a low risk test of that
theory by raising the pop top, pulling the pin from the upper setting and
lowering the boom car to be right on top of the pop top car (even though the
boom car would not have clicked in).  I wouldn't sail without the boom car
pin set, but I could try it at the dock to see how much difference that
makes.

Regarding the topping lift, it sounds like I could go with some lighter line
and adjust the attachment to use a small snap shackle to make it protrude
less than the carabiner.  However, that only addresses the light wind
scenario or when the topping lift is still on.  When under medium to heavy
wind, it is my understanding that a topping lift is not needed, but the
power in the main keeps the boom up in that case.

Side note: I'll rerun the backstay tensioner lines so they are not crossed.
It was a bit of sloppy work on my part for the initial rigging.

Thanks for the continued feedback!




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