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Hendrik Agterkamp
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Stub mast position for crab claw rig on Hitia 17 or Tiki 21
5 Replies

What is the best position of the stub mast when using a crab claw rig on Hitai 17 or Tiki 21. Are there any guidelines ? Is it matter of weight balance ?It seems to me that the shorts sub by mast…Continue

Tags: claw, crab

Started this discussion. Last reply by Scott Veirs Jan 4, 2015.

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Latest Activity

Scott Veirs replied to Hendrik Agterkamp's discussion Stub mast position for crab claw rig on Hitia 17 or Tiki 21
"Hey Bill & Houston, I for one would be interested in photos if you have them.  We're testing out a few crab claw sails on a Hitia 17 in Seattle over the next month... Here's a 7 m^2 crab claw on a bipod mast: We tried the mast…"
Jan 4, 2015
Bill & Houston Barker replied to Hendrik Agterkamp's discussion Stub mast position for crab claw rig on Hitia 17 or Tiki 21
"Greetings, we sailed for two seasons with a Crab Claw rig on our Hitia 17. Tried on the front beam first which did not work so well. Found it to work much better right were the regular mast goes. We could jib on a dime but tacking was difficult…"
Nov 7, 2012
clif high replied to Hendrik Agterkamp's discussion Stub mast position for crab claw rig on Hitia 17 or Tiki 21
"i had engineered a crab claw for the tiki 21 with the crane/mast mounted on the forebeam with an 8 degree aft rake. This allowed me to move the crab pincer to the  very bow of each hull in turn on the appropriate tack. By being able to adjust…"
Sep 9, 2012
Hendrik Agterkamp replied to Hendrik Agterkamp's discussion Stub mast position for crab claw rig on Hitia 17 or Tiki 21
"Great link, thanks, really gave me an idea of what it will look like - lots to think about"
Sep 7, 2012
marc replied to Hendrik Agterkamp's discussion Stub mast position for crab claw rig on Hitia 17 or Tiki 21
"Hi Hendrik, please have a look at : http://www.multihull.de/story/st_panama1gb.htm  "
Sep 6, 2012
Hendrik Agterkamp replied to Don Hayes's discussion Crab Claw information in the group Crab Claw rig
"@Scott, I'm very interested to hear more about results of your experiments. My plan is to put a crab claw on a Hitia 17. Why crab claw: my requirement for sail rig is something that reefs fast and simple. I will be sailing mostly solo trolling…"
Sep 5, 2012
Hendrik Agterkamp joined wakataitea's group
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Crab Claw rig

please feel free to add pictures and any kind of info's to this crab claw group.
Sep 5, 2012
Hendrik Agterkamp posted a discussion

Stub mast position for crab claw rig on Hitia 17 or Tiki 21

What is the best position of the stub mast when using a crab claw rig on Hitai 17 or Tiki 21. Are there any guidelines ? Is it matter of weight balance ?It seems to me that the shorts sub by mast could be placed more forward, perhaps all the way on the front crossbeam.See More
Sep 4, 2012
Hendrik Agterkamp is now a member of Wharram Builders and Friends
Aug 31, 2012

Profile Information

I am:
A home builder, I want a Wharram
What boat (s) are you building or do you own?
Will start on a Hatia 17 build early next year.
Country, City, and State?
USA, Waikoloa, Hawaii
About me or us?
Avid blue water (extreme) SOT kayak fisherman.
Looking to?
Talk to forum members about how and what on boat building and use etc. Which boat is best for me , what sailing rig is more fit for fishing, etc.

Comment Wall (1 comment)

At 9:02pm on September 5, 2012, Kevin Hutchinson said…

To reduce the force on a crab claw you "rock" the sail down to a more horizontal position. This can be done in seconds without changing the sail area. However this reduces windward ability greatly! A reef point could be added to the sail but you would need to lower the rig to the deck to reef it. Not a big deel on a small boat.The crab claw will never be adequate to windward because the sail can't forms an airfoil shape. If you attached the foot of sail at the tack and clew only, windward ability improves slightly. I think if you made an upsidedown windsurfer sail using a wish bone boom that might work. You would still have the center of effort high up(bad idea for cats)....Kevin

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