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Zach Johnson
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Zach Johnson's Discussions

Throttle vs boat speed
3 Replies

We have lots of posts here about assorted engines being employed on different boats, but we have little relative data to help an owner get the proper engine for their boat, in the conditions they're…Continue

Started this discussion. Last reply by Zach Johnson on Friday.

Tiki 30 mast measurements
12 Replies

In planning out my Tanenui build I see that to accomplish my goal of open, unobstructed deckspace I'll need to use the Tiki 30 rig. The 30's rig is listed as an alternate Tanenui wingsail…Continue

Started this discussion. Last reply by boatsmith Nov 13.

Tiki26 with Mana flavor
3 Replies

I'm pondering between a few of Wharram's sub-30' designs and while all have something I'm keen on, I keep flipping back and forth between the Tiki26 and the Mana. More to the point, I keep looking at…Continue

Started this discussion. Last reply by Rod McLaren Nov 9.

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Zach Johnson replied to Zach Johnson's discussion Throttle vs boat speed
"Good info. Seems like these even with lower SOGs, these little outboards are nearly maxed out. Bart, your info is especially relevant for me as I'll be building a Tanenui which isn't all too dissimilar from your T30. I'll be dealing…"
Friday
Bart Koop replied to Zach Johnson's discussion Throttle vs boat speed
"For my tiki 30,  i use a yamaha 9.9 high trust longshaft. On a lake it give's me 6 knots 3/4 throttle, 7 knots full throttle. with 25 knots wind from the front i go 4,5 knots full throttle. on a big lake (shallow with short, steep waves) i…"
Friday
Ian Bamsey replied to Zach Johnson's discussion Throttle vs boat speed
"Interesting question. On my Tiki 21, I'm using a Honda BF5. I use the boat in coastal waters where tide is a factor. Up and down the coast, making a passage, a 1 to 2knt tide makes all the difference and around headlands it can create over…"
Thursday
Zach Johnson posted a discussion

Throttle vs boat speed

We have lots of posts here about assorted engines being employed on different boats, but we have little relative data to help an owner get the proper engine for their boat, in the conditions they're likely to sail in. For example, a Tiki26 that navigates coastal rivers and associated tides is likely to have more engine than required for navigating an inland lake. So let's hear it: What engines are you using on what boat? What speeds do you achieve at what throttle and in what conditions…See More
Tuesday
boatsmith replied to Zach Johnson's discussion Tiki 30 mast measurements
"I don't like the design"
Nov 13
Zach Johnson replied to Zach Johnson's discussion Tiki 30 mast measurements
"Boatsmith, would you not use the wingsail again because of its design or because of its size on your boat?"
Nov 11
Budget Boater replied to Zach Johnson's discussion Tiki 30 mast measurements
"I think that most Wharram sailors consider that a positive benefit of the design. For light air performance I added an 8' pole connected to Beam 1, which was used for setting light air sails to keep the speed up. I do however prefer taller…"
Nov 11
boatsmith replied to Zach Johnson's discussion Tiki 30 mast measurements
"add a sprit. I personally won't use the gaff wingsail again. The stock T30 rig was in my opinion too small for the boat.  never once did we reef. several times in 35-40 apparent wind speed.  "
Nov 11
Rod McLaren replied to Zach Johnson's discussion Tiki26 with Mana flavor
"With luck, we may see a 'sail-off' next summer between the Mana and a Tiki 21. There is a Forum member who has expressed interest in joining the Elbow Run 2018 so if he joins us, and assuming I have completed my Mana build in time, we will…"
Nov 9
Zach Johnson replied to Zach Johnson's discussion Tiki 30 mast measurements
"Leaving the sails shaped as originally designed and simply shifting the mast position would do as you say for sure. While I won't be able to do anything about the deficiencies created with the jib's shortened foot, I'm planning to…"
Nov 9
boatsmith replied to Zach Johnson's discussion Tiki26 with Mana flavor
"My question would be which hull shape goes to weather better? Twould be nice for JWD to show us in a sail off."
Nov 9
boatsmith replied to Zach Johnson's discussion Tiki 30 mast measurements
"More beam and more sail are plus more room sounds like the path to true enchantment to me. If the Tanenui is well balanced on the original plans then moving the mast forward will move the center of effort forward as well. This would cause lee helm.…"
Nov 9
Zach Johnson replied to Zach Johnson's discussion Tiki 30 mast measurements
"It would sure be nice to go with the Tiki beams to get the extra deck space. That will be some serious room once the mast is up on beam 2. I'll get the homework done this week. I wish I could just just go straight to leaving it on the hook…"
Nov 8
Budget Boater replied to Zach Johnson's discussion Tiki 30 mast measurements
"The Tanenui and Tiki 30 have the same weight, and the Tanenui has a standard beam of 12'6" while the Tiki 30 has a beam of 16'4". As for the "marina math" I cannot help since I don't use marinas, so never…"
Nov 8
Zach Johnson replied to Zach Johnson's discussion Tiki 30 mast measurements
"It includes the detail for the standard Tanenui rig. So all seems to be well there. The confusion came from JWD's inclusion of the T30 rig they don't suggest using. It seems prudent for them to edit that drawing and remove the T30 rig if…"
Nov 8
Budget Boater replied to Zach Johnson's discussion Tiki 30 mast measurements
"So you paid for the upgrade, but it does not detail the rig dimensions or what is required for the beams to support it? If so, it sounds like JWD owes you some money back..."
Nov 8

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I want a Wharram, Just Looking
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Northern Alabama, USA
About me or us?
Engineer who had rather be trolling a line along a reef while under sail.

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