Wharram Builders and Friends

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Allen Bosely
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  • Captain Cook, HI
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Year Narai MK V introduced

Looking through Sailorman newsletters to find out when the Narai MK IV was introduced and any information about the design aspects talked about when was announced/introduced, but not finding it…Continue

Started Sep 14, 2023

Tiki 38 aluminum masts use tabernacle & mast case same as wood mast?
2 Replies

When using aluminum masts on Tiki 38, is tabernacle and mast cast the same as when using wood masts?Or are aluminum masts stepped with metal base for masts?Actually would be for Narai MK IV with…Continue

Started this discussion. Last reply by Allen Bosely Jul 27, 2023.

Tangaroa MK IV Floor Width
2 Replies

What is the floor width of Tangaroa MK IV midship area?Cheers, AllenContinue

Started this discussion. Last reply by Allen Bosely Jul 5, 2023.

Tanenui lumber cut list in plans?
3 Replies

I have Tanenui Sail number 151 plans, but I’m not seeing a lumber cut list.Am I just not seeing it? Lol The study plans for the other boats have the lumber material list, but my study plan didn’t…Continue

Started this discussion. Last reply by Ian R Dec 25, 2020.

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Allen Bosely posted a discussion

Year Narai MK V introduced

Looking through Sailorman newsletters to find out when the Narai MK IV was introduced and any information about the design aspects talked about when was announced/introduced, but not finding it yet.Anyone know what year the Narai MK IV was introduced, would like to read what was said about it in Sailorman.  No special reason, just interested in the history of the Narai MK IV. Cheers, AllenSee More
Sep 14, 2023
Marc Raventós replied to Allen Bosely's discussion Tangaroa Mk IV & Raka Hull Beam?
"Hey Allen, Thanks for the reply. That's wider than I expected.. a beautiful design ! Cheers "
Aug 27, 2023
Allen Bosely replied to Allen Bosely's discussion Tangaroa Mk IV & Raka Hull Beam?
"Hi Mark, the plans show at midship (the widest) the width is 67-¾” not counting the bulwarks. Hight from deck to bottom of keel is approximately 63” . Cheers, Allen"
Aug 27, 2023
Marc Raventós replied to Allen Bosely's discussion Tangaroa Mk IV & Raka Hull Beam?
"Hey Allen, So what's the max width of each individual hull of the Tangaroa Mk IV ? I'm curious to see if 2 hulls could fit side by side in a 2.4m wide trailer.  Thanks in advance ! Marc "
Aug 26, 2023
Allen Bosely replied to Allen Bosely's discussion Tiki 38 aluminum masts use tabernacle & mast case same as wood mast?
"Thanks Ian, not looking for dimensions or specifics, mostly wanting to see how Tiki 38 aluminum masts are mounted. Guessing don’t use same mast tabernacle base as wooden masts. Cheers, Allen"
Jul 27, 2023
Ian R replied to Allen Bosely's discussion Tiki 38 aluminum masts use tabernacle & mast case same as wood mast?
"Sorry you got no replies about this: I can only give you info about my Tiki 31 alloy masts. There was no info on my  plans about alloy but I got some info off this site. I had a splined (fore and aft) baseplate made at the foot of the 127 dia.…"
Jul 27, 2023
Allen Bosely posted a discussion

Tiki 38 aluminum masts use tabernacle & mast case same as wood mast?

When using aluminum masts on Tiki 38, is tabernacle and mast cast the same as when using wood masts?Or are aluminum masts stepped with metal base for masts?Actually would be for Narai MK IV with aluminum masts, Tiki style beams & lashings. But figured Tiki 38 has more examples of aluminum masts built.Cheers, AllenSee More
Jul 16, 2023
Allen Bosely replied to Allen Bosely's discussion Tangaroa MK IV Floor Width
"Was wondering width of floor when floor is set at hight recommended in plans. Just curious if the floor width difference between Narai MK IV and Tangaroa MK IV when floors set at hight shown in plans. Not really important, just curious. :-)"
Jul 5, 2023
Brandon Gamble replied to Allen Bosely's discussion Tangaroa MK IV Floor Width
"This really depends on where you set the floor height as the hulls taper outward as you go up.(Every builder is different) Probably 16 to 20 inches? "
Jul 4, 2023
Allen Bosely posted a discussion

Tangaroa MK IV Floor Width

What is the floor width of Tangaroa MK IV midship area?Cheers, AllenSee More
Jun 19, 2023
Allen Bosely shared Ganz Daniel's discussion on Facebook
Jun 16, 2023
Allen Bosely shared kim whitmyre's discussion on Facebook
Jun 8, 2023
Derek Snyder replied to Allen Bosely's discussion Tangaroa Mk IV Beam with Tiki Style Beams
"Thanks Allen. I’ll DM you with more Tangaroa questions after the ‘friend request’ goes thru ;) Would love to know more on the mods."
Sep 10, 2022
Allen Bosely replied to Allen Bosely's discussion Tangaroa Mk IV Beam with Tiki Style Beams
"That’s one of my planned changes on Tangaroa Mk IV, can be done on Narai Mk IV also. Has a few advantages, no beam troughs mean less weight, simpler building, eliminates potential beam trough leaking. Gives about 12” more head room…"
Sep 9, 2022
Allen Bosely replied to Allen Bosely's discussion Tangaroa Mk IV Beam with Tiki Style Beams
"I just so happen to have Narai Mk IV plans with upgrade drawings also. I think they have the differences, info for Narai Mk1 & Mk II. Talked to Hanneke about few changes to the Tangaroa Mk IV and she agreed the proposed changes would be…"
Sep 9, 2022
Derek Snyder replied to Allen Bosely's discussion Tangaroa Mk IV Beam with Tiki Style Beams
"Thanks Allen :) I am mostly looking for more info on the differences between the Tangaroa MkIV, and various Naria’s. Am I correct in that the upgrade design shows I-beams that are lashed on top rather than through the hulls? This would make…"
Sep 9, 2022

Profile Information

I am:
A home builder, I want a Wharram
What boat (s) are you building or do you own?
Getting ready to build a Narai Mk IV
Country, City, and State?
Ocean Veiw, Big Island Hawaii
Looking to?
Learn about Wharram Cats and building a Nari Mk IV

Comment Wall (3 comments)

At 2:05pm on April 7, 2015, Richard Gordon David said…
Hi Allen, yes I'll be your friend Tacenui Mae is maybe the only built from scratch Tanenui/Tiki hybrid which Hanneke is referring it can be done. My Tanenui hulls have had their freeboard raised which in turn gives bigger wider internal volume and adds length, my boat is 29 feet or almost 9 metres in length. Her original builder grafted Tiki style fore / cabin tops/ after decks exactly mirroring a Tiki 30 he had made a heavy duty aluminium tube at the bows which supports a central wooden walk on gangway and bow anchor roller, a netting is attached to this alloy cross tube beam between hull decks this holds the anchor and coiled chain/rope. She had just two main GRP Tiki 26 beams which whilst technically strong enough almost one third of after hulls had no beam support the last owner engineered a major upgrade key to this was two additional wooden cross beams one in between the alloy bow beam and first GRP main beam this beam also supports the Tiki style alloy mast she has wing main sail, the other wooden beam is about 3 feet forward from the rudder posts Hanneke sent me drawings for replacing the beam lashings but I ignored this idea and went for ratchet straps they are cheap very strong and most importantly easily tightened (impossible with lashings) Many Tiki 30's have ratchet straps. In addition to the wooden beams the previous owner built a large between hulls below deck locker this is between first wooden beam and the mast bearing GRP beam it is very useful and still I gives 2 ft plus wave clearance it does'nt slam at all. Between GRP beam 2 and after wooden beam a helmsmans cockpit has been built this has a Cuddy to protect from spray and houses instruments and engine controls outboard motor is mounted in front of helmsmans cuddy and is protected by freestanding engine box which doubles as cockpit table. Half moon shaped blisters have been added to both cabin tops they give full standing headroom in each hull yet look unobtrusive she is a much admired boat, her beam by the way is 15 ft . The Tanenui classic hull construction is too heavy as a trailer sailer mine weighs just over 2 tons a Tiki 30 is probably half that. Also I wouldn't bother with rope lashings for rigging stays stainless steel bottlecrews are much easier to tension properly . Hope this helps good luck Richard David
At 4:09am on April 8, 2015, Richard Gordon David said…
Hi Allen, I don't have any photos yet but will try on this I pad next time I'm in Exmouth (about twenty miles away) I'm guessing that Tacenui Mae's freeboard has been raised by around 5 or 6 inches this has increased her length and internal hull width. There was a standard Tanenui nearby which nobody believes is the basis of Tacenui Mae as that looks very small in comparison although both share the very sweet hull line. Incidentally, mine is currently on a boatyard beach right next to a Tiki 31 mine is at least 8" taller in the hulls and looks the bigger boat certainly has much bigger internal volume in the hulls.I don't know the reason why Tiki's have such little freeboard amidships (perhaps, it was to economise on sheets of plywood needed) I think ratchet straps are an essential improvement as with taller hulls the stresses on lashings at sea is much more than Tiki range, it is impossible for one person to tighten AND tie off lashings the last owner removed the ratchet straps and replaced with lashings, believe me on the delivery trip it was a bit scary how much the entire boat flexed the lashings became very loose and when at sea impossible to attend too wheras with ratchet straps it's simple to adjust tension. They are a very fast boat mine will sail for hours at over 13 knots . Good luck Richard
At 12:59pm on June 20, 2015, Brandon Gamble said…
Hey friend :)

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