Re: Van Loan designs - supplementary message
- --- In email@example.com, "Paul Stewart-Day" <stewartday@h...>
> Hello again. I didn't receive any responses from Van Loan designbook
> users, so I suspect that noone in the junkrig group, other than
> myself, sails or has sailed a boat with his junk rig design. His
> is mentioned in a couple of junk websites and it is available froma
> few online sources. It has been updated over the years. If anyoneVan
> wants to obtain a copy let me know and I will pass on the website
> addresses of the bookshops.
> Since I sent the first message it has occured to me that I had
> forgotten that I had made a couple of modifications/additions to
> Loan's design: I made the top panel of the sail a little morepeaked
> than his, to assist in windward ability, but not as much as someis
> designers' top panel, to avoid sag. In order to move the centre of
> effort of the sail fore and aft I added a running parrel ( a rope
> that loops from the forward end of the battens around the mast and
> tightened to pull the sail aft a little, and let off to do thenot
> Perhaps noone is interested in Van Loan stuff in the junkrig group,
> or maybe noone is interested in single sail junk rigs. Let me know
> one way or the other so I can skulk off or not. By the way, I am
> trying to convince anyone of the benefits or othewise of anydesigner
> or design approach, merely exchange ideas.Hiya Paul,
> Regards, Paul Stewart-Day
I've ordered the Van Loan book. Meanwhile, trying to follow the
thread of these discussions is sort of like eavesdropping on a
conversation in the house next door.
How does Van Loan differ from Hasler? ALBATROSS is going to be a
single sail rig, and running parrels are standard? Hasler stuff.
There is a very fine line between "hobby" and "mental illness."
Follow my progress as I build a 26' Junk.
Come to TheMadMac's Nautical Follies.
See Albatross' Adventure http://www.nauticalfollies.com
Latest Update http://www.nauticalfollies.com/summer2000.htm
- Dear Alan,
I'll try to respond to your queries about the differences between Van
Loan and Hasler designs and running parrels in particular. Please
note though that I am no expert on Hasler, and the Van Loan book I
used when I converted my boat is an early 1980's edition.
-Van Loan's top panels appear to be much less peaked than Hasler's.
-The aft ends of the battens on my boat, following Van Loan's advice,
are mostly directly above each other. This, along with the sheet
being rove through blocks as high up and as far to the stern as
possible, has prevented a sheetlet from ever being entangled with a
(lower) batten or otherwise becoming stuck on the wrong side of the
sail after changing tack. (I bolted a frame across the pushpit (stern
rail), to which I attached the blocks for the sheet.) While I am not
sure if users of Hasler sails have had problems with sheetlets
getting tangled up, I have certainly read of several cases of junk
rigged boats with the problem.
-All my battens have sheetlets attached, as per Van Loan's advice.
The yard and the boom do not have sheetlets, also following his
advice. Photographs of Hasler sails, that I have seen, show the
uppermost batten without any sheetlet. It may well be that, because
the Hasler top panel is much more peaked than the top panel on my
sail, attaching a sheetlet to it would lead to the tangling problem
-I have loaned Van Loan's book to a friend, so someone might have to
set me straight, but, I don't recall him suggesting the use of
running parrels. He did, however, recommend that the parrels at each
batten be temporarily attached until sailing trials confirmed the
correct average balance point for the subsequent permanent attachment
of the parrels. His book concentrated on two masted rigs, however,
and when using two sails you can move the overall centre of effort
fore and aft by altering the amount of sail on one of them. What I am
getting at is that, on a single masted junk rig, the only way that I
know of to move the centre of effort to and fro is with a running
parrel and relatively long parrels which allow for fore and aft
movement. (As I am still intermittently experimenting with the the
setting of the rig to improve the windward ability of the rig, I am
not sure if the running parrel, is really of any practical use or
Regards, Paul. (PS: I wish I could have been more definite in my
responses, but I think this junk rig stuff is more of an art than a
science, at least for the time being......which reminds me about what
you wrote about hobbies and mental illness!!!P.)
> Hiya Paul,
> I've ordered the Van Loan book. Meanwhile, trying to follow the
> thread of these discussions is sort of like eavesdropping on a
> conversation in the house next door.
> How does Van Loan differ from Hasler? ALBATROSS is going to be a
> single sail rig, and running parrels are standard? Hasler stuff.
> There is a very fine line between "hobby" and "mental illness."
> Follow my progress as I build a 26' Junk.
> Come to TheMadMac's Nautical Follies.
> See Albatross' Adventure http://www.nauticalfollies.com
> Latest Update http://www.nauticalfollies.com/summer2000.htm