Sunday, October 8, 2006
Sailing Model, AMYA Star45 Class | Masts
3.1 Masts shall be made of wood or aluminum. Swing rigs, rotating and permanently bent masts are prohibited.
3.2 Masts shall not exceed 3/4 inches square when measured at the thickest point of the mast. Maximum mast height shall be 70" when measured from the deck, inclusive of the crane. Rotating wind indicators and burgee staffs are not included provided the backstay is not attached to them in order to circumvent the 70" maximum mast height specification.
Typical Slotted Aluminum Masts for model sail boat
photo's courtesy of "Larry Ludwig" at www.LudwigRCYachts.com, Ludwig Mfg.
Sailing Model, AMYA Star45 Class | Booms
AMYA Star 45 Class Rules, 2006, Boom
4.0 BOOMS:
4.1 The main boom and jib club shall not exceed 5/8" when measured at the thickest point. Booms and jib clubs shall be constructed of wood, aluminum and/or fiberglass.
Some typical Fittings for sailing model
photo's courtesy of "Larry Ludwig" at www.LudwigRCYachts.com, Ludwig Mfg.
==
A simple and light weight plywood strut made from scrap 1/32 or 1/16 ply.
A sample of one builder's standing rigging fittings bill of materials
Sources:
http://gbmy.com/
http://www.worthmarine.com/
Main Boom kit #100L
Jib boom kit #102
Gooseneck/kicking strap #112
Head fitting #120
Turnbuckle (2 pk) #260 Need 4 total
Tangs (4 pk) #282 4 is all you need
Bowsies(10 pk) #199
KDH single block #250 Two each
Sheet Hooks (20 pk) #280
Of course there�s many things that can be substituted.
Instead of wooden or arrow shaft booms, airplane clips instead of the turnbuckles and so on.
From: "Robert Gonzalez"
Subject: Re: Rig Parts for Star 45
Date: Tuesday, June 05, 2001 1:17 PM
I ordered both size head cranes - I think the smaller one is ok, but I'm not
sure. Woody has one and is bent more at 90 degrees since according to the rules
the crane is included in the 70" mast height.
I also ordered the 1/2" mast head and foot inserts. They don't fit the new masts without being sanded down some.
I wasn't sure what I wanted to do for an adjustable foot. I ordered the Sail Etc
deck track and adjustable mount. Mine has popped out on Woody more than once.
Don (at Great Basin) doesn't offer many choices for these parts.
I need some more Pekabe fairleads if I run the rigging under the deck and if not
then Woody has three blocks on deck - using the bungee method.
I got the side stay racks this time and the jib rack - not sure I'll use them or
not.
Quick release turnbuckles are nice. At $10 ea - they're kind of high dollar
but easy to use. Don>>the KDH quick release turnbuckles are 2 to a package for 10.90.
http://gbmy.com/
http://www.worthmarine.com/
Main Boom kit #100L
Jib boom kit #102
Gooseneck/kicking strap #112
Head fitting #120
Turnbuckle (2 pk) #260 Need 4 total
Tangs (4 pk) #282 4 is all you need
Bowsies(10 pk) #199
KDH single block #250 Two each
Sheet Hooks (20 pk) #280
Of course there�s many things that can be substituted.
Instead of wooden or arrow shaft booms, airplane clips instead of the turnbuckles and so on.
From: "Robert Gonzalez"
Subject: Re: Rig Parts for Star 45
Date: Tuesday, June 05, 2001 1:17 PM
I ordered both size head cranes - I think the smaller one is ok, but I'm not
sure. Woody has one and is bent more at 90 degrees since according to the rules
the crane is included in the 70" mast height.
I also ordered the 1/2" mast head and foot inserts. They don't fit the new masts without being sanded down some.
I wasn't sure what I wanted to do for an adjustable foot. I ordered the Sail Etc
deck track and adjustable mount. Mine has popped out on Woody more than once.
Don (at Great Basin) doesn't offer many choices for these parts.
I need some more Pekabe fairleads if I run the rigging under the deck and if not
then Woody has three blocks on deck - using the bungee method.
I got the side stay racks this time and the jib rack - not sure I'll use them or
not.
Quick release turnbuckles are nice. At $10 ea - they're kind of high dollar
but easy to use. Don>>the KDH quick release turnbuckles are 2 to a package for 10.90.
Main Booms, Goosenecks, and Vangs,
The main boom of a model is linked to the mast by a swivel connector which allows the boom to swing from side to side.
Typically the boom on a model needs to kept from lifting when the sails are not trimmed in hard.
To keep the main boom from flying up a "boom vang" kicker a simple device is set between the boom and the foot of the mast. Vangs take a variety of forms from a trunbuckle, to a piece of fishing line to a line controlled by a servo to allow the boom to be pulled down or allowed to raise up.
Typically the boom on a model needs to kept from lifting when the sails are not trimmed in hard.
To keep the main boom from flying up a "boom vang" kicker a simple device is set between the boom and the foot of the mast. Vangs take a variety of forms from a trunbuckle, to a piece of fishing line to a line controlled by a servo to allow the boom to be pulled down or allowed to raise up.
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