what is 'pin angle'?
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what is 'pin angle'?

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    Default what is 'pin angle'?

    I'm trying to get my TX dialed and have been searching past threads for advice. The term 'pin angle' keeps coming up and I wanna be sure I understand correctly. Is this the measuring of the diverter pivot pin in relation to reverse bucket pin to determine nozzle angle or???

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    No Sandbar To Far sanger rat's Avatar
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    pin angle in relation to the bowl
    Quote Originally Posted by One More Year View Post
    The only blab's I will even be a part of is just when it is me they are talking about. Aaaah yes I can see a few good looking shiny tall deck motors on the beach, with barely enough fuel to get back to the launch saying, "Holy crap how fast you think that Daytona was going man? That's like the 20th time he's gone by today?"

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    Quote Originally Posted by sanger rat View Post
    pin angle in relation to the bowl
    Which pin? Now I'm lost.

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    Senior Member GT Jets's Avatar
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    Quote Originally Posted by 75 TX View Post
    Which pin? Now I'm lost.
    Steering king pin, similar to caster on a car.....
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    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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    okay, so then pin angle is adjusted how? Wedge between droop and bowl?

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    Quote Originally Posted by 75 TX View Post
    okay, so then pin angle is adjusted how? Wedge between droop and bowl?
    Yes, however with a droop it get's complicated because the thrust line moves up/down with the wedge additions/removals....
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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    No Sandbar To Far sanger rat's Avatar
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    That why all the snoots and droops act different. HTP's snoot you can order with a 0 or 4 degree pin angle.
    Quote Originally Posted by One More Year View Post
    The only blab's I will even be a part of is just when it is me they are talking about. Aaaah yes I can see a few good looking shiny tall deck motors on the beach, with barely enough fuel to get back to the launch saying, "Holy crap how fast you think that Daytona was going man? That's like the 20th time he's gone by today?"

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    Quote Originally Posted by 75 TX View Post
    okay, so then pin angle is adjusted how? Wedge between droop and bowl?
    on a bare droop, the difference between the flange that bolts to the bowl, and a "straight line" down the steering pin holes, is what's commonly referred to as "pin angle". most droops have between 7 and 9 degrees "up" pin angle.

    so, if the bowl flange is 4 degrees down compared to keel angle, simply adding a droop with a straight nozzle would result in a minimum 3 degrees "up" nozzle angle, when referenced to keel angle. then, wedges would used to adjust nozzle angle.

    you can't really adjust or modify "pin angle"; it's a result of casting and machining the pin holes. you can order stuff with varying pin angles, but the casting isn't really any different - it just has the pin holes bored such that the pin angle is different...

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    Quote Originally Posted by bp298 View Post
    on a bare droop, the difference between the flange that bolts to the bowl, and a "straight line" down the steering pin holes, is what's commonly referred to as "pin angle". most droops have between 7 and 9 degrees "up" pin angle.

    so, if the bowl flange is 4 degrees down compared to keel angle, simply adding a droop with a straight nozzle would result in a minimum 3 degrees "up" nozzle angle, when referenced to keel angle. then, wedges would used to adjust nozzle angle.

    you can't really adjust or modify "pin angle"; it's a result of casting and machining the pin holes. you can order stuff with varying pin angles, but the casting isn't really any different - it just has the pin holes bored such that the pin angle is different...
    So what should I be shooting for? I put an angle finder on my bowl, keel @ zero, and the bowl is angled down 3-4*. Then put the angle finder on the steering pin and it's roughly 5* up.

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    Quote Originally Posted by 75 TX View Post
    So what should I be shooting for? I put an angle finder on my bowl, keel @ zero, and the bowl is angled down 3-4*. Then put the angle finder on the steering pin and it's roughly 5* up.
    using a flat spot on the keel and your landmark, if the bowl flange indicates 4* down, and a line through the steering pins indicates 5* up, the "pin angle" is 9 degrees. not uncommon as most droops have 7-9 degree pin angles. so, if you have a straight nozzle attached to the droop (as opposed to a p/d), nozzle angle would be 5 degrees up, or very close.

    not about the "shooting for?" question. most gullwing guys seem to like 5-7 degrees up, so you seem to be right there...

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    Quote Originally Posted by bp298 View Post
    using a flat spot on the keel and your landmark, if the bowl flange indicates 4* down, and a line through the steering pins indicates 5* up, the "pin angle" is 9 degrees. not uncommon as most droops have 7-9 degree pin angles. so, if you have a straight nozzle attached to the droop (as opposed to a p/d), nozzle angle would be 5 degrees up, or very close.

    not about the "shooting for?" question. most gullwing guys seem to like 5-7 degrees up, so you seem to be right there...
    Thanks for your responses BP....I think I'm gettin' it. One thing I'm still not understanding is if the bowl indicates 4* down, steering pins indicate 5* up, wouldn't the net result be 1* up?

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    Senior Member bp298's Avatar
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    describing this doesn't seem to be working. i'll try this, with one caveat - the measurement pictured is a close guestimate, and not to be considered 100% accurate. needed an extra hand for the pic, but no one's home, and the dog doesn't take great pics.

    the droop flange is flat on the floor, which has an 0.2 angle (basically flat).



    the steering pin line shows 7.3 degrees (which i couldn't hold tight).



    using this as an example, the "pin angle" would be 7.5 degrees. if i really wanted a totally accurate number for this thing, it would probably be more like 7.0.

    hopefully, this answers the question, what is meant by pin angle....
    Last edited by bp298; 08-16-2010 at 01:03 PM.

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    Quote Originally Posted by bp298 View Post
    describing this doesn't seem to be working. i'll try this, with one caveat - the measurement pictured is a close guestimate, and not to be considered 100% accurate. needed an extra hand for the pic, but no one's home, and the dog doesn't take great pics.

    the droop flange is flat on the floor, which has an 0.2 angle (basically flat).
    the steering pin line shows 7.3 degrees (which i couldn't hold tight).
    using this as an example, the "pin angle" would be 7.5 degrees. if i really wanted a totally accurate number for this thing, it would probably be more like 7.0.
    hopefully, this answers the question, what is meant by pin angle....
    I now totally understand what is meant by pin angle. What I didn't understand was if the bowl is @ 4* down and the pins were @ 5* up how would the pin angle be 9*. I know that 5
    +4 = 9, but I was thinking that 4* down (negative) + 5* up (positive) yielded a net of 1* up. Guess it doesn't work that way, and instead pin angle is the sum of the two angles irrespective of up/down.
    Thank you for your patience

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    Quote Originally Posted by 75 TX View Post
    I now totally understand what is meant by pin angle. What I didn't understand was if the bowl is @ 4* down and the pins were @ 5* up how would the pin angle be 9*. I know that 5
    +4 = 9, but I was thinking that 4* down (negative) + 5* up (positive) yielded a net of 1* up. Guess it doesn't work that way, and instead pin angle is the sum of the two angles irrespective of up/down.
    Thank you for your patience
    i think we were assuming your pin angle measurement to be "installed".

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