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robin(at)PaintTheWeb.com
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 Posted: Wed Jan 11, 2012 1:01 pm Post subject: New Gust Lock |
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We recently have been experimenting with a gust lock mechanism for our RV-10 that holds the stick in place w/o the use of seat belts etc… The goal was to design a small unit to lock the control surfaces in a neutral position without using the seatbelts or other systems that could shift over time. We played with a number of different designs but most were not completely successful due to the curvature of the stick around the binding area. Ultimately we decided to place a hard point on the stick to guarantee no movement when attached. I was worried that the stick hard point may get in the way but it is a non-issue. Photos of our final design.
[img]cid:image009.jpg(at)01CCD060.43FB6B10[/img]
[img]cid:image010.jpg(at)01CCD060.43FB6B10[/img]
[img]cid:image011.jpg(at)01CCD060.43FB6B10[/img]
[img]cid:image012.jpg(at)01CCD060.43FB6B10[/img]
The above design is made from solid stock. Had we to start from scratch we would probably build it out of thinner (lighter) aluminum made structurally sound with reinforcement and bends. Also properly designed a single seat side pin is all that would be needed. We ended up with two pins because the holes were already there from a prior concept.
Mate this with our Rudder Gust Lock (below) and you have a pretty simple & small locking system. I keep both parts in a Ziploc bag stored in the baggage area.
[img]cid:image014.jpg(at)01CCD060.43FB6B10[/img]
Robin
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johngoodman
Joined: 18 Sep 2006
Posts: 530
Location: GA
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| Posted: Thu Jan 12, 2012 6:32 am Post subject: Re: New Gust Lock |
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Robin, if there are no clearance issues, then it looks like an excellent design. Just out of curiosity, would this design also allow for an optional crotch belt?
John
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robin(at)PaintTheWeb.com
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| Posted: Thu Jan 12, 2012 9:08 am Post subject: New Gust Lock |
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Zero clearance issues.
I don't fully understand your question. Are you saying you have a crotch belt and want to know if our design will work when considering the belt attachment area? Because the -10 is the only movable seat in the RV line of aircraft I don't see how anyone has a crotch belt for the front occupants. Not sure where it attaches with the seat moving forward & back? That being said our design should work because we basically attach forward of the leading edge of the seat "bench" area.
Regardless there are MANY different ways to attach to the "bench" area, the key was the hard point on the stick. Even that can be varied by having the hard point facing forward vs. facing aft in my set up and making the actual gust lock grab around the stick and connect to the forward facing hard point opening. One could also make the attachment area "straddle" any items that may be in the way. I drew up a few different concepts to consider (attached).
The beauty of the forward facing hard point is that you can hang your fuzzy dice or pine fresh smelling tree from the hole when not in use. 
Good luck,
Robin
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bwestfall
Joined: 22 Oct 2008
Posts: 131
Location: Portland, OR
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| Posted: Thu Jan 12, 2012 10:08 am Post subject: New Gust Lock |
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Robin,
Did you consider a hinged piece on the gust lock itself that closes around
and captures the stick instead of attaching the locking tab? Drilling into
the stick shouldn't be an issue but it would be that much easier to install
and leave no trace if removed. Some form of capture method may work with
the larger diameter of a covered stick as well.
-Ben
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robin(at)PaintTheWeb.com
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| Posted: Thu Jan 12, 2012 12:18 pm Post subject: New Gust Lock |
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Yes our first concept was a complete failure (below).
The issue is the curvature of the stick. Note scratched stick. Bummer. The hard point solved all the issues.
One could take this design and add a couple of legs to the base to support the bracket from falling down. Plus an edge trim to prevent scuffing the stick. Keep in mind this all started with a discussion of parking your plane outside during a sudden major weather event. What would surely prevent the control surfaces from moving? This was our solution. There are others..
The stick hard point is very positive in locking the entire system together
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toaster73(at)embarqmail.c
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| Posted: Fri Jan 13, 2012 10:27 am Post subject: New Gust Lock |
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Robin this is great timing I too have been working a similar design but have not built one yet. I was looking at incorporating this RAM mount (see link) to hold the stick vice the permanent tab approach (which I like too). I ahve not done any "robustness" analysis yet. I also want to integrate rudder lock.
http://www.ram-mount.com/NewProducts/ezstrapmotorcyclemount/tabid/3599/Default.aspx
-Chris Lucas
N919AR Flying
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jkreidler
Joined: 13 Feb 2008
Posts: 151
Location: Sheboygan Falls WI
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| Posted: Sat Mar 03, 2012 6:08 pm Post subject: Re: New Gust Lock |
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Robin, nice design, is this something your planning to sell? I am getting ready for Sun-N-Fun and need a new gust lock. Ours was lost last year during the tornado.
By the way, we do have crotch belts in the front seats. We ran cables from two bolts on the back of the seat (kind of made a Y) so the belt moves back and forth with the seat. Bad explanation, no pics sorry - but it is possible and I really like having the belt there to keep the lap belt positioned correctly down low across the hips.
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Jason Kreidler
4 Partner Build - Sheboygan Falls, WI
Tony Kolar, Kyle Hokel, Wayne Elser, Jason Kreidler
N44YH - Flying - #40617 |
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robin(at)PaintTheWeb.com
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| Posted: Sat Mar 03, 2012 6:55 pm Post subject: New Gust Lock |
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Jason. Not trying to sell just share with the community. It works extremely well but one has to be willing to add the stick tab. The tab has been a non issue since install and the lock is rock solid.
Good luck,
Robin
Sent from my Galaxy Nexus
jkreidler <jason.kreidler(at)regalbeloit.com> wrote:
Robin, nice design, is this something your planning to sell? I am getting ready for Sun-N-Fun and need a new gust lock. Ours was lost last year during the tornado.
By the way, we do have crotch belts in the front seats. We ran cables from two bolts on the back of the seat (kind of made a Y) so the belt moves back and forth with the seat. Bad explanation, no pics sorry - but it is possible and I really like having the belt there to keep the lap belt positioned correctly down low across the hips.
--------
Jason Kreidler
4 Partner Build - Sheboygan Falls, WI
Tony Kolar, Kyle Hokel, Wayne Elser, Jason Kreidler
N44YH - Flying - #40617
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=367701#367701
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jkreidler
Joined: 13 Feb 2008
Posts: 151
Location: Sheboygan Falls WI
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| Posted: Sat Mar 03, 2012 7:18 pm Post subject: Re: New Gust Lock |
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Thanks Robin - I was looking for the easy way out!
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Jason Kreidler
4 Partner Build - Sheboygan Falls, WI
Tony Kolar, Kyle Hokel, Wayne Elser, Jason Kreidler
N44YH - Flying - #40617 |
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