Control horns, is it just me or... ?

[Anthony Romano]

Have these on all surfaces on a used Prophecy. All mounts solid over 500 
flights. Also, the happy owner of Troy's former Hyde Away very solid and the 
plane puts a smile on my face everytime I fly it.

Anthony

>From: "Troy Newman" <troy_newman at msn.com>
>Reply-To: discussion at nsrca.org
>To: <discussion at nsrca.org>
>Subject: Re: Control horns, is it just me or... ?
>Date: Wed, 3 Sep 2003 13:46:53 -0400
>
>I don't have one loose in my hand right now...to remember how they are 
>attached to the base...Its sturdy though no question about it....I think 
>its molded plastic around the metal horn. The base is plastic.....I was 
>able to get them over the hinge line....They make a med and small that 
>central carries and there is also a large version too. Gator might have the 
>Large ones....Heck Central might have the larger ones too.....
>
>Seems to work fine.
>
>TN
>   ----- Original Message -----
>   From: Keith Black
>   To: discussion at nsrca.org
>   Sent: Wednesday, September 03, 2003 12:04 PM
>   Subject: Re: Control horns, is it just me or... ?
>
>
>   Troy,
>
>   Actually I'd looked at these on the central hobbies web site but there 
>were some things that concerned me about them.
>
>   1. From the picture I couldn't tell what the base was made of or how the 
>horn was connected to the base and I wasn't sure how sturdy it was.
>   2. It didn't look like there was much of an angle and I wasn't sure that 
>it would be enough to allow that tiny arm to reach the hinge line.
>   3. Initially I was concerned about it being mounted on the surface with 
>ply and not having a rod go through to the other side, though I've since 
>learned that this is also how the ZNLine horns are mounted.
>   4. And finally, I felt that a single rod through the surface would be 
>easier to align evenly on each side, assuming that I can drill a straight 
>hole :-)
>
>   Given that you've had good luck with them it sounds like they should 
>work fine. How would your respond to my concerns #1 and #2?
>
>   BTW, I hope you can make it to the Hot Springs contest. After reading 
>all of your informative posts it would be great to meet you.
>
>   Thanks,
>   Keith Black
>     ----- Original Message -----
>     From: Troy Newman
>     To: discussion at nsrca.org
>     Sent: Tuesday, September 02, 2003 9:53 PM
>     Subject: Re: Control horns, is it just me or... ?
>
>
>     MKD0815 Offset Aluminum Horn Medium size
>
>     http://www.centralhobbies.com/control_linkage/control_horns/mkd.html
>
>     They work well I have them on my Flashdance...(Artistic Aero) model 
>huge control deflections and huge surfaces.
>
>     I also ran them on my Hydeaway on the Rudder...Super Easy to 
>install...I use a Dermal Router attachment and countersink a piece of ply 
>into the surface. By the way I stick a piece of balsa in the surface also 
>then router it out....Sand flush and its a done deal...Never had an issue 
>yet..Hydeaway has around 500 flights and last I heard its keeping the new 
>owner very happy.
>
>     So they are an option.....
>
>     TN
>       ----- Original Message -----
>       From: Keith Black
>       To: discussion at nsrca.org
>       Sent: Tuesday, September 02, 2003 9:57 PM
>       Subject: Control horns, is it just me or... ?
>
>
>       When it comes to control horns for pattern planes it seems to me 
>that some of the most commonly used choices have a major flaw.
>
>       On my last plane I used the MK Aluminum Horns on all surfaces except 
>for the rudder where I used the IM pull-pull horns. Both of these are nice 
>horns except they have a major flaw when using a pull-pull setup. The flaw 
>is that the little black plastic arm that screws onto the horn and connects 
>to the clevis is so short that it doesn't extend out over the hinge line. I 
>know that with pull-pull systems it isn't *absolutely* necessary for the 
>connection to be exactly above the hinge, but the further back it is the 
>more slack there will be in the cable that is not pulling.  In my opinion 
>with these horns the connection point is too far away from the hinge unless 
>the horn is virtually mounted on the control surface bevel (especially when 
>it comes to rudder). This can easily be seen in these "instructions" for 
>installing the MK horns 
>http://www.centralhobbies.com/buildingtips/mkhorns/mkhornsinst.html. Notice 
>that in this picture there surface isn't beveled yet and the horn is almost 
>on the edge.
>
>       On my new plane I wanted to avoid this problem so I did some 
>searching to find a better solution. To begin with I looked for a longer 
>arm to connect to the MK horn, one that would extend out to the hinge line. 
>I found two options from Sullivan but both require too big of a horn thread 
>(6-32 and 8-32). My search then led me to two other choices that seem to be 
>good alternatives. The first is the ZNLine aluminum control horns, but 
>these are apparently only distributed by ZNLine 
>(http://www.znline.com/produits.php?langue=english&cle_menus=1025879382&cle_data=1025901639) 
>which means an international order. The other solution I've found is by RC 
>Model Enterprises (http://home.att.net/~rc-enterprises/rcme_014.htm) but 
>these control horns seem very pricey!
>
>       If anyone could point me to a longer 3mm connecting arm that will 
>fit on the MK and IM horns I'd be happy (BTW, I've used the MK BB 
>connectors on the MK horn and they still aren't really long enough).
>
>       Is it just me, or have others experienced this dilemma as well?
>
>       Thanks,
>       Keith Black

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