Hello I am putting together a SIG Cap 231 and have a question about the split elevator. The manual says to use a y harness that will reverse one servo how does this work and is it necessary? Can't I put the servo arms in opposite directions to make a mechanical "reverse"? Thanks for any help.


Also what is the best way to transport airplanes in the back of a pickup? I do not have a shell or cover nor do I want one. Has anyone built a caddy or something? Thanks

For best results build the plane so that the control rods are equal length to each elevator half. Here is a link to a reversing Y-Harness.
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXAFN1

As far as transporting in the back of a truck as you describe. I have a buddy that build a craddle out of 2x4's and carpet with J-hooks that he uses light weight bungi cords to restrain his planes.

Thanks for the info. Do you have a 67 stang? I have a 68.

No,... I have two 67's a 90 and a 97 My first was a '67 thus my favorite and namesake.

Just for your information, I just picked up a servo reversing Y cable at my local hobby store. He had several of them in stock. With these aircraft with dual elevator servo's, they are becoming a necessity for the local hobby stores to keep in stock. So, you may be able to find one there.

You can also purchase reverse rotation servos.
Example but not necessarily a recommendation:
http://www.horizonhobby.com/Products...rodID=JSP20050
http://www.horizonhobby.com/Products...odID=JSP20050R
In theory these should have balanced/equal performance.

I never have liked reversing harnesses, I've see one or two problems resulting from them. I suppose if you get a good quality product it will last a lifetime, but I'd feel more secure with a larger receiver, and the elevator servos on seperate channels. That way you can individually adjust endpoints after you've test flown the plane to remove any roll coupling with elevator (other than stalling, that is). The down side is that you of course need a radio system that will support mixing, and a big enough receiver.

Andy

mechanically you can do it but one servo would have to be mounted two widths of servo arms higher then the other so that makes physical placement extremely difficult. The simplest method is to have the servo reverser cable. The best method is to have a computer radio with sufficient mixing capability. I say suffcient because anything less then a futaba 9c just does not have advanced enough software for what you want to do. Sorry If I do not mention Jr or other brands but I am not familiar with any other brands enough to recommend. You have to creat linkages that are as close to the same length as possible for the servos or else you will get uneven movement. The computer mixing is best because you can incrementally computer trim the different sides so that the are even instead of trying to mechanically get them just close enough which you origianlly do before you computer fine tune them. THe 6exa and 7c are decent radios but you can not gang trim both servos in flight so you create a roll condition

Hey thanks for the advice I think i am going to get the harness the LHS has them. I might also try using the bigger rx it seems like that would take out a point of failure. I am not sure how reliable the harness is. Thanks again

Remember it's NOT just a case of bigger RX, the TX has to support the functions you desire.