Push-Pull Tail Setup

[PaulH]

Chris posted some excellent instructions a while back that descibed how to set up the upgrade push-pull tail on an Intrepid. With his permission I have reproduced them for everyone to read.

One note from Chris: Although the instructions show a Futaba GY401 gyro being installed, they have found that the push-pull tail assembly doesn't not offer enough throw for a GY401 to work well. The "limit" setting on the GY401 needs to be above 100% for best operation. The push-pull assembly requires that the limit be near it's lowest position. This leads to poor tail performance and low gain settings to compensate for the loss of resolution.

[Helisin]

Chris posted some excellent instructions a while back that descibed how to set up the upgrade push-pull tail on an Intrepid. With his permission I have reproduced them for everyone to read.

One note from Chris: Although the instructions show a Futaba GY401 gyro being installed, they have found that the push-pull tail assembly doesn't not offer enough throw for a GY401 to work well. The "limit" setting on the GY401 needs to be above 100% for best operation. The push-pull assembly requires that the limit be near it's lowest position. This leads to poor tail performance and low gain settings to compensate for the loss of resolution.I don't suppose the newer pilot (like myself) :dontknow would notice a big problem with the 401. My limit is set at 85 to obtain full travel with no contact on either side.

[Helisin]

Nice of you to post it. Thanks! :D

[PaulH]

The only thing that you might notice is that you have to drop the gain fairly low so that the tail doesn't wag. That means the gyro won't hold the tail as well as it could. There will be a higher chance of it drifting.

Chris, jump in here if I'm totally off-base, but I think that's what I remember you telling me.

[SeaHawk]

I was just comparing the pdf instructions to the instructions I got with my brand new, recently purchased push pull kit. In the pdf you posted, it says to put the two balls on the short end of the arm. In the instructions that come with the pushpull kit I just got, it says to put them on the long arm. Which is correct???
I know it works o.k. on my first Bergen on the long side. Was this a typo or a revision to instructions that come with upgrade?
Also, the instructions that come with the kit (#7033) have you mount the two balls on the arm on the left side of the arm, servo side, and the pdf version has them screwed in on on the right side of the arm,which is opposite side. Do different kit versions have different length control arm pivot posts?

[cbergen]

I'm not ignoring you Gary, I'm checking into it. I do know we changed where to put the balls, but off the top of my head I cannot remember which is the proper way...


Edit


Ok, Use the PDF instructions. We changed the balls to give a mechanical advantage due to the weak (27 oz/in) servo. It also allows for a higher limit setting required for the 401.

[SeaHawk]

I imagine it doesn't make that much difference, but we all know that assumptions are not always correct, so best to ask.

[miami6]

this is my setup


http://img.photobucket.com/albums/v649/miami6/Bergen%20Build%20part%202/Servo%20Linkage/th_DSC_0120.jpg (http://img.photobucket.com/albums/v649/miami6/Bergen%20Build%20part%202/Servo%20Linkage/DSC_0120.jpg)
http://img.photobucket.com/albums/v649/miami6/Bergen%20Build%20part%202/Servo%20Linkage/th_DSC_0122.jpg (http://img.photobucket.com/albums/v649/miami6/Bergen%20Build%20part%202/Servo%20Linkage/DSC_0122.jpg)
http://img.photobucket.com/albums/v649/miami6/Bergen%20Build%20part%202/Servo%20Linkage/th_DSC_0124.jpg (http://img.photobucket.com/albums/v649/miami6/Bergen%20Build%20part%202/Servo%20Linkage/DSC_0124.jpg)