Stratus tail push rod length?

[thespin]

I'm just finishing up my stratus, when after gluing everything into place, I found that the tail rotor pushrod is too long! What is the proper length for the stratus tail rotor pushrod?

[Mille aka Fredrik]

Have a look here http://www.helifreak.com/about9686.html

[Yellowjacket]

The total length of the push rod should be 31” 5/8 (this is the carbon fiber part)

Bill

[Wayne]

Yellow Jacket Bill:

Unless I read something wrong, page 160 of my Stratus manual says the push rod length is 30.5 inches, I'm not sure where 31 5/8" came from. And... That's what mine are.

Wayne
www.flymha.com

[Yellowjacket]

Wayne
On my Stratus with the open tail box from the front ball on the front bell crank 12 o’clock to the ball on the tail case bell crank in center position is 33 ¾ I measured the push rod again and that is the length of the carbon fiber. Then add 1/4 of an inch of all thread exposed on each end and the rest is the combined length of the ball links.It sounds to me that you have more than 1/4 of threads exposed on each end or I read another posting something about brass ends on the Stratus kits.
Bill

[DavidH]

From the Stratus instruction manual page 160.
0868-11 Tail rotor push rod 30.5"

Page 176
One 0868-11 t/r push rod
• One #121-6 M3 x 75mm control rod
• One #121-5 M3 x 42mm control rod
• One #0868-20 brass sleeve
• Two #0133-1 grey ball links
• One #0868-4 Teflon tube

Select the 42mm control rod and one grey ball
link. Thread the rod into the link until it bottoms
out. Use #80 grit sandpaper to roughen up all
of the exposed push rod (you should remove
most of the black color).
Roughen up the inside one end of the pushrod
using a small round file. Roughen the first ¼” of
the outside of the rod on the same end.
Slip the brass spacer over the push rod by a
couple of inches. Insert a few drops of slow
Cyanoacrylate adhesive inside this end of the
push rod and fully coat the exposed port of the
control rod. Push the control rod into the end of
the pushrod until the ball link bottoms out on
the rod. Wipe off the excess adhesive and let
this dry for about an hour.
Now roughen the bottom of the ball link using
sandpaper. Apply a liberal coat of slow
Cyanoacrylate adhesive around the bottom of
the ball link and the end of the push rod. Now
hold the rod vertical and set the end of the grey
ball link on a hard surface. Using your fingers,
push the brass sleeve as far against the ball link
as it will go as shown. Wipe off excess adhesive
and let this dry thoroughly.

Page 178
Select the 75mm control rod, measure
23mm and apply a piece of masking tape.
Wrap it several times around the control rod.
Using #80 grit sandpaper, thoroughly
roughen up the 23mm end of the control rod.
Using a round file, roughen up the inside of the remaining end of the t/r pushrod, about 1” inside.
Insert a few drops of slow Cyanoacrylate adhesive inside this end of the push rod and fully coat the 23mm
portion of the control rod. Push the control rod into the end of the pushrod until the tape bottoms out on
the rod. Wipe off the excess adhesive and let this dry for about an hour. Remove the masking tape

David

[Yellowjacket]

Thats what I thought.
the brass spacers are taking up the rest of the space.
I bought the up grade kit that section is not in that manual.
If you dont have them then you would want the lenght to be 31 5/8 or you would have way to much of the threads exposed.

Bill

[DavidH]

the brass spacers are taking up the rest of the space.


Bill not really. The brass sleeve is just slid over the end of the rod. It is not taking up any space. The brass space only goes onto the shank of the ball link about 1/2 inch or less.


Push the control rod into the end of
the pushrod until the ball link bottoms out on
the rod. Wipe off the excess adhesive and let
this dry for about an hour.
Now roughen the bottom of the ball link using
sandpaper. Apply a liberal coat of slow
Cyanoacrylate adhesive around the bottom of
the ball link and the end of the push rod. Now
hold the rod vertical and set the end of the grey
ball link on a hard surface. Using your fingers,
push the brass sleeve as far against the ball link
as it will go as shown. Wipe off excess adhesive
and let this dry thoroughly.


http://www.miniatureaircraftusa.com/Support/Instructions/Stratus%20Assembly%20Manual%20Standard%20Head%20R1 .3.pdf

Page 178 of the instructions.

The brass ferrule is only located on the end of the carbon rod next to the tail rotor bellcrank.

David

[Yellowjacket]

I don't know what to tell you david.
I don't know about yours but I just built it two days ago and mine is 31 5/8
like I said.You have to figure if the distance 33 3/4 and the rod is 30.5 the ball links arent that long, ther has to be more than 1/4 of threads showing.
I just dont like to see that much I would rather just have the rod a little longer thats all.

Bill

[DavidH]

All I was doing was explaining how the Stratus instructions state to build the pushrod. If someone wants to build the pushrod different than the instructions. That is fine.
The instructions provided with the Stratus are located here.
http://www.miniatureaircraftusa.com/Support/Instructions/Stratus%20Assembly%20Manual%20Standard%20Head%20R1 .3.pdf

The part for building the tail rotor pushrod is located on pages 176-176
The length of the carbon rod is located on page 160.

David