H9 ASH 31 build, notes and questions

[BryanB]

Test fit...perfect!



Aluminum attachment plate with 6-32 hardware.








Fits perfect with good clearance all around. Hope it works!

[BryanB]

After a few flights on either wet or somewhat freshly mowed grass I found way too much spray and stuff not only on the inside of the fuselage but it made an awful mess on the inside of the canopy as well.

I started to make a vacuum form mold for a slip over of the entire gear like I did for the ASW20 like the one shown here:


Here's the start for the ASH 31:


But I was afraid on wet grass the moisture would collect around the gear motor and who knows...

So, I made a foam fender plug and after thinking sometime on how it would attach to the gear, glassed and waxed... spacer rods on the ASH31 gear are 5/16" diameter so I sliced a brass tube that had 5/16" ID for plug attachment points.


Built a box around it and filled with some old MPK 1125 silicone mold material I had laying around. Should have mixed it better as the silicone had settled really bad and left soft spots in the final mold. Stuffs a bit expensive otherwise would have bought more and made a new mold. Anyway...








The mold was half decent so applied a layer of gel coat then laid up a few layers of 6oz. glass.



The soft spots in the mold left a couple of bumps and imperfections on the final product but they were easily sanded smooth. I tinted the gel coat for a gray color. The good part was the attachment area turned out perfect with sharp, accurate reproduction..



I epoxied a small piece of aluminum on the inside as a nut backing plate.

[mtnbiker63]

CG smack dab in the middle of the 60-85mm marks. Landing gear waiting on Fedx to arrive with linkage. Then it will be ready to maiden.

[French1]

As I am waiting the snow to melt, I changed the elevator connection to use a Sullivan Ball connector, and it is much easier to connect the stab to the servo. Clearance is just what is needed...

Stock linkage vs mods

Sans titre by steffruelle, sur Flickr

Just enough room...

Sans titre by steffruelle, sur Flickr

Introduction of the linkage from the rear

Sans titre by steffruelle, sur Flickr

With the angle, no problem for the linkage room

Sans titre by steffruelle, sur Flickr

The magic no slop linkage

Sans titre by steffruelle, sur Flickr

[mtnbiker63]

The servo is a robotic servo, it's a Hobbypark digital 180. I called Horizon about my iX12 to see if there was something I could do different. But doesn't look that way. I just purchased the "Servo Stretcher". It makes any servo swing 180 degrees.

[French1]

if you have +150 -150 it means that the servo is not programmed or that the programming has not been saved
What is the servo you are using?

[mtnbiker63]

Stephane, thank you for the info. I now have another question. I bought a 180 degree servo and I can get it to move 180 on the servo tester in extended mode. Yet when I plug it into the receiver and try to move it with the TX, I only get 60 degrees of movement. The travel is set to 150%. Any idea of what I should do?

[French1]

I made it myself from a G10 plate I bought online, cut it with a hacksaw and sanded it, then press drilled it, and tapped the gear for 4-40 screws.

Another avenue is to use a boat rudder arm, metal of course as I tried with plastic and doesn't work...

BTW the axle of the arm is a 3mm one

[mtnbiker63]

Stephane, where did you get the "G10 Arm"?

[French1]

I took inspiration on your work with Scott, that was a great filed repair that allowed me to fly the entire season

[lenb]

Nice Stephane,
Looks like the one we made in Windy Ridge. Works really well.

[Swiss1]

Nice Stephane
Will probably do the same on Michael's!

Jeremy
SCCAAA TT TN

[French1]

Here is my mods on the electric LG

Just in case you would flip the wrong switch at the wrong time and destroy the electrical mechanism. Here is my way to convert the electric landing gear that has a great mechanism to a servo operated LG.
I used a 1x1in aluminum angle, a programmable servo and 0.04 music wire for the spring.


Sans titre by steffruelle, sur Flickr


Sans titre by steffruelle, sur Flickr

Sans titre by steffruelle, sur Flickr

Sans titre by steffruelle, sur Flickr

Sans titre by steffruelle, sur Flickr

Sans titre by steffruelle, sur Flickr

[ARUP]

Looks like Kevin had so much fun getting his 31 together that I'll just have to trade my yet to be started one for his so he can have fun all over again! Merry Christmas... early!

[gunny11]

Very nice Kevin. Looks great!