RE: Hanger 9 AT-6
 

Thanks for all the great info, I called Robart a couple of days ago and ordered the heavier wire for the retracts...that is the kind of info you would never get unless you read a forum like this....some of the items are slowing my construction but the end result in learning from all of you will be well worth it...Bill

RE: Hanger 9 AT-6
 

Chopper,

I ordered the gear as well from Robart. They were shipped out on Thursday priorty mail. I should get them Monday or so. Keep in touch. We're getting hammered with rain here. How about you guys?

RE: Hanger 9 AT-6
 

From what I have read ( and seen with the H9 P-51 ),the retracts are the biggest problem. Its too bad the manufacturers dont get it that most people I know,and I am sure most clubs,fly off of grass fields,rather than concrete/paved runways,etc...and would make things easier to just use a heavier gauge wire to begin with.
I am interested in what "Spring Air" comes up with ( and at what cost ),to remedy the retract problem Hanger 9 has. I am definately going to get a H9 Texan,and also the new H9 Corsair when it comes out! Knowing what will work,before I get the planes will help alot. One of the guys at our local field has the H9 P-51,and he struggles with the wire gear retracts both taxing,and landing because of all the flex in the retracts.I just got the H9 T-34,but will not use the optional retracts for it.
Thanks to all in this discussion for the ideas/tips

RE: Hanger 9 AT-6
 

Tried again to fly the AT-6 today. No dice. The plane would wobble and rock like it was Trying to dance. Really P.O.'d I took out the retracts and one of the wire gear legs were loose in the retract. Also re-bent the gear. What a pain.
I will write to Horizon and ask them what's the deal.
Paid $239 for a great flying plane that you can't take-off.
I will let everyone know what they say.
Side note: the Thunder Tiger .91RFS is really starting to purr. Stable idle at 18-1900 or less with OBglow. Right now transition. 14x6 is just perfect.
If only I had landing gear

RE: Hanger 9 AT-6
 

I'm just putting the finishing touches on mine. I have a bit of a problem though, my retracts aren't going all the way up? I'm assuming I need to adjust the linkages on the retract servo, but what exactly do I need to do?

I ordered the upgraded wire gear from 'Robart'. I'm expecting to receive them on Monday hopefully.

Thanks for keeping us posted Bumstead. Oh,,,,one more thing, I'm also getting a lot of servos buzzing. I can't figure out where the bind is? Oh,,,last one, speaking of bind, I'm getting a lot of binding with the elevator and rudder control rods. Did you have the same problem?

thanks for the flight report, take care,

RE: Hanger 9 AT-6
 

I have a H9 AT6. Has anyone had trouble with the firewall? ON the test flight last Thursday night, the airplane lifted off, made a righthand turn to come back across the field, was about 75-100 feet high. The engine went to idol, there was no response on the trottle, it then went into a 45 degree dive with no control into the ground. I got the model home, and the firewall, in my opinion was not glued in satisfactory. Couldn't tell what kind of glue was even on it. I called Hanger 9 and sent the model back to them. Hope to hear from them this week. I also had trouble with the retracts, I finally got them working satisfactory. It is a very good looking airplane. I hope to have another one or have the one sent back repair, if they don't do anything.

RE: Hanger 9 AT-6
 

Maybe a not too intelligent question,but is the h9 AT-6 ARF a scale flying plane or does it just have scale looks?Horizon hobbies has it under the scale catergory.I"m only wondering:eek:

RE: Hanger 9 AT-6
 

Look at my previous post about the firewall. I had a"very" short first flight a-la tip stall on rotation. Firewall completely seperated from the fuselage. It seems to be hot-glued.
It was easy to repair as it was just two pieces. Lots of 30 minute epoxy and clean up the joints. I have a TT .91RFS and I need a firewall that stays where it's supposed to.

The retracts are another story all togeather. They are 85 degree not 90 and they are a bear to deal with. I have written Horizon about them.
I took mine completely out, rebent the wire back to shape, doubled up on the set screw that hold the gear wire in the mechanism. Removed the gear covers as the bolts grab the tires and it dances down the runway like a drunk sailor
Haven't yet tried taxiing after the mods
Cruz, as far as buzzing servos, did you seal the hinge joints with clear Monokote?
Make sure that your control surfaces aren't binding. The dowels do cross in mid tail but wood on wood probably isn't the source of stiction. Maybe the rudder servo might with the tail wheel be the first place I'd think.

RE: Hanger 9 AT-6
 

Geezzzzzzz, I'm about to cry. I've been working on those friggin' retracts for about 3 hours this evening and just decided to quit. I need step by step instructions on how to install the servo (which direction), how to install the servo horn(which one, I'm using a round one) how to set the wires on the horn and when to tighten the set screws on the easy connectors? I've done everything I know to do and nothing is working. They still only go half way up. I even dailed in 125% EPA on my radio and that still didn't help. I'm using an HS-75BB retract servo, with the current stock gear. I just ordered the robart upgrades, should be here tomorrow.

I didn't seal the hinge joints with clear monokote, but did use my trim iron on the existing covering to seal everything down nice and tight on the hinges. I know for sure the rudder is not binding as I'm going to use a sullivan tail wheel bracket in lieu of the stock setup. I also didn't use the stock wooden control rods. I bought sullivan 2-56 control rods with sleeves. They do flex a lot and prevent full throw of the elevator and rudder. Need to figure something out which that? I didn't use the stock rods on the ailerons, but used dubro clevises instead of the stock ones. As far as the firewall, I coated mine with a lot of thick CA on the ends. You think that might be good enough or should I dab some 30 minute epoxy on there?

No much more to report. I've been logging in a lot of hours on the plane. I was up to 0500 Saturday morning working on it. I'm tired.

take care all, have a good week,

RE: Hanger 9 AT-6
 

Cruz, check the pictures. Servo fully counterclockwise when veiwed from the top, gear is up, fully clockwise gear is down

RE: Hanger 9 AT-6
 

I am building this as well.I ordered a set of 90 degree robart mechanicls today for it.Looking at the demensions on the website they are extremely close to the included gear.Should only require minor trimming i hope.This should take care of the wobbling back and forth and the incorrect angle of the gear. Ron

RE: Hanger 9 AT-6
 

Perfect,,,thanks for posting. That's exactly what I'm talking about, right there!!!!!!!


Let me give it a shot later, I'll post an update, check back. Thanks again buddy,

RE: Hanger 9 AT-6
 

This should work with little modification at all.Like i said just ordered them today.I will get back with everyone when they come in. Ron

RE: Hanger 9 AT-6
 

I received mine today, wanna see them? Give me a few minutes, I'll post a pic.

RE: Hanger 9 AT-6
 

here they are.

RE: Hanger 9 AT-6
 

These are nice mechanical gear.I have used them in the past and have never had any problems with them.

RE: Hanger 9 AT-6
 

Did you buy just the struts or the complete gear?I am installing the complete unit.Iam putting these retracts in a modeltech p-47 arf and they fall right in.

RE: Hanger 9 AT-6
 

I bought just the struts.

RE: Hanger 9 AT-6
 

I have the Hangar 9 AT-6 and I always use 30 minute epoxy on the firewalls of any ARF that I purchase for that reason. I have never had a firewall come loose.

RE: Hanger 9 AT-6
 

Wanted everyone to know that Hanger 9 in the form of Dave Snyder, tech Support has rectified my problem with myH-9 AT-6 gear. It speaks volumes when a company goes out of the ordinary to listen and respond to a product inquiry.
Thanks Hanger 9, I will be a repeat customer.

RE: Hanger 9 AT-6
 

What are they doing for you? Oh also, what size is that set screw that holds the gear wire in the mechanism?

RE: Hanger 9 AT-6
 

They said they would replace the gear. Pretty square of them.Thanks Hanger 9.
As to the screw size...No clue, drilled them out for a 8-32 set screw and used two.
BTW, alot of the slop in the gear comes from the clearance between the trunion and the case. The case is plastic and the trunion is brass, any small clearance wobble is magnified at the axles. Also internally, the gear needs play to actuate the slide.
I took (sliced) off about .0020 of the gear "Up" stop, this made the gear about 89degree up rather than 85. (They are 85 to accomidate the dihedral in the wing) But this increased the inward play. Solved that by drilling small pilot holes in the stop arms of the trunion and used VERY tiny screws to take up the slack.
Works great.
Drilled out the gear for 3/16 Robart wires
Modified the wheel wells to accommidate the difference in the wire bend configuration.
Lot of work but...funs'fun

RE: Hanger 9 AT-6
 

Sounds good. Can you post of pic of your gear please, if you're able?

RE: Hanger 9 AT-6
 

I hate to remove them (again) but if you take yours apart, you can see how the mechanism works. The little sliding "anvil" pushes on the trunion to retract the gear and pulls on it to extend the gear. You will see the case end acts as a stop. This edge was taken down about ,0020- .0025 " allowing the gear to extend more by a couple of degrees.
However, the gap that the "anvil" has to make up widens, that's why I used the teeny-tiny screws to make up the diff.
They have to be round so the anvil will slide over the head.
You could probably think of someother kind of shim but it worked.
Very little slop when fully extended and the retract position clearances aren't changed.
Use a drill press when you install the 3/16" Robart wire so you get a straight cylinder for the wire to enter. Tight fit with a 3/16" drill bit but better tight than loose. Ain't it the truth.

RE: Hanger 9 AT-6
 

I've already installed my robart wires with no problems. I have yet to taxi test the plane or fly it. One of my gear wires came loose at the field, that's why I was considering two set screws that hold them in. Oh, plus couldn't get my engine to idle. I'll let you know how it turns out.