FenderBean

I did but for some reason the gyro would jolt all of my servos when the jet was just sitting there. It happened at random times. You could see the igyro unit glitching so either something wasnt right or the unit is bad. Either way I dont trust it and I took it out, but now that I have flown the jet I plan to try it again. It works because others have done it, mine may be a software version issue... I have had no luck finding the updated software to download, I have asked Powerbox multiple times and there website does not have an actual link under the software tab. I will try it again and see what I can come up with it, I mainly bought the Igyro for my F-14 and wanted to give a try on this one before putting it in something of a much higher value.

I dont think they jet needs a gyro after flying it, if your going to do the hover stuff with the BF300 stuff sure it may help if you run it with the thrust vectoring. I have some new gears for my rudder servo on the way and a short servo arm so when I fix that I may go ahead and see if I can set it up again.

George

My Feedback: (57)

Don't you just use the PowerBox Terminal software to update the unit?

FenderBean

Hey guys, i think I found the problem with the rudder. I always try to keep my servo arm length as short as possible, i didnt realize how long my servo arm was and how much I had to cut the end point down. So when I replaced the servo gears and ran the servo it it had very little throw and would creep to the end so the resolution is way down.. The new short servo arm which allows me to fix this, I hope this was the problem and I will be replacing the elevators as well just in case.

TJPro351

My Feedback: (8)

Anybody receive any direction (or parts) from SM to re-enforce the vertical stab/rudder?

FenderBean

Mine come with the extra carbon. It's a pretty simple upgrade but I think the tall can use some extra wood as well.

kjb

My Avanti is pretty much ready with just radio to set up

I have the carbon cloth reinforcement but today in the post I received a skymaster envelope with Avanti XXL addendum on the label

inside some carbon cloth and 2 carbon plates

just wanted to share info no notes or details, I have mailed SM awaiting information

FenderBean

where exactly are they saying this goes because upon further inspection of my rudder there are more problems. The carbon rod in the rudder that goes into the clamps on the fuse has not glue around it, only a little where it goes through the fly at the base.
and now I either have to cut out the control horns to install longer ones or cut the servo mount out inside the the rudder and glue in another to move the servo so I can get proper clearance for the rod. POS

TJPro351

My Feedback: (8)

No instructions on where to put the cloth and plates?

Fender......the 4 or 5th flight on my avanti, I started to get flutter. I did install carbon cloth on base of vertical stab (inside fuselage) and on rudder side from the first directed addendum from SM. I also cut the servo mount in the rudder and moved the servo closer to outside skin. My servo arm is now 1" verses 1.5". I have been flying awhile and have not seen any flutter as of yet. But now I am paranoid with this new addendum coming out.
I was removing vertical fin to inspect (and get ready for the new parts from SM) and snapped the forward bolt off on the rudder post clamp trying to loosen it up. I just hope I will be able to get the broken bolt piece out?! I wish SM would have put a servo box on the side of stab for rudder servo. Then I would have glued the vertical stab on and not worry about it!!

FenderBean

well I have yet to be contacted about anything, my servo at the time of flutter was 1 in. The above picture was during the build when I just attacked everything for the photo. I do have carbon on the bulkheads around the rudder and stab mounts, so if this is the add-in then its not enough, im just tired of dealing with the constant mods these things require and like I said the main carbon rod has hardly any hysol on it so I will have to cut things open and properly fix it.

johnzqh

Hi All

Above photos show how addendum parts are added to fuselage inside where fin is fitted:

Step1: Apply carbon fiber cloth with epoxy glue to the two formers inside fuselage.

Step2 : Disassemble the aluminum bracket for main spar of fin.

Step3: Sand two carbon plate and apply glue.Assemble aluminum bracket with carbon plate back to place.Fitting them with carbon fiber cloth for better strength.

Best regards

John
Skymaster

FenderBean

Mine has this, this is an old add in I remember this being a topic shortly after they started producing it. Hmmm

FenderBean

Well I finally mustard up some motivation to fix the rudder servo setup today. I cut the current mount side so I could move the servo closer to the outer wall and get the rod connection lower to the server center.
I also glued in ply block on the bottom to give the servo screws more wood to grab. It this point im down from 1 1/4 from center to 3/4 from center on the servo, so if it flutters again the rudder control horns are to small or something else is a problem. Possible entire rudder flexing but I doubt the entire rudder flexing would have destroyed the servo before the rudder its self. Who knows with no indication of flutter I have nothing to go on.
I did a video with the mod and a flight report on the first four flights, Cheers and get off rcu and go spend time with those mothers you jet junkies!

FenderBean

Oh and I fix the hinges on the gear door as well, the stock are very thing plastic that break super easy I had already replaced one and this one was the other. I used the dubro heavy duty hinges which are much stronger than the old, I recommend just doing this from the get go. I had to use clamps since the material is very thin and when the old hinges are removed it does not retain the shape, I also added a piece of carbon fiber on the mount side to replace the factory fiber glass they added.



Plus pictures of the final linkage setup

FenderBean

gear door fixed

FenderBean

So I received the same parts today, after looking at it I dont see how this will fix the problem but I will add it. The hard mounted part of the rudder is very rigid as is and this doesn't explain the stripped servo.
I am in the same boat due to the applying the cloth over the brackets my bolts have glue all over them and doubt I will be able to remove them without breaking something. Also im not sure they mean it or not but I will be using resin not epoxy to apply the cloth and use hysol on the plates.........I am guessing this is what they meant to say?

I already tried to remove the aft bracket before so I doubt I will be able to now......it does appear the carbon plates go on the aft bulkhead. Dont forget to re-balance folks this is a bit of weight far out on the tail!

FenderBean

ATTENTION! ATTENTION! ATTENTION! To anyone who has this model I would advise you to check the four bolts that hold the clamps on on the bulkheads for the rudder. All but one of mine are loose, it would seem my normal build mod slipped my mind during this build.....The problem is this, the flimsy washers and the soft wood used in this area is allowing play to develop. I normally dont put washers that are real thin and this small of a diameter on wood, because when you tighten the bolts that hold the clamps to the bulkhead it crushes the soft wood and will appear tight but after a few flights it just wears the wood even more cause the fit to loosen...I cannot say this caused my problem but I can easily see how your rudder could be fine one flight and during the next develop slop and cause the entire rudder assemble to flutter. Ultimately destroying the area and causing it to depart.

Upon closer inspection of these areas I would laminate everything with carbon fiber and use larger/thicker washers to any side of the bolt that touches wood. I will have to butcher the hard carbon plates to install them per Johns pictures since the carbon fiber already installed is not sitting flat to the ply so I will use what I can and add carbon to the entire area.....I think the SM mod will add strength to the area but the thin washers crushing the wood need to be on the outside of the carbon and with larger washers if possible to spread the load and not crush the area around the mounting surface. I normally do this to all my models not sure why I missed these. so remove the bolts and washer(going to be crazy hard to do) apply carbon fiber with resign to the entire bulkhead, add a hard carbon plate if you can then a good washer that will not bend and then bolt/nuts.

you can see the washers are crushing into the soft ply with the skymaster logo, this is the same light ply that you see in all the ARFs the only thing its good for is making equipment trays and light stress load ares in my opinion. Anything with any kind of bulkhead load or a crushing load like a bolt should always be good heavy duty aircraft ply. Even then bolts are not made to ran through wood like they tend to use them without being laminated first with something much harder than wood.

Disclaimer these are only my opinions/recommendations please follow all recommended addendums that is the only way you can build your case...Cheers

FenderBean

just an update, for people like me with carbon cloth installed the carbon plate SM sent is not going to work.... the current carbon fiber layup is very bumpy and there is not any place with a flat surface to glue to....The only option here is to grind all the current carbon out and redo it with the plate(dont think its possible due to the location) or cut the carbon plate up like mentioned in the addendum which renders it useless except for something hard for the washer and nut to press against. I am going to laminate with with thick carbon fiber and use the plate the best I can with larger/thicker washers.

FenderBean

The work so far, once the resign sets up some I will trim and clean up area.

FenderBean

It ain't purdy as we say in the south but it if something flexes now its the entire tail section or the surface itself LOL

FenderBean

Holy cow batman I just got what you meant by this, I didnt understand PB has an actual update utility LOL I will try that

FenderBean

Well thanks for the help I just updated my igryo srs, hopefully I can get it working on my Avanti now

Oh if anyone uses the Xicoy CG machine on their Avanti XXL let me know going to be giving mine a go tomorrow. Would nice to compare measurements, cheers!

duffyy

Hi John johnzqh

I sent you an email on 4 May 2015 regarding missing parts from my kit to which no response has been received
I also sent Anton a PM here with no response

Please advise as to what is happening about the missing items

Also, please provide me with a list of upgrades required for this kit

Brian

johnzqh

Hi Brian

just resent mail to you.

pls check.

John

FenderBean

Works 100% of the time 80% of the time!

FenderBean

On a building note the all the carbon is in the tail and all the bolts are installed again and tight! Now I just need to throw the tail back on and rebalance due to the added tail weight.

If there is any flex/flutter then the entire tail section needs some redesign. Rudder mount is probably the strongest area now.