stevew76

I have flown mine 2 times now and I keep getting a drop on the right wing. She will fly lovely and level and the wing would just drop. It's strange and can't work out what's wrong

nigefay

My Feedback: (1)

Sounds scary Steve! Where is your Cg? Have you checked and double checked the aileron servos? Mine is rock solid at 170mm Cg and the stall is really benign, but it will snap roll if you ask it too.
P.S. Where are you? I spent 25 years in Peterborough.

stevew76

I have mine set at 165mm with header tank full and about 1inch of fuel in the main tank. It does it only when she's going fast and I have to use loads of trim to left to get it to fly level. It kinda like a twitch but when flying slowly or coming to land it's fine and locked in.

I'm in Rushden Northamptonshire mate

Dave Wilshere

What servos/torque? Have you checked the servo under load?

stevew76

I have gone overy my servos all brand new align servos (like brand as never let me down when flying helicopters)
But no slop ect. But just strange I need a lot of left trim. I did level the ailerons out so was dead flush in the inner edge but soon as it took off it need loads of left trim.

stevew76

They are 12kg at 6v. I run them as 6v but does this on level flight when when banking. I'm trying not to think they are twitching and have bad pots as they are brand new and only 2 flights and setup time. Iv never had one of theses servos let me down before so just strange

Turbiner

Might sound obvious but what about servo extensions - poor connection could give you a problem. Try swapping the extensions to see if the problem changes sides. Is it possible that a rudder servo is causing the problem?

nigefay

My Feedback: (1)

If you're needing a lot of left trim there's obviously either a twist somewhere or a really heavy right wing panel. I know align servos are well rated in helicopters but on the two occasions I've used them it was a bad experience so tend to stick with hitec or jr these days. Process of elimination I guess as always, good luck sorting it out. Well worth it as it's an awesome plane when it's flying right, just got back from 3 flights on mine this morning.

stevew76

I will try the extensions for sure. Wouldnt the rudder just swing the nose to the left or right and not make it drop a wing ?

Thanks again for advise though guys

stevew76

Tbh your most properly right I know when I used them on my helis I was pushing them to the max and always held their gain.

What I shall do is just order some new servos for the ailerons and try again. I prefer to spend £150 then lost £2000

Si_B

You don't need to spend 150 quid on two aileron servos for an Xcalibur. I've used Align servos for years and they have been bullet proof. My Xcalibur flew faultlessly on 0252 mg Savox servos on all the surfaces except the elevator and rudders where I used Align servos.

I'd be looking at the receiver install, have you range tested with the turbine running and from different angles. I can't see how a servo would only cause a problem in a certain part of the flight.

Simon

stevew76

Yes I always rang test before flight but never with the turbine running.
Il try that next time.
Only said new servos as its twitch bit like a pot is going on the servo and buying 2 new servos wouldn't be a problem as I always have uses for them.

I try do a range check with the turbine running might not be allowed in my club but will try

Turbiner

Always difficult to choose servos as we all have our preference and we assume that the more you pay the better they are, I am not sure if that is the case. I would spend around £30 to £50 for ailerons and £80 for the elevator but in 30 years RC experience I have had very few failures even on cheap servos and none have caused a problem whilst flying, having said that it just doesn't feel right to use a £15 servo in a £2500 model. Servos intended for use on modern 3D helicopters get a lot of abuse so you would assume that they are tough.

Mesche

Hello guys, I'm new in this forum. I come from Germany and live in the Cologne area.

I have read the instruction manual because I'm ready to order one. What I found strange is that all control horns are simple plastic horns. They look weak to me and I would be very reluctant to use them. What are your experienes/advices?

Thanks for your help !
Markus

Dave Wilshere

Markus

168 flights with my P-100Rx powered example and no issues.
Plenty of Xcalibur's flying around me also all with stock horns.
I even used the small self tapping screw provided.

Dave

extra300s

Hallo

Was also skeptical. Also used supplied screws and once you screw them in you will see how solid they become... There is ply wood for them to screw into. And being a jet its exposed tgo very little vibration (only on the runway basically).

I used all hardware from the kit. Very very good package an flying jet - my favorite!

Mesche

That was quick :-). Thanks a lot. Once I have the parts in my hand I will do my final decision :-) but good to know that they work fine !
I have read through almost all pages !!! and I feel very knowledgable now. Thanks a lot again !
Best Regards
Markus

stevew76

TBH the instruction manual is one of the worst i have ever seen, its not that hard to work out how to build her like your self i read the manual and just threw it in the bin, The control horns are horns are very strong and as its a turbine jet there is almost no vibration which you would get from a petrol plane.

Iv not seen anyone fly one with different horns and all have been stock control horns, they are deff up for the job

Si_B

I went with a different horn on the elevator but standard horns on all the other surfaces. Seen plenty flying with standard horns but it's your model so fit what you prefer.

Simon

Turbiner

All supplied horns on mine but I always use hex headed screws as I don't like tiny cross head screws, have never used them in any ARTF I have built. I found the manual was adequate, it's not exactly a beginners model so some things should be obvious really and plenty of info on this forum if you need it.

Mesche

Quite often the argument has been brought up that missing vibration would finally allow the use of the plastic horns. The biggest concern to me in combination with a jet is not vibration but rudder flutter. To cover this concern horns, push rods, servos etc. can't be strong enough :-).

BR
Markus

Dave Wilshere

If there is flutter...no servo, arm, linkage or horn is strong enough.

There is no flutter on an Xcalibur, certainly when powered as limited by the manufacturer.

Aussie1

I sold my old trusty Excalibur so that I could buy a new one in the Thunderbird scheme. Finished the build but noticed that the bolts that clamp the wing spar were too short by about 4-5 mm. They would not even touch the captive nut! I managed to find a couple of suitable bolts in my workshop, but had to cut off a few mm as they were too long. Original bolt on the left. Just wondering, has anybody else had this problem?

Dave Wilshere

There have been quite a few kits shipped with 25mm screws rather than 30.
The early clamps were counter bored so 25 was long enough.
sometimes we supply 30mm screws with our additional pack when we see a batch where it's a problem.

Aussie1

Dave, thanks for the reply. The bolts supplied were all the same as the one that holds the canopy on. Other than that, very happy with it and can't wait to get it up in the air.