CARS II

My Feedback: (7)

Another thing you can do if the gear gets tuck in the up position, make sure the struts have a bit of a play on the up position, if they don't then the retract is pushing them against the inside of the wheel well, in order for the retract to work properly there has to be a bit if of play on the struts, if there is no play, add two washers under the retract screws facing the center of the fuse to give the wheels a gap between the wheels and bottom of the wheel wells.

Flying Fiz

I recently got my hands on a NIB Xcalibur, I've just finished the build with a Swiwin 80 turbine. Fabulous easy build and nice amount of room to lay out everything in an orderly uncluttered fashion.

Just two questions to the experienced Xcalibur team here,
1. I assume the CG in the manual (160mm from LE) is the preferred flying CG (yes/ no) if no, then what is the preferred CG.
2. A few posts above I saw the reference to the turbine needing to be installed with down thrust. This is the first I have heard of this and I didn't encounter anything in the instruction manual other than about using the wooden supports (which were of uniform thickness to centre the turbine in the model.
Thanks & regards,
Phil

Charles aldous

Hi FF,
I have yet to assemble mine, but from the notes I have collected in preparation, a lot of people start off the COG at 170mm and usually find this to be fine. Adjustment once flying characteristics are seen can be then done. Regarding the thrust angle, I have no plans to adjust mine away from the factory set-up.

Good luck.

Dave Wilshere

Balance at 170 with some fuel in tank ( at least 20mm)
No thrust change needed. Just tail sitting on fin tops correctly

Flying Fiz

Fabulous, thanks for the responses guys, I think I will balance at 170 without any extra weight, which will be perfect. Flying field closed down here as Sydney is due to end its long lockdown in a couple of weeks.
This will be my first turbine jet, but in lockdown I've built 3 others, but I think the Xcalibur will be the first one I'll fly to get used to the feeling of turbines on this forgiving airframe.

Cheers,
Phil

Custmachr

My Feedback: (3)

Mine is probably somewhere between 165 and 170. Depending on when the kit was made you may have an issue with the horizontal stab seating correctly on the top of the booms. Be sure you check this. I had to install some shims in mine. If it does not seat correctly the incidence will not be correct. I do not remember but I think the incidence will be negative if it does not seat correctly.

Dave Wilshere

You never need shims…just cut the rear fin notch to clear the underside of the tailplane sheeting.

Flying Fiz

Mine fitted in like a glove, so I think I should be good.

rustyives

This thread is quite long and packed with information, including setup etc. Is there a summary document anywhere with all this goodness in it?

CARS II

My Feedback: (7)

Dave Wilshere is the man you are looking for, he has al the ins and out of this jet.

Good luck.

Dave Wilshere

You don’t have to read the whole thread to find the info required. If someone took the time to summarise a set up it would be that persons view/way. The idea of these threads is to see a range of solutions and set ups. It’s worth the time reading through to learn.
Or ask the questions that are really needing answering and they will be responded to by a range of people.

arjan70

Hello , i,m searching for aome answers regarding flaps : When using flaps during take off , do we need also to hve some elevator down? or just flaps 20-25mm.
What about slow flight and landing regarding flaps and elevator settings ?

thanks in advance

Dave Wilshere

Take off flap will require around 1mm down. Landing flap around 3mm down

arjan70

Thanks alot Dave, and when you would fly with full flaps ( crawling ) how far down for the elevator ? in my boomerang manual they advice 15% down which I don't dare

Dave Wilshere

It’s the same as full flap. You should be able to deploy full flap and fly slow circuits. Once the gear is down there is little pitch change on an Xcalibur

arjan70

You mean full flap with 15% elevator down or 3 mm down elevator, sorry for asking

Dave Wilshere

Forget percentage. It’s a meaningless way of of quantifying it. 3mm down

Twin-star

Hi Guys, I was wondering what is the best way to set the elevator in line with the tailplane as a starting point for the maiden?
Thanks
Ian

Dave Wilshere

Sight from the side…

CARS II

My Feedback: (7)

Since my Roo is done with, then I can tackle my next project.

Short story.

I build this X in two days for my friend, he had it for 44 days, got a few flights on it till a pass in front of the Sun, lost visual with it and it ended up on top of the grape fields up side down, the hatch was total lost, a trunion fork was badly damaged, the fuse got the worst damage, cracked on the left side, the booms lost the bottom front part and the wings also came out with some damage.

I was able to get a hatch from a friend and a trunion fork from a really nice RCU member, without their generous contribution, I wouldn't have been able to find this parts, thank you.

And now, it's time to get busy.

CARS II

My Feedback: (7)

This time around, I will be making a few changes on the install, may even add a smoke system to it.

CARS II

My Feedback: (7)

Reading the thread to see what I can use on the rebuild to simplified the build ( very little space for accessories ) I will give this advice a try since I now have a pump with an air gage and I like the idea of less connections, this rebuild will be my first without air gages ( KISS ) 😀

Boomerang1

That's a shame, nice flying jet, many people would just bin it. Good to see you are fixing it.
Some people just give up, I have a Boomerang Intro which a friend stripped the covering intending to glass it but gave up. Now on the shelf waiting to be finished.

I have quite a few tiny air gauges from lots of bits I've collected over the years, none have been fitted to models for the same reasons as Dave gives.

CARS II

My Feedback: (7)

Good to know on the air gages, I don’t like to give up on airplanes with small damages and he doesn’t have the time to fix them, I will fix it, fly it for a while then give it back to him ( maybe 🤣🤣 ) I already helped him get a Falcon 120 a year ago.

BikerDon

Put a straight edge (the edge of a 6" rule works well) on the tail-plane long enough to overhang the elevator.
Adjust the linkage so the top of the elevator is level with the top of the tail-plane.
That's what I always do never let me down yet