Vettster

Hey How are you! Sorry forget your name. I think you will see a lot more of the xcaliber next year. My buddy is getting one too.

The formation flying was fun! But we need more practice lol

Trevor

BTW.. I'll be sqeezing my P-80se in her as she pushed that old draggy Sprint jet over 200mph Hint guys..diesel=Power

Fly Mower

Anybody using Aileron differential..?

My rolls aren't as axial as I'd like - might be due to the fact my CoG is little a forward than most (that said, I'm not really sure how CoG effects the accuracy of rolls...)

Any views..?

Dave Wilshere

Differential is needed with a twin boomer, fractional have you first measured yours move the same? I see more where mechanical set ups or servo miss match gives different movement on each wing.
If perfect then have 1mm more up than down aileron.
Always check going vertical, either up or down!

More Xcalibur activity today at PMFC. Roland and Bugz were at it with their P-100Rx examples

i3dm

My Feedback: (51)

Flying the Xcalibur with Jetcat P-80 yesterday:
https://www.youtube.com/watch?v=9enwUarMU0w I love this jet / turbine combo!

Dave Wilshere

Just imagine, lighter and more power :-)

i3dm

My Feedback: (51)

Mine in the air feels as light and as powerful as any 100 powered X.

Dave Bugz

Dave, don't think the "Formation Cup" has much to worry about just yet, with a few more YEARS practice we might get there. Great jet, great day only spoilt by the fact I had to take the good lady shopping later that afternoon.

pylonboy

My Feedback: (2)

Brent H.

"Squeezing" will be a good term for installing the P80SE!! My old P70 just fits in without too much carving. Yours will definitely have enough power though..............love my P80SE, but it is a brick compared to the new turbines. I was out with "the other Trevor" yesterday and he was flying a new Sprint with a Rabbit in it and you can see it is lighter and more agile than my P80SE Sprint . It had great vertical too!

If I were doing a new build with a new turbine it would either be a VT 80, P100RX, Rabbit or Merlin 100. Obviously the 100's get a nod for the vertical power.

As Dave W. pointed out above...........there is no comparison between heavy and light setups with the same power. It's simply a matter of fact that lighter planes react quicker, fly faster and land lighter. That being said, you gotta have fun with what you have!! Mine is a budget build and the P70 was just laying around anyway, so...............that equates to cheap fun!

I guess I should start posting some build pics.............I'm about 70-80% complete. Not sure exactly because I bought mine from another member that started the build and didn't get too far. Just going over everything again for piece of mind because he had never built a turbine jet before. So far I prefer the overall construction and layout of the Xcaliber as compared to the Boomerang Sprint.

Vettster

I hear ya Brent.. I have two engines in for service right now. The K100G and the P-80se. The 100 might end up in the Xcaliber after all and P-80 in the F-104 or the WetJet that im building.

dmattmul

Is everyone using 76 mm wheel for the main? I was just sent 66 mm and concerend avout grass departures. Any advise wouls be appreciated.

Thanks

Dave Wilshere

Yes, 3" (75mm) is right and probably what you want.

D

dmattmul

Thanks, Dave.

dmattmul

My supplier thinks the 76 mm mains are going to be to tight. They are close so I understand what he is seeing. They are Pro-Link electrics and use Intairco wheels. Is anyone using Intairco wheels? Could these be slightly larger than the ones JSM supplies? I know the web site for Ripmax shows 76 mm and the picture of the wheel has 3 on it so I am pretty sure this is correct. If I stay with the smaller ones (66 mm) I can maiden the airframe this week. If I need to replace will not be back in the states till January. Any advise?

Dave Wilshere

Clearance is fine sounds to me more like they want you to keep what you have ;-)
At the end of the day it will fly from grass with the smaller wheel, but it will work the gear and legs harder.
I would wait for the right ones but it's your call

dmattmul

Thanks, Dave. Yes probably easier for them but also quicker for me. They have said they will take the one back no issues. The supplier is a great supplier with good customer service. I think since it is tight he did not want to sell me something that might jam which is the safe thing to do. The smallest wheels I have used so far with jets is 3 inch and wanted to stay with that size. Again thanks for the help !!!

Scottbh

So my Xcalibur is almost finished apart from checking the C of G. I have set the control surface, ailerons 23mm up and down with 8mm CROW mixed in with full landing flap, elevator is set to maximum possible without binding on the rudder which is also set to maximum, flap is 20mm for takeoff and max for landing, also have brakes mixed in with down elevator but only when full flap is deployed. 20% expo on ailerons and elevator. As this is my first time setting up a jet I would appreciate your comments/thoughts please gentleman.

Dave Wilshere

Too much CROW! I think it lands much better without, depends on your turbine (residual thrust varies massively) If you want it to sit slightly nose high have 4mm CROW

There is no right or wrong, everyone's brain/fingers work differently, but you will always get it down with a soft control set up...where you can get into trouble quickly with too sharp/much control power.
You know your comfort zone, if you like positive feel around the centre then stick with low Expo figures, but maybe reduce full throw a little. If you like it softer you can just increase the expo another 10% on each.
Calm and smooth you will have nothing to worry about

Dave

Scottbh

Thanks Dave, I'll reduce the CROW to 4mm and try it out, it's a p100 turbine by the way. Thanks for the quick reply and positive encouragement

Scott

Dave Wilshere

Cool, P-100 you don't actually need any CROW as idle thrust is nice and low. But at 4mm it won't dump much lift and you can chose.

You have down mixed with flap? tiny bit more should be added with the CROW.

Last thing to check is elevator Neutral, make sure you start with it level flaps clean

Dave

emilsanto

My Feedback: (39)

Hello
can anyone tell me if the kingtec 100 or the jetsmunt 100 will fit in this plane without issues/mods.?
also has anyone flow the xcaliber and the boomerangs sprint . how did the compare
thanks

avionics

My Feedback: (3)

I put BF100 and its over power. At idle the plane runs too fast i the runway and landing with difficulties. I sent back my turbine to BF turbines and requested them to reduce the idle to 35000 since then i havent had a chance to test as i moved. But i would say 100 is over power and landing is too fast.

dbottaz

Yes, I have a Kingtech 100 in my X Caliber, fits and flys great. You don't need the extra power but you can throttle it back. To land you must get it dirty and cut power early enough on final and you are good. We have a 700 ft runway and use it all safely.

Dave Wilshere

Its nothing to do with 100N its the idle thrust. We all fly with JetCat P-100Rx turbines and 270' strip no problem, people only look at the top end power and not where the real development goes...low idle thrust and reliable running.

Turbines with higher static thrust do need more drag, I set one up with a JetsMunt 100 and it needed 85 degrees landing flap and I also split the rudders with full flap, so they open 1" (25mm) each side. No pitch change just drag. The Xcalibur is free running on the ground, so set the nose wheel with a section of silicon tube over the axle trapped between the leg fork and wheel hub, this makes enough friction to stop it free rolling on the ground.

To answer the original question, the Sprint is a great flying aeroplane, its simple and fun to fly, but it does not hold much energy so people who learn on one and go onto a normal sports jet or scale model can struggle, as shutting the throttle does not naturally slow the craft. I'm bias, but the Xcalibur is a much better learning machine if you want to move on to other jets. The Xcalibur is an easy to fly sports jet, no stress and being a glass fuselage it does not suffer with fuel on the film like the Sprint.
My Xcalibur is coming up 3 years old and still looks great.

Dave

BF 100 is more than 100N
dbottaz, looks like you can add some more flap, it makes a big difference.

Si_B

My Xcalibur is fitted with a jetmunt 100. Fits perfect, loads of grunt and perfectly happy getting her into a tight grass strip with no run off. I do use crow to help but no other issues.

Flew my Sprint for a year or so before getting the Xcalibur. Both great planes but the Xcalibur does fly better. Landing wise, I'd say the Sprint was easier as it was more draggy.

Simon

izzy

Mine has the k100 and sits much more forward than the picture that dbottaz posted a few posts back
Lands perfectly and can land on a 50 m strip
Take offs are great with the extra power
Best fun jet