Xairflyer

My Feedback: (1)

I would use crow braking more to increase washout at slow speeds rather than actually slowing the jet down so I would use it no matter how slow it comes in without it, think it can be a great benifit to most jets

Xairflyer

My Feedback: (1)

The XL had its first flights today flew perfect, just few clicks of trim, CG at 340mm from TE seems ok, 25deg of crow braking is very effective on the Jet much more so than on the Intro.

Plenty of power from the big AMT Pegasus

Pic beside my Intro which shows the size difference, the XL is a big aeroplane! (lost a red stripe on port wing on first flight!)

CARS II

My Feedback: (7)

Congratulations on the maiden flight and many happy flights

Xairflyer

My Feedback: (1)

Can't understand why they stopped selling it, Alan Cardash said it was the best thing he designed then stopped selling it!

highhorse

My Feedback: (2)

??????

Still listed for sale on the web site (US)

Xairflyer

My Feedback: (1)

It seems to have been replaced here with the torus, probably weren't selling that many

BaldEagel

And the tip tanks are still back to front.

Mike

geh3

My Feedback: (84)

The XL was replaced by the XL II that has some nice strength improvements over the XL

highhorse

My Feedback: (2)

Nah, XL II has been out for more than 5 years, at least. U may be thinking of Torus.

Turbinac

The XL II is still popular, and selling very well in the USA. It is arguably the best jet trainer around. At speed it is like any other jet, deceptively quick due to its 90"size (quicker than it looks!) and a real kick to fly, but for flying at low speeds, in my opinion it is unbeatable. As I always do, I aimed to design a jet that did more than just go fast. Have a look at this;-
[link]http://www.youtube.com/watch?v=UDxwbbNHQ0o[/link]

highhorse

My Feedback: (2)

Just to avoid further confusion, I'm certain that that in the post above Alan meant XL II rather than simply XL.

HenryRG

This model stil gives me great pleasure. Thanks for posting that video. It was delightful flying and an example to us all.

When the wind is bit strong and gusty, then I pick up my XLII. Yesterday being a case in point, with wind gusting 25-30mph swirling every whichway around the trees beside our field, she handled every problem and landed so gently you would have thought it was a calm evening. In my view she remains a truly great model. I am amazed it is not still available from Boomerang Jets here in the UK as it still is in the USA. I would recommend it as a first jet to anyone who has a 120-160 engine.

rossi63

highhorse

My Feedback: (2)

A few years ago there was a bit of a heated argument in a Boomer thread about Alan Cardash's designs calling for the use of Servo screws to mount the retracts to the rails. I defended Alan at that time, railing against a rude know-it-all who insisted the practice was folly, and suggested that because Alan had designed and sold quite a few jets in his time that he was probably on to something.

It dawned on me today that the topic is worth revisiting, because since then I have had the opportunity to *thoroughly* test Alan's methodology and reasoning.

Even in my sincerely overweight XL II (I added a bunch of crap I didn't need to and it weighs 40 lbs wet), on grass, and with several "firm" landings plus a short one in the dirt off of the approach end (against the freshly plowed crop rows, mind you)....the puny little 9/16" servo screws have held up very well. On the totally dorked up short landing my jet came to a stop in about 5 ft (!) and the screws did exactly was they were supposed to do: they gave way enough to prevent ripping out the rails! A few drops of CA to firm up the screw holes, two cents worth of new screws, and all was well again.

I do have trailing link gear, and that helps a lot, but I suspect the method is even MORE valid with straight legs, since there is less give built into the gear, and the screws can act as a "fuse", blowing themselves out and saving the rails and/or pins...

Hope this helps someone !

Don.

ChrisPetersen

My Feedback: (3)

I have had a blast with my Boomer for a few years and this winter I decided to change the look a bit. I glassed the wings , center section and the elevator. Then I flite metaled a good part of it then painted the rest. It's not perfect but I have had a lot of fun. I also did a full cockpit and changed the canopy to an ultra flash one.

Mark C

My Feedback: (26)

Who or do they make electric trailing link retract set for the Boomerang XL?

ChrisPetersen

My Feedback: (3)

I believe Dreamworks offers them.

Xairflyer

My Feedback: (1)

Nice job chris looks great

luckymacy

No more love for the XL II? This was a great thread. I picked up one used that needed some TLC and this thread was a great resource. Is there a more currently used thread on this XL II design?

CARS II

My Feedback: (7)

Mine gets lots of LOVE every month, out of my 3 jets this one gets the most flights.

luckymacy

Looks good Carlos.
Approximately where is your 'empty' fuel CG at and weight? Mine's had some repair work done with some carbon and fiberglass stiffening up in the forward fuse area. Total weight of mine without fuel is probably about 32 to 33 pounds.

What are your low and high rates at (did you end up using differential on the ailerons)?

If you have a low and/or high rate crow mix, what did those come out at?

how many degrees of FULL flaps do you use and in what conditions do you use flaps and how much for no wind vs windy days?

harpoonrs

I've had them. Nice model easy to fly.
alas a wing exploded in the air, probably overtaking the VNE! 600 flights to his credit.

the CG is shown in the attached drawing, it's a very front CG, can be backed up to 20mm. good flights with.

harpoonrs

original drawing

harpoonrs

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harpoonrs