Comp-Arf Extra 2X2

[TheTank]

	Quote: Originally Posted by TonyThomasian
	There is a size requirement. I dont know which size exactly, but i know that the 2X2 is small for entering in imac.

This is 100% wrong. You can fly basic with a ucando 40 if you want. You could fly unlimited with a 60 size extra if you choose.

[TheTank]

	Quote: Originally Posted by youngflyer
	did they do away with the 80" rule?

Your thinking of IMAA, there never was a rule regarding size in IMAC.

[dmichael]

Back to your original question- I am not convinced that this plane with a gas engine would fit your needs. You said you have noise issues. Even a 50cc engine can be loud.

I would suggest that you look at a pattern plane with 1.4 glow engine and a pipe like a YS140 sport or an OS 140RX. These planes are remarkably quiet and, in my opinion, a pattern plane flies more like a 40% IMAC plane than a smaller IMAC plane does. It would be easy to transport, set up and fly by yourself too.

Dave

[TheTank]

I second Daves opinion. I currently use a 50cc Aeroworks Ultimate for evening practice after work at a field that is close to my home that had noise restrictons. Using the slimline wrap around muffler and a 23x8 Mejzlik prop, I am relatively quiet, but I still get some comments about noise from time to time.

[BreadBowl]

	Quote: Originally Posted by devcon9
	I have the Red/Yellow version, ZDZ50/23x8 Mejzlik/JMB Pitts/smoke system/ 5945’s all round. Not a light model, but does fly real well, loony amount of power with the ZDZ. Usual Comp-ARF quality, very easy build ( apart from the motor mount which needs a bit of time to get right,manual shows DA50 installation, with a template drawing) Keep the back end as light as possible, only gripe is you can’t get enough down in 3D rates without removing the lip on the underside (not advisable) Brought mine on a ‘ euro ‘ special price promotion, worked out cheaper than a lot of balsa/film models. Good flying Tony

It should be heavy with all that equipment in there. That's a heavy setup, not necessarily indicative of a heavy airplane.

[bogan]

The 2x2 Rocks ..... I have had mine flying for a couple of months now, and its a great machine for flying sequences with, or getting it down into the 3D.

I reckon its a good all round model for someone getting into IMAC, without the budget of a 2.3 or 2.6. Fits in the car easy too.

I went for the lightweight "airfield neighbour friendly" setup. The DA50 was going to be way to noisey for my club field without loading the model up with a big canister muffler. So I took the YS160DZ out of my lawn dart (er pattern plane), stuck it in the nose, and used a real simple bolt on muffler that Dave Shadel sells at performance spec. About 60 bucks. You can go all silly and get a flash Hatori setup for the YS, but value for money, the stub muffler is fine. Ok the Hatori is super quiet, so if you've got lots of money, get one. I also used the new Hyde Mount that does not need a nose ring. Also a good buy at about $60 from central hobbies.

Bit of extra work to get the CG right, I put the rudder servo right up behind the firewall, its easy to get to through the cowl. Elevator servos are where the rudder servo would normally be, and I used 4mm carbon push rods with the titanium barbed fittings central sell. Small servos might work out down the tail, but the YS is not very heavy, so you would probably need some lead up front to balance it. Plus I wanted lots of grunt on the stab, so I went for 8511's on elev, no sign of any flutter there, even with the long pushrods.

Test flew it at the CG setting in the manual, but soon found out the recommended spot was a little conservatively nose heavy, so in the end my CG worked out perfect at 30% MAC with no lead in the nose of the model. When I want to do some 3D, I bolt a small 2oz bit of lead on the tail and it real boogies. Walls, Terminators, Blenders, hovers great too. YS160 has more grunt than a pig on heat !!

Final flying weight was 5.6Kg. For you tanks, thats 12.3 Lbs. Compare that too 15 / 16 lb weight with DA or ZDZ, you can imagine it makes a huge difference when 3D'ing low down. Lighter they are, better they fly.

I've settled on the Mezlick 18x10 prop. 17x12 ok, but I think the Mez better for the flip n flop.

BTW - the neighbours down near the club field think its a great setup too !

Cher
Bogan

[sjdawes]

78-73.4 = 4.6

(4.6/73.4) x 100 = 6.27%

So, the stretched length of the 2x2 is within 6.27% of the full scale dimensions.

Have fun guys, I'm thinking about buying one.

As a side note, how does the weight and strength compare to a comparable stick-built??

Stephen

[red_noir]

I just order a prototype scheme yesterday, this is gonna be my first gaser I'm so stoked !!!