xxsnookxx

There is a new video of quique flying the 73" with the evo 26gt on his website now check it out way cool.....

jolly_roger_uk

Just maidened mine today.............

YS 1.40 on gator mount
18x6W APC Prop (30% nitro)
4 x 8411's, 1 x 8425 on rudder , 811 on throttle
Weighs around 11lbs

Think its one of the nicest models I've flown to date.....

akschu

My Feedback: (5)

How fast does your YS1.40 turn that prop?

Glad to hear that your flights went well, I hope to be next.....

randy racer

My Feedback: (3)

great pics, glad to hear it went well. now you need to make a video for all of us Yak junkies.


randy racer

jolly_roger_uk

Tac'ed it at 8600, fairly slow spool up but works pretty good

Ron McGrath

My Feedback: (10)

have you tried a apc and if you have what is the rpm

akschu

My Feedback: (5)

jolly_roger_uk,

I just balanced mine and I too have to move the battery to the tray right above the switch. How did you mount yours? I can't seem to find a way to mount it so that I'm confident it will hold. I have a pretty heavy battery at 10.5 oz so it will weigh 6.5 lbs at 10g forces. Perhaps I went a little overkill on the battery, since it can [link=http://sanyo.wslogic.com/pdf/pdfs/HR-43FAUP-3200.pdf]handle a 10 amp load[/link]. I have another 6v battery that only weighs 5.8oz but it's only 1400. Im guessing that 4oz is a bit of weight penalty on this bird.

schu

randy racer

My Feedback: (3)

FROMECO 2400 = 3.3 oz, regulator= 1.5 oz and you can fly all day. i have started using these on every thing i fly and love it.

randy racer

jolly_roger_uk

I made a tray on standoff's so that the battery would clear the throttle servo (this was glued in place), wrapped the battery in rubber and the whole thing was cable tied to the main tray.

Hope this helps

Lee

wildnloose

jolly roger uk,

What is your opinion of the ys 140 in this plane??? Is it adequate or would you like more??

jolly_roger_uk

I'm happy with it, unlimited vertical, hovers at 1/2 throttle with plenty in reserve to pull out and the wing loading feels just right. The 1.60DZ would be a waste IMO

Zippi

My Feedback: (10)

Since a lot of guys are running the OS 160 at 56oz, I was thinking of the Brillelli 40cc gasser coming in at 52oz. I watched a video of the Wild Hare baby Edge 540 with about the same weight, wing span, wing area, and it seems to fly the plane great with the little 40cc. You guys that are running gassers in this plane, what do you think of this match up?

akschu

My Feedback: (5)

I don't have a scale big enough to weigh my OS 1.60 but the book claims 33oz and the bisson pitts is only 5-6oz so if you compare that to the "Weight RTF - 3lbs 4oz" the Brillelli lists, the OS is almost a pound lighter.

40cc should be stronger than the 26cc glow engine, so it will probably hover just fine, the question is will that extra pound make the wing loading to heavy to fly well.

Another consideration is the battery. Jolly Roger and I both had to mount the battery over/under the RX tray, so adding another 12-13oz to the front may cause you to put the RX battery in the tail.

Zippi

My Feedback: (10)

akschu,

Thanks for the info. Not sure where I came up with 56oz @#!$#%^%&*^(&(. Off of Towers site its about 42oz with the stock muffler. I'm looking for a nice plane for the Brillelli 40cc.

randy racer

My Feedback: (3)

guys i got 6 flights on the 73" yak tonight with the 3W 28cc. the plane flys like a QQ yak should...GREAT! the 3dub has good power and with a little break in and a better prop i think it's going to be ok. as it is pull out is a little slow but will pull out. i didn't install the cowl because i wasn't sure i would leave the engine on but now i think i will. it balanced out with no problem with only one elevator servo in the tail and the UPS scale said it weighs less than 12 lbs. after i order some props to try and burn a little more fuel through her i will let you know how it is doing.

still a happy QQ yak flyin dude

randy racer

captinjohn

Zippi: Did you find that plane for the 40cc engine yet? Capt,n

Clayton Wheaton

I was wondering what kind of preformance I would have with a saito 1.80 in this plane and what prop to use on this motor? thanks and have a nice day!!
Clayton Wheaton.

EMVIN

Clayton, I am using a Saito 180 with a pro zinger 18X6 and think its great. If you intend on flying 3D this is a great set up. You must use a fuel pump with this set up I tryed it without one and the engine runs very hot and was down 500+/- RPM,s. This is all due to the position of the fuel tank set back on the CG... there is approximatly 8" of line from the tank to carb. ....EMVIN....

RICK9303

My Feedback: (172)

Clay, I think the Saito would be fine, for the Yak. It weighs very close to the OS 1.6, and already comes with a muffler. Fuel draw is a little weak, with muffler pressure, so the pump would help. Once you get them set, you can forget them. I was running a 16 x 8 APC on mine, so a 18 x 6 will work. You also can run 20-20 0r heli fuel if you want max power.

Rick Matteson

STG

My Feedback: (26)

The pipe was overkill on the OS160 and 11 pound plane and I wanted to move C.G. forward so I switched to a Bison pitts(ends cut). I had it already...I do like the Slimline more as I think it is less restrictive (more power and louder). I have had a chance to fly it and it is still more than ample power on a hot humid day at 1300 feet.

I also had a chance to try out the Skorepa 19x7 prop and it works great. My OS160 turns it at 8,000 rpm --- 3D RPM's are noticeably lower making the motor sound better(more like a gasser) and the down line breaking is much better.

_______________

I think if QQ had tested the EVO2.6 with the SK carbon pipe and SK 18x6 prop the results would have been impressive.

akschu

My Feedback: (5)

STG,

Does the bisson pitts muffler work better with the tappered ends cut off? If so I'll whack them off tonight. I'm not at all worried about the fuel pressure as I bought a cline regulator and will be using case pressure to push the fuel.

I currently have an APC18x6w prop but was thinking about getting a menz 18x6 to try as well. I looked for the Skorepa over [link=http://www.escomposites.com/wooden_props.htm]here[/link], but only saw that size in electric. Is that what your running?

Have you documented your OS-160 setups anywhere? I wonder what fuel pressure system you use and how you set the needles, plugs, fuel, etc....

Thanks,
schu

Maudib

My Feedback: (51)

The swaged tips do increase backpressure and lower noise a little, but at a cost of RPMs... some have reported several hundred....

Since fuel pressure is not an issue for you cut them just above the swage and enjoy the extra RPM....

STG

My Feedback: (26)

akschu

My Feedback: (5)

Hmm, 5% fuel with the A5 plug is a bit less timing, that may do the trick.

A 19x7 should be a bit more load than the 18x6 menz, but may be a wash with the APC 18x6w because of the width and weight. Since your engine turns the 19x7 at 8k you might get 8800+ using the 18x6 menz. If that is the case, they will probably perform fairly similar, but the 19x7 may be a bit more economical.

For me, I would like a setup that runs on 15%. I know that that's a bit of nitro, but all of my other planes run that fuel, and I would rather pay $3 more for a gallon (silly isn't it) than pack a bunch of different fuels to the field. I figure I'll end up running the A5 plug myself otherwise I'll need to run it pretty rich.

schu

xxsnookxx

anyone running the os 1.60 without the pump with good luck?