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The YAK54 is a very neatly designed EPO 3D parkflyer. With smart features such as side-flip canopy for super fast battery & wing removal, 1 nylon bolt wing brace and unique rudder hinge system. This YAK54 doesnt borrow hinges or horns from the parts bin, it's all totally new, resulting in a plane comprised of parts that work together better, reducing weight, increasing strength and ultimately making it a more enjoyable plane to fly and work with. Because of it's weight, the YAK54 only needs a very economic motor system, the 2408 sized brushlessoutrunner gives more than enough power on a 2S 1,000mAh battery. You don't need to buy expensive batteries to enjoy this plane, 20C is all thats needed! The large control surfaces and quality included servos make this very 3D capable. Wing moulding and fuse fit together perfectly with unique servo locations and you wont find any ice-cream container cowling here, it's all EPO!
This is a well designed and totally new 3D parkflyer that won't dissapoint even hard core 3D pilots. It's scale details visiually appeal and are backed up by it's flying ability!
And finally, in both cases I'm definitely not looking good on a 20 Amp ESC... In the 3S and 25C configuration (these are the batteries I have ...) I'm pulling 21.26 amps which is obviously too much... But on 2S I'm actually far worse as with less voltage I'm forcing the system to pull more current to compensate and I end up pulling 30 amps dead on... Definitely can't expect that to work for long... I should have done these calculations before as it is actually 2S that is more dangerous since I wasn't running my 3S wide open anyways... Perhaps breaking that prop is a blessing!
Sorry, I forgot to mention that I'm assuming the recommended 1000 mAhr battery that is recommended which if I have this right is just a factor of unity and doesn't change the figures, but of course my units are off!!
I'm actually using the 1500 mAhr nano tech 2S 20C battery which hits the sweet spot in theory... But in practice I think the supplied prop isn't the best match and a larger thrust disk will have clearance issues... I broke my prop on a slowly accelerating take off as my plane bounced across a slight dip in the 'runway' just shy of take off speed. My inexperience made me tentative and therefore I used more runway than needed. As the tail was already lifting up the bounce was enough to catch the prop due to ground clearance. Definitely pilot error, this isn't a beginner plane but ce la vie...
I've only flown twice and briefly as I snapped the brittle three blade prop. I could not prop hang/hover... Plenty of power with 3S * 25C (trying to stay at or below 75% power for fear of smoking the motor or ESC) but the thrust disk seems too small to counter the torque rotation of the motor. Then again, I'm inexperienced so definitely might be my **** piloting skills... BTW wouldn't 25C * 2S put this right in the 12 - 15 watt per Oz sweet spot for 3D??? 7.4V x 25C = 185W and Mine comes in at a hair under 15Oz flying wt for 12.33 W / Oz... Somebody check my maths and reasoning please!
Anyone flown this model? wondering where the C of G will be best set at? Thanks. Great looking model and no issues with the packaging or condition, everything works well. Very small gripe would be the weakness of the sevo horns, but very easy to replace.
The answer to my question is about 80mm from leading edge works ok, this is the result of pushing the recomended 2s 1000mAh battery to the front of its compartment. However plane feels very light, is prone to light winds, flys slowly and certainly will not prop hang, not exactly 3D. So, Have resized battery compartment, and fitted 3S 1000mAh combined with a much cheaper and more common 8X6 2 blade prop. My reconing is proportionaly going from 2S batt to 3S is about balanced by losing a blade. The motor calculator bears this out so Im gonna give a go. It certainly does prop hang now and then some so just waiting for clear skies. Will update even if I smoke it out.
All is good with the 1000mAh 3S and 8 X 6 upgrade combo. the extra weight adds enough stability to greatly increase the speed and the extra propwash gives a real 3d feel. Tail snaps round, rolls are about 4 per second with end holes on ail horns. Plane is prone to tip stalling and will immediately flat spin until full throttle is applied to reorient tail. Dont know if this is a trait with the original setup. Keep the speed up and this is a great value entry to 3D flying, big step up from my pitts.
of me to use this rc on this model?
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Customer Reviews
Overall Rating
3/19/2013 steve
4 likes
Value
Quality
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Good strong and forgiving entry level 3D model, you do have to squeeze a 3s 1000mAh battery in but the ESC motor combo has given me no issues over 30 flights. In all honesty mine has all but expired now but has taught me how to handle pretty much anything. The nose is a solid chunk of foam with a weight in and will take a lot of abuse, I run a 2 blade 4 X 6 prop and it pulls out of a hang easily. Highly recommended.
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