The YAK54 required a large 37 series outrunner and 60A ESC. With a wingspan of 1.5M and an area of 43dm2, it's a huge 3D Foamie that is sure to impress! The YAK54 includes many quality details such as panel lines and rivets, cockpit & pilot, a twin servo (NOT INCLUDED) controlled elevator (just like giant scale), big scale servo's (NOT INCLUDED) for each aileron and a big powerful prop hanging outrunner(NOT INCLUDED). The main wing includes a large carbon spar, and bolts together tightly while being easy to remove for transportation. The tail slots together in 3 pieces with two bolts and epoxy for a much needed extra strong hold. The cowl and engine detail are moulded in foam (no ice-cream container cowl here). You have never seen a foamie model of this size and detail before. It's HUGE! You will need a 3300mAh 4S pack to fly this model well.
I bought the PNF version of this one, but the stock 4S setup does not provide enough power for real 3D. I want to upgrade to a 6cell setup for real 3D performance. Any suggestions for a good motor/prop to get well over 1000w?
I'm very frowning! The package weight is 5337g!!! - the maximal international Airmail segment (5500g)
As comparison the B-17G Flying Fortress EPO (PNF)package is 4300g!!!
ONE KILO LESS for 1600 mm plane!!!
What is wrong and what - true?
Seems HK would get some $ playing with package wights. This is well know way from other china companies.
HI, I have almost finished putting together my kit with a TGY SK 4250-650kV with TGY 85A esc and TGY 4S 3600mAH 30C. I suppose a 14x8 or 15x8 prop would work with the above equipment? Also, do you epoxy the stabilizers & rudders on or do you just use the 2 bolts? The manual is ALMOST unreadably blur.
Thanks for your help.
I just had the maiden flight today. The bolts work fine without any epoxy. The plane flies great. The 15x10 prop flew it quite fast but needed about 70 throttle to prop-hang. Maybe try a 16x6 prop instead.
It is not as gee wiz as the carbon Z, but don't forget the carbon Z may be stiff and strong in bending, there is nowork done to improve the torsional stiffness anywhere on the plane, so from my experience, wher the YAK is much larger, with the wing rod goes almost all the way to the wing tip, it is far better than the carbon Z. I have had so many planes that I come to specify, for 3D ships, even for park flying, 1.3m is the minimum size, but if 1.5m span is available, then forget the smaller on
Thanks. I have the Turnigy 4240 and a couple of other motors that probably could be made to work, but I suspect that the recommended 3720, whatever it is, might be a drop-in installation, and I'll admit that I'm lazy enough to want to avoid having to make modifications.
The motor size they are using appears to be stator diminsions (like some other manufacturers use) which makes the equivelent outside diminsion about 4240.
Though looking at the weight of the plane 2.2 kilos or a little less than 5 pounds the 35-48 isn't going to have enough power for 3d - the Turnigy SK is good for just under 800 watts - probably would be ok to just fly as a sport plane and the SK 4240 is even rated for less. I would say the "right" motor would be the 4250 650 KV SK motor with a large prop for 3d.
I use it with SK 4250 650 KV. It did fit right in the plywood holes, but i bought at a different website. Same model though. Flies very good with this engine. Does all 3D manouverus. Soo should definently have this motor. I use a 14x8 propeller on 4s and 13x8 on 5s batteries. Turnigy 4s 4000mah Nano-tech gives flight time around 7-10 minutes and gives a real nice CG :) (ps. i use turnigy plush 80 amp speed controller, medium timing, normal start)
That's a good choice of motor. I don't own this plane, but I got 3D planes of similar size & weight. IMO, the 3548's are too small & the 50xx's are too big. Ie, the 4250's or the 4260's are ideal for this plane.
i am intrest in tis plane also my choice of motor is SK42-60 500 whit a 80amps esc so i will have power more than enough and esc will stay cooler no ? is this a good choice i find it very dif motor choice
I bought a 42-60 500 & 80A ESC with my kit with the intention of flying with a 6S battery pack. Using the supplied 14x7 prop this combo pulls more than 60A when static (and gives a crazy amount of thrust!) Unfortunately, this is well beyond the 900w rating of the motor but adjusting back the throttle atv to restrict the current draw to 40A still gives an excellent flying performance! So the answer to your question is that yes, the 42-60 500 is a workable choice of motor, (probably better for 5s) but I will probably be buying a TGY AerodriveXp SK Series 42-60 500Kv with my next order for its better power handling rating.
I ordered mine last week and ordered an 5045 kv700 motor. I read in rcgroups people saying 4260 is workable but not too much. I always over dimension power for my planes (I think they suffer less that way) And everyone in the rcgroups agreed that this model uses to be tail-heavy so I hope CG will be nice this way. In a few days I will fly my plane and hope to help everyone that wonders which motor is right.
But now I have another question... What battery do you think is better for this configuration? I am thinking about a 4 or 5s with 3300 mah.
"Better" is very subjective depending on how long you like your flights to last, how aggressively you fly and how deeply you are prepared to discharge your lipos.I am happy with 6s & 3000mAhr which gives 30% battery remaining after 6.5 mins of reasonably aggressive flying. I find that a 135mm long battery is the absolute maximum size that will fit without hacking away foam, so bear that in mind when you make your choice....
thank you for your reply. that is the reason for my choice of 5S I don't want to make too heavy setting and I'm not aggressive with plane,I'm flying rc since last February and my aircraft is an easy glider. Now I am starting to learn 3d manoeuvres and I go step by step. I'll fly sport mode first. This plane seems to be difficult and funny but offers many possibilities.
You will be fine with 5s but be careful to first measure the current taken by the prop/motor combination you choose as I have found that Hobbyking motors tend to have a higher Kv than stated and you do not wand to overload things. The Yak is quite different to an easy glider in many ways and you will have a lot of fun with it!
1 thumbs up!
reu ce yack 54 avec la cl en carbon de l'aile cass en deux,et la queue du modle crase . pourtant le carton d'emballage avait l'air bien alors mfiance car rclamation, mais pas de rsulta beaucoup de travail pour la rparation .chang la cl d'aile avec tube alu de 12
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Type your review here. Try to include as much data as possible. The Yak is verry stable in flight, there are no "bad Manners" at all, so I can recommend this plane to erverybody
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This aircraft is overall quite good, but there is a few issues. It's foam so it dents and scratches really well. Rip that foam landing gear rubbish off or the grass will on your first flight. There was some over spray on mine on the canopy and wing, canopy is easy enough to clean up with some alcohol. I cut about 1-2 cm off the wing spar, and used a little bit of dish detergent on the ends for lube. u will see what i mean when u assemble the wings.
Forget using HK electronics. That's why i bought the kit only version , just read the reveiws on the other or try it if u dont believe.
I have used a Great planes/electrifly rimfire 42-50-800kv(.32) motor,(a perfact fit lenght wise) a scorpion 90 amp ESC (80 amp would be plenty), Lotek servos, metal gear i think would be better. I am currently turning the included 14x7 prop with a 4 cell 4000mah battery which is quite good for the C.O.G. but not so good for the amp draw. Full trottle from a standing start pulls aprox.70 amps.with a cruise of half thottle at about 30amps. I think i will try a 13x6 prop which should have better ground clearance as well as less current draw. should still provide more than enough grunt. U will also need a radio capable of a mix for the 2nd elevator servo or they will work like ailerons!
Also u might want to find a better way to secure the canopy mine came off second flight. I have now
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I have purchased this product from HobbyKing.What a beautiful aircraft is that...Adjust the servo settings then use this beauty as a trainner,sports or acro..what ever you want.I enjoy it very much.Thanks HK for good and fast shipping (also good package).
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Read my review on the ARF version of this bird.
In short, Use Turnigy parts and BEEF this thing up.... ALL parts found here at HK..
G46 60 Plush ESC Voltage Regulator 5S 5000 APC 14x10 prop Zippy 2s Receiver battery OrangeRx R610 w/Satellite Receiver CarbonFiber Landing Gear 160mm (sweep forward NOT back) Tail Wheel System w/Steering & Spring 40-90 size 2 - 9" extensions for wings 1 - 12" "Y" splitter cable for wings 1 - 16" extension for Throttle 2 - BMS 761DMG servos for wings 3 - BMS 661MG HS for rudder and elevators
Place the Receiver and receiver battery in rear of fuselage area. Receiver battery fits snug in the rear opening and satellite receiver can be wedged in the fuselage directly behind cockpit up high where the two halves join. you will need to trim some of the foam under the cockpit and on the fuselage to fit the 5S 5000 batteries. This setup requires you to tape a foam spacer 1" thick to front of battery get the correct CG. Attach a plastic or Tape Pulling handle on the top rear of cockpit..The magnets are really good and hold so tight it is hard to take off cockpit without prying. So put a "tab" helper there.
Great Plane folks.
HEY HK... THIS WORKS...Put 1 together and try one out for yourself..and standby for power and HOT performance