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Old 02-15-2009, 09:37 PM   #1
rcbirk21
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Default Magic Hand Yak 55 50cc Build and Fly

Hey guys, I just started on a really interesting new plane today, the Magic Hand Yak 55 from troybuiltmodels.com. Big thanks to John Dunlap over there at troy built!

http://www.troybuiltmodels.com/items/MHYAK55-89.html

This plane sure seems like it will be a great flyer. Here is what I plan to put in it:

Engine: Undecided (looking for a good 50cc twin, either aerovate 50cc or 3w-56i b2)
Servos: HS-7955TG all the way around
Prop: Xoar 23 x 8 eaglenose carbon fiber tipped prop
Extras: Skywriter smoke system, eventually a night-flyer spotlight effect system
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Old 02-15-2009, 09:52 PM   #2
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Default Re: Magic Hand Yak 55 50cc Build and Fly

First I want to give a very big thank you to the guys at troy built or at magic hand for the superb packing job on this plane. There was no way that anything was going to be damaged in this packing. Ok, first thing is that there is no manual included in the box, but no big deal. Troy built has a pdf file on their website under the plane's info so that you can print it.

Upon first inspection, I am extremely impressed with the build quality of this plane. The covering is top notch. The painting on the (huge) cowl is perfect. Plenty of space inside the fuse to put two tanks (one for smoke and one for gas). The first dissapointment is that there is no easy way to modify the servo tray to put a quarter scale in for the rudder. Not the end of the world, just dissapointing (especially with the beautiful metal rudder pull pull servo arm included in the hardware, pictured below). Another nice feature of this fuselage is that the turtle deck is foam sheeted. I love that, and only wish they did the same for the bottom of the fuse. I am not a big fan of stringers on the bottom of the fuse, but it is something I can learn to live with. Also, the vertical stabilizer is pre-installed, which is definately nice. Included is a carbon fiber wing and stab tube, very nice touch. There is also a carbon fiber tail wheel mount, very nice. Comes with what looks like a decent fuel tank. The landing gear seems to be VERY sturdy, and it is even painted yellow to match the plane.

The biggest thing about this plane that I love is the holes for the pivot hinges are pre-cut and lined up perfectly. I can not emphasis how much time and headaches that saves. Magic hand also includes wheel spats instead of wheel pants, which I personally think is a very nice touch.

I ran into a small problem in the engine choice. I am leaning more towards the aerovate 50cc twin because it has its spark plugs angled on top of the cylinder heads, which allows that engine to just barely fit in the cowl of this plane without having to be cut. The 3W-56i b2 is about 2 or 3 cm too big to fit in the cowl, which means I would have to cut some oblong holes on either side of the cowl to make them fit. Still debating on whether or not it is worth it. I emailed Henry at zrcgf and he said that they have just finished renovating that aerovate 50cc twin, and says it has at least 95% if not more of the horsepower of the 50cc single, so we would be looking right around 5 or 5.1 hp and somewhere around 300-400 grams lighter than the 3w-56i b2.

So far, this plane looks HIGHLY prefabricated and should go together in no time.
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Old 02-15-2009, 09:53 PM   #3
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Default Re: Magic Hand Yak 55 50cc Build and Fly

I just glued all of the hinges tonight. I decided to use gorilla clear glue instead of the recommended epoxy. The gorilla glue expands, and the hinges seemed to fit pretty losely in the predrilled holes, so I wanted to make sure they stay in there nice and tight. I found the hinges did not completely match up with each other, but shouldn't be any big deal, just make sure you check all of the hinges before you actually glue them in to make sure they aren't fractured or broken.

Also, if using gorilla glue, or any other glue for that matter, double check to make sure all the gaps are as small as you can get without restricting travel. Also clear all the glue to make sure the glue doesn't glue the surfaces themselves.

So far, I am not floored by the quality of the hardware. I haven't gotten into the servo linkage hardware to test it out yet, but it definately seems to be very robust.
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Old 02-18-2009, 06:54 PM   #4
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Default Re: Magic Hand Yak 55 50cc Build and Fly

I was working on the yak again tonite, decided to get all of the landing gear mounted. Tail wheel bracket itself is very nice, but the hardware with it is not the greatest quaility. Also, the main landing gear had a slight problem. First off, the landing gear did not fit in the pre-made mount hole, so I had to grind it down around 1/8-1/6 in to get it to fit. Then, this plane has a reinforced landing gear mount with aluminum brackets, which make the landing gear mount much stronger than some of the older magic hand yaks. But it was not pre-drilled through the aluminum, so I had to redrill that out using a 5/32 drill bit. I will post pictures as soon as I can. Plane is coming together very nice, I am still very impressed.
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Old 02-18-2009, 07:17 PM   #5
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Default Re: Magic Hand Yak 55 50cc Build and Fly

Sweet plane,looks good!
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Old 02-20-2009, 05:35 PM   #6
rcbirk21
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Default Re: Magic Hand Yak 55 50cc Build and Fly

Thanks jdmunns

Slid everything together to get some semi-finished pics. I also will post the two problems I had with the main gear. The first picture is where I had to grind the gear to fit. You can see where the yellow is gone and is replaced by the original silver aluminum color. the Second is of the part I had to drill to get the landing gear bolts through the mount. I have already talked to John at TBM and he said he is passing the info along to Magic Hand, so this problem should get fixed. It really isn't a huge problem, can be taken care of in about an hour or so. Well, here are the pics. Enjoy
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Old 02-20-2009, 05:36 PM   #7
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Default Re: Magic Hand Yak 55 50cc Build and Fly

I also forgot to mention that this plane is canister ready. You can see in the second picture that it is pre-cutout for canisters, you would just have to cut through the cowl like normal to stick the exhaust out.
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Old 02-25-2009, 05:58 PM   #8
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Default Re: Magic Hand Yak 55 50cc Build and Fly

Just got the engine in the mail today. Decided to go with the 3w-55i-US competition series from Gerhard at Aircraft Int'l. I got some pictures of the purrrrdy engine as well. Will be a couple of weeks before he gets the pitts muffler in stock for it.
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Old 03-01-2009, 08:56 AM   #9
CHICKENHAWK61
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Default Re: Magic Hand Yak 55 50cc Build and Fly

Another nice feature of this fuselage is that the turtle deck is foam sheeted. I love that, and only wish they did the same for the bottom of the fuse.

Are the wings/stab foam sheeted or built up?
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Old 03-02-2009, 05:04 PM   #10
rcbirk21
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Default Re: Magic Hand Yak 55 50cc Build and Fly

The wings/stabs are unfortunately built up. I complete agree with you about the bottom of the fuse. I bought a seasoned 29% aeroworks edge 540 from a professional builder who had taken the liberty to foam sheet the turtledeck, bottom of the fuse, wings, stabs, as well as the hatch. I have to say that it spoiled me too much. I keep wanting to pick the plane up by the bottom of the fuse. I had actually mentioned the foam sheeting to knox hobbies on a different post where they were asking for ideas for their new line of giant scale arfs, but they did not really respond to it.


Is that a pic of the magic hand 85cc geebee?
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Old 03-05-2009, 07:09 AM   #11
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Default Re: Magic Hand Yak 55 50cc Build and Fly

No sir....it is the PACIFIC AERO 27% GEE BEE Y. This picture came from RCU review by Mr. Dick Pettit. I have one NIB in the black/yellow scheme. I am trying to decide what engine I am going to use. Mr. Pettit's review model is powered with a G62.
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Old 03-06-2009, 01:30 PM   #12
rcbirk21
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Default Re: Magic Hand Yak 55 50cc Build and Fly

If I may make a suggestion, there are a few good "cheap" engine choices. RCGF (zrcgf.com) has both a 50cc and a 65cc engines that seem to be getting rave reviews. They are extremely reliable, so that may be a good choice. They also have a 50cc twin I have been wanting to try out, and that may be the perfect plane to do it on.
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Old 03-06-2009, 11:44 PM   #13
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Default Re: Magic Hand Yak 55 50cc Build and Fly

Just an FYI.. Drilling through the aluminum angle stock that supports the gear is fairly standard practice.
90% of the ARF's I've built leave that area un-drilled. that way if the gear were drilled even a little off, it allows you to simply dril the first set of holes into the gear plate.
Again.. just an FYI.
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Old 03-08-2009, 05:20 PM   #14
rcbirk21
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Default Re: Magic Hand Yak 55 50cc Build and Fly

Well, then I guess this plane is just that much better .

Over the past couple of days I have been working on the engine mount. I made some of my own standoffs with a hole saw and a sheet of plywood. Just glued them together and laminated them. Have around 1/4 inch clearance from the prop to the front of the cowl. I also got a few of the triangle stock pieces glued around the firewall. Be careful, some of them are not 90 degrees and need to be sanded down to get them to 90. I just used a disc sander. So far it is all going smoothly, just using some clamps to hold on the triangle stock while the 30 minute epoxy hardens. I have some pics that should help explain a little bit.
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Old 03-25-2009, 05:53 PM   #15
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Default Re: Magic Hand Yak 55 50cc Build and Fly

Sorry, it took me a while to get some more work done. Got the firewall almost finished. I am absolutely astonished with how strong it is. Ive heard about alot of other planes with their only weak point being the firewall, but with this plane it is absolutely not the case!
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