Magic Hand RC 73" Yak build thread

[nitrobeast]

I was thinking about using a 26cc. I friends dad is gonna use a 26cc. Im gonna wait and see how it is with the 26cc and then decide. Yesterday I won a OS 160 with a bcm pitts muffler and pump on ebay for $175. If i decide on the 26cc i can always get my money back for this engine.

I will get my scale out later and check your numbers. My friends number came in a little less then yours.

maine nice work by the way. Keep it coming

[maineflyer]

Let me know what you come up with fro numbers. I weighed mine on a digital scale but will check it on a different one once it is done.
Jeff

[nitrobeast]

Here is the stuff i checked. The number are close except for the wingtube and cowl

Your numbers
Right Wing 15.7 oz
Left Wing 15.7 oz
Hor Stab 6.5 oz
Rudder 3.5 oz
Fuse 39.0 oz
Cowl 7.1 oz
Gear 6.2 oz
Wing tube 9.0 oz
Hardware 8.6 oz
spats 1.6 oz

My numbers
Right Wing 15.7 oz
Left Wing 15.7 oz
Hor Stab and elevators 6.6oz
Rudder 3.2 oz
Fuse, canopy and tank 38.6 oz
Cowl 8.1 oz
Gear 5.9 oz
Wing tube 4.4 oz
spats 1.6 oz

[maineflyer]

Wow big difference on the wing tube. I will re-weigh mine.
Jeff

[nitrobeast]

What size spinner is that in your pic?

[maineflyer]

Nitro,
That is a 3" from Extreme flight, I think it could use upto a 3 1/2" spinner though. I bought it to go on the EF Yak but will use it on the Magic Hand. Hopefully it will hold up to the OS 1.60. I have a Aluminum P51 3 1/2" Tru-Turn that I use on the EF now.
Jeff

[maineflyer]

Horizontal stab:
I installed the horizontal stab this morning. I have attached some pictures of how it went.
First I cut the covering from the stab opening and also the elevator servo bays. I then dry fit the stab and measured equi-distance out from the fuse at the rear of the stab. I also mark the center line of the fuse at the front and drive a T-pin in with a string attached and measure the distance from there to the stab tip to make sure they are equal. I then traced the outer edge of the fuse opening and pulled the stab out. Using an older soldering gun in trimmed off the utracote leaving 1/8" on the inside. I refit the stab and checked the angles I then leveled the fuse both laterally and longitudinally. Once I had a level on the canopy opening I checked the incidence of the stab. Once satisfied I mixed up some 20 minute epoxy and glued it in place, rechecking all the angles.
The only issue I had is the incidence changed once the epoxy dried from 0 to -1 approx. I was a little bummed because I wanted 0 across the board and there is really no way to tear it all apart to change it. So I will make the best of it. (I am only assuming 0 is correct as there are no incidences in the manual) Note: the stab opening is big and there is some space that will need to be filled. Once I had the stab in place I put a small amount of thin CA in the front to hold it in place.
Jeff

[maineflyer]

Rudder and Control Horns:
I finished up the tail group tonight by putting on the horns and the Rudder. This is pretty straight forward but there are no real directions with the plane so it is (shoot from the hip)... Sorta. I put a servo in the bay for the elevator and lined it up with the surface to get a point where the linkage wouldn't bind. It worked out to be about 1/2" from the inner edge of the flying surface. I then set the horns for the elevators so that the connection is directly over the hinge line. Due to the short length of the horn part of the washer was in the hinge line and restricted travel so I used the trusty Dremel tool to trim them. I am now getting 55+ degrees of travel both ways. I then trimmed the post to a reasonable length for the elevators and they were done other than sealing the hinge lines...
I then turned my attention to the rudder. I opened up the pull/pull exit holes in the fuse and stuck some carbon fiber rods in to see where they would intersect the rudder (note the 67" instructions say 135mm). I felt the rudder and this measurement is at the lowest end of the mounting block on mine ... thus the carbon fiber rods. I also ran a straight edge from the rudder servo bay to double check my measurement. It ended up being in the 155-160mm ballpark. I mounted the horn in the usual fashion. (always hardening the post holes with thin CA). Once the horns and posts were on I fit the rudder and walked the CA to the hinges. (I really wish this plane came with hinge points). This rudder is huge and I would feel much better with points. I then sealed the hinge line with some clear Monocote and the rudder tis done!!
Enjoy the pics!
Jeff

[jrjohn]

Thats a beautiful plane, and the price is right too

[maineflyer]

jrjohn,
It is a great deal for the price. There are a few things I would change. The hardware could be improved but most people have there personal favorites in that department I would like to see a carbon fiber wing tube and some better fuel line but everything else is very nice.
Jeff

[maineflyer]

I just pulled the trigger on a battery
I bought an 2300 ma A123 pack and Cell Pro charger from Sin City Jets for this plane. It weighs in under 6 oz. and will give me plenty of juice for at least 4-5 flights with the digital servos without any low voltage issues.
Jeff

[nitrobeast]

Im gonna use those cells too. All i need is the dapter they have and use my triton to charge it.
I almost have everything i need now. I need some servo extensions and some harware and im good to go.

[maineflyer]

I am going to make my extentions custom to the plane. I was going to cut the leads on the servos but decided to leave them and build extentions and then tape and seal them with shrink wrap for the wings. I will then put like 3-5" extentions coming out of the receiver to hook the wings up. Put some pics of your plane on. I would love to see it.
Jeff

[nitrobeast]

	Quote: Originally Posted by maineflyer
	I am going to make my extentions custom to the plane. I was going to cut the leads on the servos but decided to leave them and build extentions and then tape and seal them with shrink wrap for the wings. I will then put like 3-5" extentions coming out of the receiver to hook the wings up. Put some pics of your plane on. I would love to see it. Jeff

Nothing special about mine. All i have done is assemble the rear and install the rudder servo. I set a rule for myself. Must finish projects before starting another..lol
I should start going at it next week full force.
I just finished converting a quique 49" electric yak to NITRO power, ohhh yeah .I put on a 32sx, and the plane weight is about 3-4 pounds...should be lots of fun

[maineflyer]

I don't blame you. I have 2 more projects waiting (EF Yak & Ultra RC Katana) and 2 to be maidened this spring. Time ot slow down building and fly some Have a great weekend!!