Brent Good Custom Airframes 106" Yak 54

[Brent G]

I don't have a copywrite on the scheme so I don't know why not. You can get the vinyl from Dennis Kirby. Tell him it is for my 106" Yak. I do need to tell Dennis that the elevators checkers need to be a little longer. I had to hand cut an additional check to get to the trailing edge.

[Brent G]

Here are some pics of the Prototype I took to Joe Nall.

The uncoverd plane in the background is the one we are giving away. The pics a few posts back is the way it looks now!

[Brent G]

Thanks again to everyone who purchased tickets for the Yak. We had the drawing and the winner is TJ Rohyens from Mobile, Alabama. He purchased the tickets at the 2009 Joe Nall.
Keep watching for more info on the plane and the 150cc version that I am planning on drawing this winter.

[N726AC]

Congrats to TJ Rohyens !!
Hey Brent, you gonna raffle the 150cc at Nall 2010 ??

[Brent G]

I don't think we will be raffleing off a 150 size plane. That is a huge investment in time and money! Our club ended up making around $800 for the bathroom project with this raffle. The biggest issue that guys had with purchasing tickets was the physical size of the plane. A lot of the people just didn't have a way to transport a plane that big. We might be giving away on of my 50cc planes next year. I am starting to make a few more changes to the 100cc yak. I am planning on changing the hinging to a pocket hinge design.

Tony one other thing, shoot me a pm I have something I would like to visit with you about outside the forum.

[Brent G]

Hello everyone! I just wanted to pass along that TJ want's to sell the yak he won. He doesn't have room for a plane that size. We would like to get the plane sold and out of the shop where it is being stored as soon as possible. If anyone would like to make an offer shoot me a pm and I will pass along TJ's contact info. Who ever buys it is responsible for arranging to pick it up or having it shipped. The plane is currently at a freinds shop in Rock Hill, SC.

Just let me know.

[rcpilot82]

Guess I don't have the lucky ticket eh, would have liked this one. Oh Well.

[N726AC]

$9.83,,, ???

[rcpilot82]

$20.00 and I'll cover the shipping

[Brent G]

:Banane20:You guys are funny

I think he will be asking for a little more than that.

[Jerry_Hailey]

I'm glad TJ was willing to part with this plane. I'm the new owner, so I will post the progress of the Brent Good Yak 106.

Brent did an excellent gob on this plane. The construction is solid and the finish work top quality.

I started by checking the CG so I could mount the batteries in the best location. It turned out that the CG was spot on, so I centered the batteries and receiver. I had a little trouble getting the carburetor to pull in fuel. I ended up pulling the pump membrane out and found it was dry and stuck. It was not a big deal to put a little CRC556 on the needle and get the DLE111 to fire up. Big Power! I am very pleased with the power of this engine. I started out two turns on the High and Low adjustments. After a few minutes to get the engine warm I started leaning out the top first. I ended up back at 1 ¾ out on the High and 1 ½ on the low. The throttle response is excellent, I have no hesitation at all from idle to full throttle. It has a very smooth rpm transition even when opening the throttle very slow to hit every click of the transmitter one at a time.

I have a DX7 2.4g transmitter that I have installed. I used an amp meter to balance all of the servos for the lowest amp draw. The servo-match from Spectrum is a nice feature. All of the servos work smooth and in sync.

I got to the field at 6 pm, just when it was nice out, 72 degrees and a light wind from the south. The needle valve settings were off a bit when I first started the engine. I have only ran one full tank of fuel, so I’m not surprised that it changed from the day before. I adjusted a couple of times with the cowl on, but I couldn’t tell where the needle valves were so I pulled of the cowl to tune the engine.
With the cowl off I started just running up and down the runway just to put some time on the engine. That was the plan but I ended up nailing the throttle and lifting off. One click of aileron and two clicks of elevator and she was in trim. I fliped over to a knife edge and flew the length of the field. It tracked straight, and steady. I went over to inverted and could fly at 1/16 throttle and hands off the controls. My next test was to se what the stall speed was, this didn’t work. It doesn’t have a stall speed! It floats like a foamy. I flew around a while doing some basic stuff, stall turn, roll inverted snap rolls and such to get a feel for the plane. I pulled up into a hover and was pleased with how stable it was. Oh yea, ¼ throttle will hover. That DLE111 is a ton of power for this plane. I did a few landings and they all came in light and slow. Then the engine went dead stick. I had the needles to rich and loaded it up. Anyway, without the wind from the prop it is a whole different airplane. I was down wind going away from the runway at about tree top altitude. I turned to the right and dove as best I could but my airspeed was a little slow, so she sat down a little hard but square on the landing gear. No damage other than a little bent landing gear and my pride. The landing gear did its job and took the blow and kept the airframe in tact. This is one sweet plane. Good Job Brent Good Custom Airframes.

[Brent G]

Jerry

Great to hear that you had a successfull maiden flight. The more you fly the plane the more you will find out that there isn't anything you can't ask it to do.

I have an update on kits. I have been in contact with a kit manufacture and he said he would like to market my designs. I can't go into too much detail at this time because we are just getting started talking about copyrights and royalties. I am just about done with the changes to the design. I have corrected some of the small alignment and clearance issues. I have also extended the tunnel to accept tuned pipes and streched the fuse 2". I have also done a little more lightning work. I decided to not go with the pocket hinges. I am only used to working with 2D cad. It is just a real headache to try to figure out the pocket hinges. It also looked like it would end up adding a little weight. So I decided to not go that route. I have also made the mold for the canopy's. I just need to make the plug and then I will be able to vacume form the canopy's. I should be ready to offer kits for this winters building season. I don't have a price yet but that will come once we get things all worked out. I will be doing a complete build thread on the plane as well as making detaild construction instructions for the kit. Keep checking in to see how things are progressing. If anyone is interested in a kit let me know so we can get an idea of how may to start thinking about. I will also be starting work on the 150cc yak as well. I will probably build the plane and have someone else put their equipment in it and do the testing. I will be looking for an unlimited IMAC pilot in my area to do this.

[mmikeny]

hi brent
i would be interested in this kit send me a pm when you get it all finished with price thanks mike

[Brent G]

I will let you know when things are getting close. Thanks for the interest. I hope you end up building one of these planes. She's a HONEY!

[Jerry_Hailey]

I just had another great day at the field with the 106" Yak.

I moved the fuel tank forward two inches to get the CG more where I like to fly. I know the CG will change as the fuel goes down, but for now I'm getting a feel for where I need the balance. Just FYI it is hands off inverted and flies level. I like a little drop inverted.

That DLE111 is staring to break in now. I took a short cut and only ran a couple of tanks of fuel and took to the air to break-in in-flight. I should have read the manual first, but it's all good.