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Brent Good Custom Airframes 106" Yak 54

Old 01-06-2009, 06:41 PM
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Brent G
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Default Brent Good Custom Airframes 106" Yak 54

Greetings everyone.

I am starting a new build thread for my new Yak 54. The laser cut parts should be hear any day and I can't wait to get started. I have sold 1 so far and will be donating one to our local club to raffle off as a fund raiser for new bathrooms at out field. Everyone out there can purchase tickets for this plane. It will be raffled off at our August Giant Scale fly-in. We will be traveling around the Carolinas and Virginia with the plane for people to check out. The plane is being custom built by myself and a few other custom builders in our club. The plane will be given away ready to fly minus batteries, switches and receiver. It will have a 100cc engine (not sure which one at this time). The plane should be great at both 3D and IMAC. I will be competing with the plane this year. We are planning on having the plane at Joe Nall for people to check out. I have ordered all the foam parts from a local source that can CNC hot wire cut them. Here is how I am setting up my plane.

3W 106 competition series
HT 7950TG on rudder
HT 7955Tg Ele and Ail
Ht 225 throttle

JR powersafe system on 2.4

Specs

WS 106"
Length 97"
Wing area 2060 Sq"
Weight (estimated) 26-27 lbs
Wing loading 30oz/sq'

Stay tuned and if you have any questions just chime in!



Old 01-06-2009, 10:11 PM
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Default RE: Brent Good Custom Airframes 106" Yak 54

Hey Brent. Do you have a web site that lists your other kits, prices, specs etc?

Thanks!
Old 01-06-2009, 10:36 PM
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Default RE: Brent Good Custom Airframes 106" Yak 54

Bob

I don't have a web site. I have been thinking about setting one up. I am just a rc nut that likes to design and fly. I started designing when the kits started to go away and everyone was moving to ARF's. I only have the planes cut when I get an order for one. I can't afford to carry an inventory of planes. Right now I have a 50cc and 100cc yak design. I will be working on a 150cc yak and a extra 260 in the future. Once I get this first one built I will have a better idea of a price. I also want to fly one before I sell too many. The guys that are buying them right now have all flown my 50cc version and loved it so much that they said they wanted a 100cc even before the prototype was done.

Here is a picture of the 50cc Yak.

50cc specs

wing span 88"
length 84"
wing area 1520sq"
weight 16.25 lbs to 17.5 lbs depending on the type of balsa sheeting used.
All my planes use sheeted foam wings, stab and rudder.


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Old 01-07-2009, 09:08 PM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

Big Brown Truck just delivered the new plane. Bob Holman did a fantastic job cutting the parts. If any one needs someone to do laser cutting check him out. Top notch work and a very fair price. Here is his web site. http://www.bhplans.com/

Here are some pictures of the parts. I just poped a few out of the cut sheets to test the fit. Only one thing I have found that needs to be changed. The front cowl former needs to be split into 2 more peices. You cant assemble the tunel with the front former the way it is. Just a small issue that is easly taken care of. I need to lay out all the parts and figure out what order thing will need to be assembled in. I have a pretty good idea but theory and practice can be 2 different things.

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Old 01-07-2009, 09:21 PM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

More pictures
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Old 01-08-2009, 10:49 PM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

Well here is what you can get done in 5 hours. I will start putting the pictues in with the instructions when I am not so tired.

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Old 01-10-2009, 03:12 PM
  #7  
Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

Well I am almost as far as I can go until I get the foam parts. I am very happy with the way everyting fits. There are no gaps and the whole structure is self supporting. Everything interlocks together great. Everything is assempled dry and some thin CA is wicked in the seams. On high stress area I use some medium CA and kicker to make a fillet. Here are some pictues.
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Old 01-13-2009, 06:24 PM
  #8  
Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

Well I better get started on how to build this plane.

Start by removing all the parts from the cut sheets. The nibs (small sections that are not cut so the parts dont fall out of the sheets) need to be trimed. If they are left sticking up they can cause the parts to not fit flush. Glue together the 3 side peices that make up the fuse sides. The 2 1/4" thick front sections are marked left and right. The left side is a little longer to get the proper right thrust. Lay the part lettering side down. Glue the center fuse side section and rear fuse side section. Where they join there is a letter. Just match up the letters. A to A, B to B etc. Use a long straight edge along the fuse side peices to make sure that everything is straight.

Glue the fuse top and bottom together next. The rear top fuse section has a line engraved with .5 degrees of right in the vertival fin.

Glue together the stab tube support box. This all interlocks together. Just match up the letters a-a, b-b, etc. I used thin ca wicked into the seams after the peice is snapped together.

Glue in the the 1/4" rotation pin and wing bolt doublers. It takes 4 per fuse side. I use a 1/4" dowl to line up the doubler with the hole. Each doubler is 1" in diameter with a 1/4" hole.

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Old 01-13-2009, 06:32 PM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

Next is the wing tube doubler. The doubler has tabs on both sides one set is 1/4" that goes into the slots on the fuse sides the other are 1/8" that go into the doubler. Use a little wood glue in the slots on the fuse side. Put the doubler sides in the slots and glue the doubler to the side spacers. Square it up with the fuse side and lock it into place with a little ca and kicker.

If you are going to mount the rudder servo in the tail You will need to glue in the rudder servo mount doubler.
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Old 01-18-2009, 12:43 PM
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Default RE: Brent Good Custom Airframes 106" Yak 54


ORIGINAL: Brent G

Bob

I don't have a web site. I have been thinking about setting one up. I am just a rc nut that likes to design and fly. I started designing when the kits started to go away and everyone was moving to ARF's. I only have the planes cut when I get an order for one. I can't afford to carry an inventory of planes. Right now I have a 50cc and 100cc yak design. I will be working on a 150cc yak and a extra 260 in the future. Once I get this first one built I will have a better idea of a price. I also want to fly one before I sell too many. The guys that are buying them right now have all flown my 50cc version and loved it so much that they said they wanted a 100cc even before the prototype was done.

Here is a picture of the 50cc Yak.

50cc specs

wing span 88"
length 84"
wing area 1520sq"
weight 16.25 lbs to 17.5 lbs depending on the type of balsa sheeting used.
All my planes use sheeted foam wings, stab and rudder.


O.K. guys.here is a fella that has designed , built, and flown his own Yak. Just look at it..very very good job I think. But more important is we may have a U>S> builder/supplier of these mostly Chinese type of planes. If all parts are lazer cut then it would be a no brainer to "snap" one togeather in short order. And we would then be taking some of the busniess away form the Chinese and back to our shores..............Help support this guy.......buy some of his raffel tickets
Old 01-18-2009, 05:01 PM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

SoCalSal

Thanks for the kind words. I would really like to see more people building kits. Those that don't are missing out on a big part of this hobby. Today I started building my plug for the Cowl mold. Messy process! Here are some pictures.

PS. If any one would be interested in raffle tickets they can send me a PM and I will keep them on file for when we start selling them. I have the Fuse for the plane that we are giving away just about framed up. The CNC foam cutter that I will be using is waiting on a chip for their cutter to arrive from Poland. Once they have that I will get the foam cut and start the vacumme bag sheeting on all the parts.

Once again the proceeds from the plane raffle are going to help pay for new bathroom for out local RC club, York County Flyers.

http://yorkcountyflyers.com/



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Old 01-19-2009, 09:16 AM
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Default RE: Brent Good Custom Airframes 106" Yak 54

Brent;
You're my kinda guy[sm=thumbup.gif]. I am a scratch builder myself and I know what it takes to design and build your own stuff. You venture out on the limb when you start designing, because you never know whether or not the end result will work out the way you have planned it. What I have seen so far in your posted pictures tells me enough about your skills. Keep up your great work and post as many pictures as possible. Where in Virginia have you planned stopping by?
Old 01-19-2009, 10:16 AM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

Thanks!

I fly with my younger brother up there. He is a SEAL at Little Creek Amphibous. He flies at the Hampton Rhodes RC club. We also go out to Fentrus in Virginia Beach every now and then. That should be pretty close to you. I am also hoping to hit a IMAC event or 2 in VA. Where do you fly and what events does you club have going on. If my schedule permits I would like to get up there to show the plane at other events. What I am really trying to do is raise as much money for my club as possible. I am the President of our club and we have set some pretty high goals for the year. This flying season I am trying to acomplish several things. First is promote RC flying and building, (It doesn't matter if it is one of my designs or not). ARF's have done a great job of bringing more people into the hobby but there is a cost. We are loosing our skill base of people that can build or design. The next thing I want to accomplish is promote our club, increase membership and attendence at our events and raise money for the field imporvments. The final thing is promote my designs. This is also the order of importance. I enjoy designing and building but have no illusion of making much money with my planes. Unfortunatly with out a larger kit manufacturer stepping up the prices on my kits probably won't be as low as I would like. It is simply a numbers game. I can't have a 1000 kits cut at a time. I would love to have guys that are excited about building and flying get one of my planes. Who knows this thing might grow. I am just a little farmboy and machinist from Wyoming that moved to the south. Very few people know about me and my designs, but that is changing!

Hope to meet you guys, maybe I will see some of you at JOE NALL, I will be there how about YOU!

Old 01-19-2009, 12:25 PM
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Default RE: Brent Good Custom Airframes 106" Yak 54

Brent;
Yes, we fly at FENTRESS all the time, although I am a member of TRC (Tidewater RC). Would be great to have you as a guest pilot here this coming spring. I 'd love to see your planes fly. I will be following your thread from now on.
Old 01-19-2009, 12:40 PM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

I never can remember how to spell Fentress. Where is the Tidewater RC. Does Tidewater RC do any IMAC events? Do you guys have a website. Would you ro your club be interested in some tickets for the 100cc Yak we are giving away? You don't have to be present to win but we would love to have you as our guest at our giant scale event in August.
Old 01-19-2009, 02:33 PM
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Default RE: Brent Good Custom Airframes 106" Yak 54


ORIGINAL: Brent G

I never can remember how to spell Fentress. Where is the Tidewater RC. Does Tidewater RC do any IMAC events? Do you guys have a website. Would you ro your club be interested in some tickets for the 100cc Yak we are giving away? You don't have to be present to win but we would love to have you as our guest at our giant scale event in August.
Our website is http://www.flytrc.com/. We have a great field in Chesapeake, Va, off Ballahack Rd. Please contact our president (Russ Schaffer). I don't want to speak for him regarding any tickets. We host the East Coast Jet Rally first week in May each year. Even though it's not IMAC it's a great event. Other than that we have several non-official events throughout the year.
Old 01-20-2009, 10:39 AM
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Default RE: Brent Good Custom Airframes 106" Yak 54

Brent

Looks good so far.....

As most of you now know if you read thru the thread this is a project to help our club. We are going to make our club a little more family friendly. I think I can speak on behalf of Brent here as this is something our club sees as a plus to get more people out to the field. We want to make it as family friendly as possible.

I joined this club 5 years ago when I first moved to the area. Brent is one of the guys who is a great builder. I envy his talent. He and another fellow Holland cut foam cores and sheet models all the time. Brents YAKS have proven themselves. They fly great.

So look for this plane in the future at events around the area.

Thanks guys

Jeff Carr
Old 01-20-2009, 06:10 PM
  #18  
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Default RE: Brent Good Custom Airframes 106" Yak 54

always good to see someone who likes to make sure kits are available othe rthan artf, cant beat spending the winter building planes from mear boxes of wood and not prebuilt rubish thats badly built. keep up the good work how much are the kits then

Brent
Old 01-20-2009, 07:32 PM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

The kit price has not yet been determined. It will all depend on how complete I make the kit. Here are some rough numbers. The fuse and all the light ply laser cut parts should be around $200. All the foam cores (wings, stab, rudder, turtle deck and hatch) $150 est. Cowl $45-$50. Canopy $50?. A guy could then buy all the sheeting, wing and stab tubes and sockets, landing gear and hardware on their own. That would save on freight. If I have to order all the peices and have them sent to me to box up, I would then have to add that freight plus the cost to ship it out. The laser cut parts I can have drop shipped form my laser cutter directly to you.

I don't want to sell any more until I have this first one built and flown. You never know if there are somethings that need to be changed. I have a couple of small things I need to change on the drawings. I also need to give a little more clearance in the tabs on the fuse sides. I drew up everything with 0.000 clearance and depended on the laser kerf for clearance. The tabs at the rear of the fuse were very tight. because of that when I unclamped the fuse I noticed a small twist in the fuse, .25 degrees in the last 12 inches. Every thing fit together too tight and caused the twist. It is no big problem, I will sand the stab tube holes just a little and that will fix the problem. I just don't want the guys that buy this plane to have the same issue. An extra .015" clearance in the slots should be plenty.

I just finished fiberglassing the plug and have it in the vaccume bag. It is kind of cold in my garage so it will probably be kind of slow curing. I left my camera at work so I won't have any pictures of the plug until tomorrow.

Old 01-21-2009, 06:29 PM
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Default RE: Brent Good Custom Airframes 106" Yak 54

I pulled the plug out of the vacumme bag. It turned out pretty good. There were a few ridges of resin that got pushed up. This happend because I didn't have any peel ply. I wraped the wetted plug with cling film and pulled the vacumme. The ridges will sand off easly in the lathe. I didn't find any pin holes or areas of dry lay up. I am very happy about that. Bagging realy helps this process.

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Old 01-22-2009, 11:45 AM
  #21  
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Default RE: Brent Good Custom Airframes 106" Yak 54


3W 106 competition series
HT 7950TG on rudder
HT 7955Tg Ele and Ail
Ht 225 throttle
Not familiar with HT7950TG. Do you mean 7955TG? I'm assuming you are using two of the 333 oz. in. servos on rudder and two servos per wing? Airwayman
Old 01-22-2009, 12:02 PM
  #22  
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Default RE: Brent Good Custom Airframes 106" Yak 54

subscribing, the wing looks very unproportionate to the rest of the plane, but maybe just the angle of the pic?
Old 01-22-2009, 12:07 PM
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Default RE: Brent Good Custom Airframes 106" Yak 54


ORIGINAL: airwayman


3W 106 competition series
HT 7950TG on rudder
HT 7955Tg Ele and Ail
Ht 225 throttle
Not familiar with HT7950TG. Do you mean 7955TG? I'm assuming you are using two of the 333 oz. in. servos on rudder and two servos per wing? Airwayman

The 7950 is due to be released very soon
http://www.hitecrcd.com/servos/show?name=HS-7950TG

400 plus oz at 6v
Old 01-22-2009, 08:14 PM
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Brent G
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Default RE: Brent Good Custom Airframes 106" Yak 54

John

The 50cc version is a little our of proportion. The fuse needs to be bigger in diameter to be closer to scale. I designed it around a cowl that I already had. The 100cc was drawn over a scaled down drawing of a full size yak that is very true to scale. There are only a few changes form the full scale. Stab placement, airfoil and wing design were the bigest changes from full scale. The new plane is well within the 10% rule for IMAC.

Old 01-22-2009, 08:17 PM
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Default RE: Brent Good Custom Airframes 106" Yak 54

I am planning on running one of the new HT7950TG (400+ oz servo) for the rudder. I could get away with running 1 per aileron but I will be using 2 for strength and precision. I am planning on setting this plane up primarily for IMAC.

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