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Midwest Extra 300xs Build

Old 12-15-2005, 10:21 AM
  #126  
foots7
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Default RE: Midwest Extra 300xs Build

ahhh nice....when will we expect to see this at the field...........DONT LET RICK FLY IT.
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Old 12-15-2005, 05:48 PM
  #127  
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Default RE: Midwest Extra 300xs Build

Thanks Cyberwolf and foots, I checked for twists and the like just eyeballing but I don't own an incidence meter, yet. How can I do this with a level and t-pins? I might do this on the other half of the wing anyway. You're right about this build though, it has been fairly smooth so far, and I am just about done with the framing. I have a SIG Hog Bipe kit that I recently purchased at the club swap meet. Don't know if I'de trade though, LOL, it looks like a pretty nice kit. Good luck with the Corsair.

ORIGINAL: foots7

ahhh nice....when will we expect to see this at the field...........DONT LET RICK FLY IT.
Hey foots,
Are you at the field at Powers Crossroads? I have never been there but I might give it a try as I do live in Newnan. I currently drive to Griffin to fly and we have a pretty nice field but I heard you guys had a nice one too. Anyway, Who is RICK?? and what is wrong with him??[sm=confused.gif][sm=confused.gif]
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Old 12-15-2005, 09:28 PM
  #128  
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Default RE: Midwest Extra 300xs Build

A Little bit more build time this evening and I am almost done with the first half of the wing. After installing the aileron wire tube(rolled paper), I glued on the trailing edge sheeting. I continued with the leading edge, wing tip and center section sheeting. I will have a little sanding to do on the seams and ends before completing.
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Old 12-15-2005, 09:35 PM
  #129  
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Default RE: Midwest Extra 300xs Build

Next I glued the 1/4" wing tip balsa in place and while the glue was drying I cut a 1/2" hole at the base in line with the wire tube(last picture). I then sanded the tip balsa to the general shape of the end of the wing.
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Old 12-15-2005, 09:46 PM
  #130  
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Default RE: Midwest Extra 300xs Build

The next step is shaping the leading edge. I used a power planer to remove most of the material. I had the depth set very shallow so It wouldn't gouge the wood and made several passes to get to about 1/16" from the wing surface. The rest was sanded off with a bar sander and shaped roughly to the shape desired until after the wing halves are joined. I will finish shaping the entire leading edge at that point.
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Old 12-15-2005, 09:46 PM
  #131  
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Default RE: Midwest Extra 300xs Build

yes ivs been to the field in newnan about four times...im a newb.
rick is the one thats been training me and my brother.
he is a awsome flyer and the coment was a joke due to the 3 planes he crashed sunday none of which was his fault.
there are some nice guys there and a 300ft concrete landing strip.
ill post some better pics of the field when i go back
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Old 12-15-2005, 10:02 PM
  #132  
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Default RE: Midwest Extra 300xs Build

I Then marked a line on both sides of the wing at the aileron hinge line for the aileron cutout. The horizontal line is between the wing trailing edge balsa spars and the aileron leading edge balsa spars. Next, I used a hobby knife to cut the sheeting on the line across the wing to the tip on both sides. I then used the razor saw to cut the balsa wing tip at the aileron hinge line. Cutting through the ribs, I needed a flush cut razor saw. This was not difficult but it was tedious. Being careful I completed cutting the ribs and the sheeting down rib 7 between the A1 aileron cap and that was glued in earlier and rib 7. The last pic shows the results. their is about a 1/4" of balsa and ribs left to be sanded flush with the spars on both the wing and the aileron. Got to this point and decided to call it quits for the night.
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Old 12-15-2005, 10:15 PM
  #133  
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Default RE: Midwest Extra 300xs Build

One of the guys I know that does fly over there is in the hobby shop in downtown Newnan. Great guy, I always get a good price when in there. I hope to get over to Powers crossroads field some time in the near future, maybe I will see you there.
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Old 12-20-2005, 03:09 PM
  #134  
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Default RE: Midwest Extra 300xs Build

Looking great ,it wont be long now .
What I used to do before the days of incidence meters was to measure the end of the trailing edge and mark a center then do the same on the leading edge ,then connect to two .this should give you the center line of the wing on both ends .Just take a t pin and poke it into the line front and back,both ends again , then level the wing front to back with shims using a torpedo type level and weight it down ,then check the other end to the first.This method isn't as good as a meter ,but if done correct its real close .At least ya wont have any big surprises at the fist flight. Keep up the good work be looking forward to to see the finished product.
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Old 12-21-2005, 09:14 PM
  #135  
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Default RE: Midwest Extra 300xs Build

That sounds too easy Cyberwolf, I will check and see where I ended up on the first half though I am sure it's pretty close. Had a chance at the swap meet to get a Robarts incidence meter and turned it down??[sm=confused.gif] I bought the Sig Hog Bipe kit instead. If I see this deal again I wont pass it up. In fact, I might inquire if the fellow that had these still does.

I received the cowl and the wheel pants this week and you are right, I really hate to cut the cowl.Attached a couple pics to show quality. This cowl really looks good resting on the fuselage.

I did get a little more time, but not much, to work on the wing. Just sanded the remaining edges on the aileron and the trailing edged of the wing flush. With Christmas just around the corner, I have been out doing more domestic duties than building. Wallet is a little tight too, so after the holidays I will be ordering the servo's and other misc. items that I need.


MERRY CHRISTMAS and a HAPPY NEW YEAR EVERYONE

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Old 12-22-2005, 08:28 PM
  #136  
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Default RE: Midwest Extra 300xs Build

Had another hour or so this evening to work on the wing some more. I started by sticking a pin through the previously tapped aileron control horn block and through the top side sheeting. This was done to mark the location for the 3/16 countersink hole for the 6-32 hardened screw. After drilling the countersink, I screwed in the 6-32 to almost flush and coated the underside of the head with epoxy. Finished threading the screw in good and snug and coated the head with epoxy. Will probably have to use filler on top of this a little when it is dry and before covering. I then cut the 1/2 hinge blocks for the wing to fit between the top and bottom trailing edge spars at the location of the hinges. The plans called for 1/4 but they were too small and would have been difficult to center. I also filled the entire opening so that if I have to replace a hinge later on I know I will have plenty of options for placement.
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Old 12-22-2005, 08:33 PM
  #137  
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Default RE: Midwest Extra 300xs Build

I sanded each one to fit roughly and glued them in place. The 1/2 stock made them fit much better and plenty of surface to glue to. I then did the same with the aileron except I used 3/8 stock.
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Old 12-22-2005, 08:40 PM
  #138  
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Default RE: Midwest Extra 300xs Build

Next, I used Tightbond II to glue in the 1/4" leading edge piece and banded it to dry. On to the wing trailing edge and used the same and banded it as well.
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Old 12-29-2005, 11:58 PM
  #139  
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Default RE: Midwest Extra 300xs Build

Hope everyone is enjoying the holidays, I sure am. Just so happens I have some extra vacation I have to take. Will be off next several days so I might get some much needed repairs done as well as more on the Midwest.

Here is some update pics on the few things I have done so far. First pic is the wing trailing edge sanded flush with the sheeting after the glue dried. Next pic is the aileron and the same.

The third pic is the cowl after roughing in all the openings on the front and before cutting out the bottom for the engine. They look a little rough so keep in mind these openings still need finish sanding for shape. The fourth is the hardwood 7/8" dowel rod that I am thinking I will use for standoffs, I am not totally sold on the idea yet but so far so good.
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Old 12-30-2005, 09:22 AM
  #140  
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Default RE: Midwest Extra 300xs Build

I was going to post the rest of these pics last night, but I dam near fell a sleep at the keyboard.

Ok, first is a pic of the template I used to find the engine mount holes in the firewall. I downloaded it from here, Bubbagates posted this in another forum, thanks again, it really saved my day.

Let me explain, The Brison that I bought used had some hash marks on mount plate that I assumed were center thrust lines. I noticed (before and after, not during the mount process[sm=bananahead.gif]) that the side marks were not exactly center, about 1/4" below center not in line with the prop shaft. Anyway I printed the template and checked it's accuracy on the mount plate, perfect! Didn't check the hash marks at this time (wow, slow down). Centered the template on the firewall offset marks and taped in place. T-pin through the centers of the template targets to mark the firewall for drilling. I removed the template and drilled the holes for 10-32 mounting bolts. Installed the blind nuts and mounted the 7/8" dowel standoffs, now I need to mount the motor and finish marking and cutting the cowl on the bottom. This is where I noticed the hash marks on the engine again!! They were below the horizontal line on the firewall by about 3/16". OH!! SH@&*!!. What did I do?? Ok, calm down, worst case scenario pull the blind nuts (which I have not glued in yet) and fill and re-drill the firewall. Well after looking at the engine again and then going to Brison's website to check the center lines for mounting, I was relieved. The template was perfect, apparently the previous owner had raised the engine installation for whatever reason and in the process etched the hash marks 3/16" low on the horizontal plane. Didn't mean to second guess your template Bubba, but I had no choice at the time,LOL.
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Old 12-30-2005, 09:34 AM
  #141  
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Default RE: Midwest Extra 300xs Build

After several passes of fitting, marking, and cutting on the cowl bottom opening, I finally got the cowl to fit roughly. I will need to do some cleanup on the edges after all is said and done on the fitting but I think I have the openings pretty close now. A few pics of the allignment with room to spare. Most of these the cowl is taped in place.
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Old 12-30-2005, 10:06 AM
  #142  
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Default RE: Midwest Extra 300xs Build

Question?? What is a good way to attach the choke servo linkage. The choke arm is almost parallel to the firewall. Probably 15-20 deg angle.
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Old 12-30-2005, 02:54 PM
  #143  
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Default RE: Midwest Extra 300xs Build

Good thread, Digger. Your documentation is excellent.

Am I correct in assuming that this airplane has a one-piece wing when completed?
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Old 12-30-2005, 02:59 PM
  #144  
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Default RE: Midwest Extra 300xs Build

Steve, that is correct, it is held on with four nylon bolts.

Digger, very nice job on the build thread! I truly enjoyed building my Midwest Extra and I think you will love the way it flies. It's an excellent design and great first giant scale aerobat. I also have the Brison 3.2 in my plane and it is an awesome combo.
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Old 12-30-2005, 04:58 PM
  #145  
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Default RE: Midwest Extra 300xs Build


ORIGINAL: Flyfalcons

Steve, that is correct, it is held on with four nylon bolts.
Bummer. I need a two-piece due to transportation issues. Most of the other "kits" in this size range are more ARCs than true kits.

Got any suggestions? I was thinking about calling Ray's (Hostetler) dad and seeing if any of his vendors are cutting the 27% Extra; none of them show it on their sites. But, come to think of it, I believe that one has a one-piece wing too...[&o]
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Old 12-30-2005, 06:35 PM
  #146  
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Default RE: Midwest Extra 300xs Build

I think Columbo Anderson sells a 27% kit with a two-piece wing. They have an ARC version but I believe they also have a true kit.
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Old 12-30-2005, 06:49 PM
  #147  
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Default RE: Midwest Extra 300xs Build

Thanks Steve, Yea one piece, that is one drawback I can find in this kit. I too would have liked the two piece wing but the flight characteristics of this plane (opinion just from reading posts) is why I purchased it. If you are looking for an extra have you looked at Great planes. [link=http://www.greatplanes.com/airplanes/gpma0250.html]100" Extra 300L[/link] This one is a little bigger but looks nice.

Thanks Flyfalcons, I too am enjoying the build and Looking forward to flying this plane. Did you happen to use a choke servo on your Brison?? If so do you have any pics of the setup? I would much appreciate them.
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Old 12-30-2005, 07:30 PM
  #148  
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Default RE: Midwest Extra 300xs Build

Digger, I don't have a choke servo on my Brison. I attached a ball link and short rod to the choke and drilled a small hole in the side of the cowl for the rod to exit. Pull for choke, push to open. Works great and doesn't weigh anything. I put some fuel tubing around the rod as sort of a grommet.
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Old 12-30-2005, 08:39 PM
  #149  
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Default RE: Midwest Extra 300xs Build


ORIGINAL: Flyfalcons

I think Columbo Anderson sells a 27% kit with a two-piece wing. They have an ARC version but I believe they also have a true kit.
I saw that one. Looks more like a jig-saw puzzle than a kit. But, the new construction style allowed by CAD laser cutters is like that, eh?

Thanks.
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Old 12-31-2005, 04:51 PM
  #150  
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Default RE: Midwest Extra 300xs Build

Columbo Anderson does offer a 27% Extra. It is a 2 piece plug in wing. The wings, Turtle-deck, Stabs/elevators, rudder/fin and front hatch are foam that is pre sheeted. The USA distributor is Aeroworks. http://www.aero-works.net/ The tail surfaces are airfoiled. The fuselage goes together very quickly and the weight is lower than the Midwest. Both fly well. It may look like a jig saw puzzle however don't be fooled as it is one of the best designs out there. I have 1 of these under constuction.
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