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ClassMate plan build

Old 05-26-2009, 04:44 AM
  #1  
windy city
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Default ClassMate plan build

Now for something different! Not your usual build thread.
This will be about a set of plans, and the trials and tribulations of scratch building a balsa model from a set of magazine plans that are over 40yrs old.
Subject of this thread is Ken Willard's ClassMate bipe from 1968.

Those not familiar with Ken Willard just do a Google search for "Ken Willard AMA". There is a PDF file with just few of his accomplishments over the years.
To me one of his biggest accomplishments was he would design, build, fly, and publish a new set of airplane plans each month. He did this with several magazines over many years. He was one of the early RC pioneers. A very talented designer!

On to the airplane. The ClassMate was designed as a 3ch .10 nitro plane with a top wind of 39" bottom wing of 32". Oh did I mention were doing this up electric?

So here the deal, we get you some PDF files for the ClassMate. And anyone that would like to build one is welcome. Everyone has their own ideas on how to build an airplane, so any changes you would like to make to the plans would be fine with us. Just post the changes and the results. Everyone wins!

Whats with all this "we" stuff? (no I don't have a mouse in my pocket. lol)
The other half of the "we" would be a good friend of mine by the name of praymond. We met over on a different site when we were building foamys years ago. We found we have the same taste in airplanes. Now we have moved up to balsa planes and than to scratch building. Though we live in different parts of the country last OCT we did get to fly together for the first time. As a plus I got to meet a few of his flying buddies also. Some real talent there! I had a great time!

Praymond and I have scratch build a few of the same balsa planes. We both like the looks of old bipes. So it was time for a bipe! We looked over a lot of plans and came up with this one.

After we picked this model I emailed my local FB's to see if anyone would like to join in on the fun. One local guy jumped on board.
So as it sits now there is two of these being build, an one has been flown.
Yes flown! I dragged my feet posting this thread till one flew. I did not want to take anyone down a bad road. One of the first changes we agreed upon was the size. We chose to build it at 80% with a top wingspan of 30" and a bottom wingspan of 25".

So I'll post 100% size PDFs, and the 80% size we used.(one sheet, and tiled)
Anyone that would like to try their hand at one that would be great!

windy city
Attached Files
File Type: pdf
classmate-100.pdf (218.0 KB, 464 views)
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classmate-100_tiled.pdf (229.5 KB, 281 views)
File Type: pdf
classmate-80.pdf (216.4 KB, 342 views)
File Type: pdf
classmate-80_tiled.pdf (224.9 KB, 217 views)
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Old 05-26-2009, 05:01 AM
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windy city
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To start the ball rolling,
My changes so far would be the 80% size, on the wings I chose to go the built up route without dihedral and bard door ailerons on both wings using the stock air foil, and moving the battery hatch to the bottom.

I'm a slow builder, all I have done at this point is the fuse, bottom wing, and tail feathers.
I'll post more pictures soon!
windy
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Old 05-26-2009, 12:23 PM
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starcad
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Really nice project I will be following. Ken was extreamly talented I think a lot of us that grew up with his designs miss him very much. I always loved his underdog design but never had the time to build it. Keep the dream alive good luck on the build and maiden.
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Old 05-26-2009, 12:37 PM
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Hi Fred, looking forward to this.
I was there when Paul flew his. Flew nice.

Paul
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Old 05-26-2009, 03:41 PM
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windy city
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Starcad,
Thank you! I agree Ken Willard's designs are something. Funny how us older guys all have a favorite Willard design. The Underdog doesn't ring a bell with me. Mine would have to be the Top Dawg.
Sad thing is there is not much info on the internet dealing with the Willard designs. It would be a shame to loose all those designs just because time marches on,,,,
Fred
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Old 05-26-2009, 03:46 PM
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windy city
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Hello Paul,
Glad you stopped by!
Have you been giving praymond building lessons?
I'll be lucky to finish mine before he flys his next plane. lol
Fred
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Old 05-26-2009, 05:09 PM
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Originally Posted by windy city View Post
Hello Paul,
Glad you stopped by!
Have you been giving praymond building lessons?
I'll be lucky to finish mine before he flys his next plane. lol
Fred
He's building faster than me too.

Paul
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Old 05-26-2009, 05:17 PM
  #8  
Clif
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Smile Joining your build

I have never done a scratch build before. I'm probably taking on the wrong airplane for the first one. But I like Biplanes so why not. I'm also making it a 30 inch wing. I will be watching very closely to get Ideas on what I'm doing. Pics on the build progress attached.
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Old 05-27-2009, 01:28 AM
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windy city
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Yes guys, Clif is the local FB that jumped in on this build early on.
Clif,
Welcome to WattFlyer! Not a bad first post! lol

Fred
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Old 05-27-2009, 01:50 PM
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Hi Clif,
Welcome to Wattflyer.
Looks good so far. Now I get to see two more of these planes.
Paul
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Old 05-28-2009, 06:14 AM
  #11  
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I am in the process of assembling the fuselage and carving the head rest and Eng. cowl. It should be done by tomorrow and I will send pic's. This is quite an experiance cutting the parts out your self and making changes to the plans as you build. I find myself looking at the plans for one hour and trying to figure out if what I'm about to do will mess up things down the line. It's a lot harder then I thought. With all this thinking and engineering that I'm doing it will be very satisfying when it flys.
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Old 05-28-2009, 09:30 PM
  #12  
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Originally Posted by pd1 View Post
Hi Clif,
Welcome to Wattflyer.
Looks good so far. Now I get to see two more of these planes.
Paul


Thank you Paul
Clif
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Old 05-28-2009, 10:03 PM
  #13  
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Build Review

I have carved out the head rest and the cowl plus assembled the fuselage. Carved out the hatch and mounted it with magnet buttons. Now for the wings. This looks like a challenge, I guess we will see. attached pic's Note the cowl in the pic is from a Park Zone Cub and I think I will us it instead of the one I carved out, it fits perfect..

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Old 05-30-2009, 02:24 AM
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I'm embarassed to post my progress on this build, cause I finished it. Fred found the plans and we decided to give it a go, After thrashing it around in my mind I decided to bash the design a bit more that fred and cliff. I started with the 80% plan, but changed the top wing to 35" and bottom to 28" . I then changed the foil to a semi-symetrical profile, the one that pd1 used on his rocket. Wings have 2 different cords

Then I added more tail surface area and raised the hor/stab to the top of the fuse. It's not a Classmate now really, looks more like a Hog Bipe.

This is my 3rd build off a set of plans, and with so many changes i had a lot of head scratching as i went along

I got a jump start by having a friend cut out the ribs on his cnc router. He uses it for cutting out stair treads for custom stair cases. Got a few jibes for cheating on the ribs, but hey, I couldn't pass up the offer.

Here's a few pics from the start of the build, I took quite a few and sent them to fred and Cliff.

Paul R
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Old 05-30-2009, 02:42 AM
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Nice pictures. Going flying tomorrow?
Paul
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Old 05-30-2009, 02:44 AM
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Great pictures... good job..
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Old 05-30-2009, 03:32 AM
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Thanks

jfrost took some great pics!

Ya I hope to be there tomorrow, got the grankids for most of the day, hope to unload them by 5. charging up some now.

here's a few more pics

Here's the finished specs:

Weight w/no battery--20.4oz
4, H-55's
headsuprc, power up sport 400 and 20A esc

painted doculam (thanks again jfrost!)

Problem is now I need a few more bigger 3s packs. this is my 2nd plane that draws over 10 amps.

Paul R
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Old 05-30-2009, 03:41 AM
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Clif
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Paul the airplane looks great and it looks like it flys as good as it looks. I hope mine will turn out as nice looking and fly as good. It's going to take me a lot more time then you to finish.
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Old 05-30-2009, 04:20 AM
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windy city
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Paul R,
You should not feel at all embarrassed! (cept for the ribs!)
Your Bipe turned out fantastic, it has the "LOOK"!

And for being the first to finish the build I'll send you the last new
McHenry Park Flyers hat. You have followed a few of our antics over the years so you might as well get the hat! Your our long distance member.

Now I really have to stop slacking and get building again.

Again super job!

slacker Fred:o
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Old 05-30-2009, 04:50 AM
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hey thanks fred, I'd be proud to wear one!!

Well next time we decide to do another group build, I'l get my cnc buddy to cut out all the ribs for us

pawnee anyone?
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Old 05-30-2009, 05:45 AM
  #21  
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Nicely done! Very good looking plane for sure. I might slap some Cub ballon wheels on it. I've seen some smaller ones at the LHS recently that look like they might fit the bill well.
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Old 05-30-2009, 08:59 PM
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windy city
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Originally Posted by praymond View Post
hey thanks fred, I'd be proud to wear one!!

Well next time we decide to do another group build, I'l get my cnc buddy to cut out all the ribs for us

pawnee anyone?
give me a week or so And it will be in the mail.

I was just busting on you about the ribs with sauce!

The Pawnee will have to pass me by,,,, I just can't keep up.:o
Fred
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Old 05-30-2009, 09:43 PM
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Here is as far as I have gotten so far,,,,

next is the top wing

yep slacker
Fred
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Old 05-30-2009, 10:18 PM
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These are looking great....and it's nice to see that Willard's designs are still to be found. He was one of the most prolific designers of his time. Great little birds you have there.....

Don
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Old 06-02-2009, 04:09 PM
  #25  
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It looks like i'm right along with the same progress as you fred. I assembled it with tape to take pics. Note the cub nose and wheel pants, there from a park zone model. The servos are also installed above the lower wing upside down. The alerions are off the wing. I now have to start on the upper wing. With summer here i have a lot of other things that have to get done first. So this is going to take a while to comlete.

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