Toronto Electric Model Aviation Club Forum

Toronto Electric Model Aviation Club (TEMAC) => Building / Construction => Topic started by: Frank v B on December 22, 2022, 10:27:55 PM

Title: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on December 22, 2022, 10:27:55 PM
Started building it after dinner tonight.  Letting it dry overnight.

The only deviation from the plans is adding a second rudder post and elevator leading edge so I can convert it to RC.

Will post photos once the computer stops fighting me.

Frank

Note: in the photos, I leave the cross members long because it is easier to cut them accurately once the glue dries.
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on December 25, 2022, 01:00:49 PM
All sub-assemblies done.

F.
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on December 30, 2022, 05:34:15 PM
Covering just about finished. Nothing has been shrunk yet.  It tends to twist these light structures.
The plane is single colour because it was the lightest covering I had. 
Any heavier covering and the whole structure will implode when the heat is applied.  Balsa in a bag! ;D

Will shrink the plane's covering once fully assembled.
The clamp on the fuse is to let a balsa sheet cockpit floor dry.
It will be taking the weight of the battery, ESC and receiver.

Two sub-micro servos glued onto the fuse sides.
Motor is an E-Flite 180 ( a 5 amp max motor) and an E-Flite 10 amp ESC.  It will be on 2 cells.

Frank
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: octagon on December 30, 2022, 10:01:20 PM
Good Job Frank. 26 hours till deadline, looks like you're going to make it.
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on December 31, 2022, 09:00:52 AM
Looks like a plane!

Last bits to do:  pushrods, add covering between the wings (fuse top), test motor, add wheels, shrink covering, true everything up.
Total weight before battery and RX is 2 oz.

Frank

ps: Rob, I think I will make it. ;)
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on December 31, 2022, 03:38:43 PM
Trick: Cross the pushrods for the rudder and elevator. (the servo on the left side of the plane uses the pushrod that exits the right side of the plane at the back).

I used thin aluminum tubes as pushrod guides and use very thin piano wire as pushrods.

In this photo you can see how the tubes cross over near the rear.  This is so there is a single smooth bend in the pushrod from the servo out to the rudder/elevator.  The bigger the plane, the more important this becomes because the wire is thicker and less flexible.

Frank
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: msatin on December 31, 2022, 05:33:29 PM
Looks great Frank!
Good Luck
Happy Landings  ;D
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: octagon on December 31, 2022, 06:19:31 PM
So, will you be flying that in your kitchen tomorrow Frank?  I bet indoor somewhere tomorrow.
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on December 31, 2022, 06:39:00 PM
Finished!

Put on the wheels, powered up the motor, connected the elevator and rudder, shrunk the covering, added twist in the wings (see head-on view, middle photo).
To answer Rob's question....probably a 5 continent flight...dining room to family room to kitchen to hallway to living room. ;)
The landing will probably the subject of a future Mayday episode.


Frank
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on January 01, 2023, 01:17:11 PM
....so Rob Dickinson phoned me to wish me a happy new year and see how the flying was going.

Here is my photo report of my flying (s)kills:
25- the dining room
26- the family room
27- the kitchen
28- the front hall
29- the living room.

If the next photo/video works it will be a hoot.  Thanks for the inspiration Rob.

Stay tuned.

Frank

Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: msatin on January 01, 2023, 02:00:32 PM
The landings may have been a bit awkward, but the plane is still 1 piece!
Well done :)
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on January 02, 2023, 03:13:11 PM
It flew...indoors.

Tied 5' of fishing line to the landing gear and fed it out to the wingtip at the CG.  Put masking tape at the wingtip.  Tied it to the center of the ceiling fan 10' off the ground (12' ceiling).

When I revved up the motor, it happened to go to inverted so I flew 4 circuits inverted.  Then stopped the motor and made it go the right way.  Did 4 circuits with the plane in the correct orientation.  It flew perfectly at half throttle.

Mission accomplished!

Frank

ps: took a 1 minute video but it is too big to transfer.
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: msatin on January 02, 2023, 03:29:51 PM
Semi-Automated Control Line flying.
Pat Mackenzie would appreciate it!
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Frank v B on January 02, 2023, 03:38:35 PM
Thanks Mark.  I was trying to channel the spirit of Pat MacKenzie.

Technically it is an RTP* that they did to really small IC model planes in the '50's and '60's.
This one was under full control of the elevator.  It could go up or down.  Didn't dare try a loop.

Frank

*Round The Pole

https://www.google.ca/search?q=round+the+pole+flying&source=hp&ei=2kCzY4GSEpTX9AOawouYDQ&iflsig=AJiK0e8AAAAAY7NO6iiz-DfosayXEzQp3k1hGO6NHfzj&oq=&gs_lcp=Cgdnd3Mtd2l6EAEYADIUCAAQ6gIQtAIQigMQtwMQ1AMQ5QIyFAgAEOoCELQCEIoDELcDENQDEOUCMg4IABCPARDqAhCMAxDlAjIOCAAQjwEQ6gIQjAMQ5QIyDggAEI8BEOoCEIwDEOUCMg4IABCPARDqAhCMAxDlAjIOCAAQjwEQ6gIQjAMQ5QIyDggAEI8BEOoCEIwDEOUCMg4ILhCPARDqAhCMAxDlAjIOCAAQjwEQ6gIQjAMQ5QJQAFgAYKYPaABwAHgAgAEGiAEGkgEBMZgBALABCg&sclient=gws-wiz#fpstate=ive&vld=cid:3b5b0d4d,vid:JJcOvkz0S2A
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: Andy Hoffer on January 02, 2023, 06:22:45 PM
Bravo @Frank v B !

Any photos of Cynthia with her 12-gauge indoor domestic airspace control device? 

Cheers,

Andy
Title: Re: Speed-building a Guillows 20" span super Cub for New Year's day
Post by: GuyOReilly on January 18, 2023, 01:26:36 PM
The long-awaited video premiere of @Frank v B flying indoors.

https://www.youtube.com/watch?v=_GLmYEO3JV8


PS: No wife sighting in the video.