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May 19, 2015, 06:22 PM
Registered User
cbalgra's Avatar
Build Log

"Beeker" - A high wing pusher (with video)


Back on May 18, dr.E started a thread, in this forum, about an attractive little biplane he had built called the "Zimmy". Simple enough , right? Well, after waiting for some time to see how it was going to fly, I decided to draw up a version similar to his design.

Not wanting to go with a biplane, I decided to scale it up a little bit also. I really don't know the dimensions of the Zimmy, so I just started from scratch with some equipment I had on hand.

Where does one start when designing an airplane? I guess with the things that attract me to any particular design. Its' lines. Soon, after beginning to put down the first few lines onto paper, it became apparent that the side view of the cabin resembled the window outline of a VW Beetle. Besides anything aviation, VW's are another hobby of mine, and at that point, I tried to incorporate some of the lines of a Beetle into this aircraft, in a whimsical way. The side windows are shaped similar to the doors and quarter windows of a VW and the tail surface outlines are those of a '67 decklid.

Also, remembering an aircraft company in Australia ; Seabird Aviation, builds a similarly shaped plane named the Seeker.(http://www.seabirdaviation.com.au/ ) So, I have combined the names of both to introduce..... "The Beeker"

Not long, after a bit of sketching, something emerged that looked like it might fly. Construction of the prototype was DTF. ( yikes) And I think I even found the perfect test pilot. " Mr. Ewan Me. " ( I see a resemblance )



Specifications:
Span: 43.5"
Length: 34"
Area: 430.5sq in
Weight: approx. 23 oz.
Loading: 8.37 oz/sq ft
Flight controls: RET
Motor: E-Max CF 2822
Prop: GWS 9 X 4.7
Batt; 2200 mah 11.1v
ESC: 20amp

Latest video from 10-16-2016:
The Beeker POV in St George, Utah (5 min 55 sec)


The Beeker in the Wind 10-5-15 (4 min 38 sec)


Beeker #2 (8 min 29 sec)


Beeker Maiden 5-23-15 (7 min 17 sec)


most recent flight:

The Beeker 7-14-15 (7 min 33 sec)
Last edited by cbalgra; Oct 20, 2016 at 03:54 PM.
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May 19, 2015, 06:50 PM
serial scratchbuilder
Granted's Avatar
Cute. Had many (21) Vdubs myself. Gonna offer plans?
May 19, 2015, 07:33 PM
Registered User
cbalgra's Avatar
Quote:
Originally Posted by Granted View Post
Cute. Had many (21) Vdubs myself. Gonna offer plans?
Not sure about plans at this point. Need to prove it flight worthy first.
May 19, 2015, 08:40 PM
Retired CAD guy
birdofplay's Avatar
If you have no CAD wherewithal I can help !

I've helped several guys to the point of them sending me folded up hand drawings
with some measurements.

We all get plans in PDF or CAD format
and IF there is enough interest, or ANY interest, I will offer cuttings from my CNC.

Bob
Hoosier Cutout Service ( look it up )
- I've been busy at this for 9 yrs
May 19, 2015, 08:43 PM
IWC
IWC
Registered User
I Iike it, Plans please
Subbed
May 19, 2015, 09:03 PM
Slow Flyer
Crunch_327's Avatar
I have plans from way back for a plane just like this. the specs are different but all that can be custimized in CAD.

Maybe I,ll start CNC cutting kits for it along with 3D printed parts (landing gear, tail skid, nose protector).?
May 19, 2015, 11:50 PM
Registered User
cbalgra's Avatar
Quote:
Originally Posted by birdofplay View Post
If you have no CAD wherewithal I can help !

I've helped several guys to the point of them sending me folded up hand drawings
with some measurements.

We all get plans in PDF or CAD format
and IF there is enough interest, or ANY interest, I will offer cuttings from my CNC.

Bob
Hoosier Cutout Service ( look it up )
- I've been busy at this for 9 yrs
Thank you for your offer Bob.

I have seen much of your work here on RCG, and believe I may have even purchased some kits from you.

I'll have a better idea after the maiden. Aircraft is completed. Holding back on maiden due to needing a bit more information on thrust lines for a high -mounted, pusher configuration.
May 19, 2015, 11:56 PM
skumgummi dave
cbalgra:

Good looking design. Old 40 HP VW Bug was my first car. Lever on the floor to kick on when you ran outa gas. Came standard with no gas gauge.

Dave-
May 20, 2015, 06:16 AM
Retired CAD guy
birdofplay's Avatar
Check out designs like the Mermaid and or Slowboat for High mounted thrust.
There are lots of others to be sure.

5 might be a good place to start.

Still , your design has the thrust inline with the wing so it shouldn't be much of an issue.
Don't let a draggy fuse bother you. The Judi Sea Jet is so draggy I land it across the runway
yet it's amazingly stable.
Are you glazing the front window or just letting the breeze flow thru ?

Let me know what ever you decide.

Bob
Last edited by birdofplay; May 20, 2015 at 06:26 AM.
May 20, 2015, 07:11 AM
Retired CAD guy
birdofplay's Avatar
I took your photo and simply placed it in CAD background
and traced it with lines and curves.

Then, due to parallax issues with photos, I squared up things a smidge and
wah lah ! your side view was very close to what I would have recommended.

A couple of added dimensions and a screen grab later gets the pic below.
May 20, 2015, 09:03 AM
Don't cut the Yellow Wire
dr.E's Avatar
Looks great... I usually make an adjustable motor mount I can play with the thrust until its just right..... I'm working on the plans setting them up on my phlatprinter as well as designing 3d printed accessories (motor mounts, landing gear)... Yours is approx. 2x the size of my designs....

Do you want to do a joint design project on the next evolution of this ship....
May 20, 2015, 10:11 AM
Retired CAD guy
birdofplay's Avatar
OK I'm sorry, I'll stop and butt out if you prefer, but , sigh .......

I got "INTO IT" in CAD and just couldn't help myself, as is often the case.

This fuse is quite wide , to be more Vdub like.
That made it kind of a large plane and made the 42" wing look a bit small.

Hey, with all that "glass", this might turn into a great FVP platform !?!?

PS: I had a Bug and 67 Transporter so I understand the Bug thang.
May 20, 2015, 10:18 AM
Out the Window
High Flyin''s Avatar
I am looking forward to some flight video. It sure is a great looking aircraft!
May 20, 2015, 10:40 AM
Registered User
cbalgra's Avatar
Quote:
Originally Posted by foamdave View Post
cbalgra:

Good looking design. Old 40 HP VW Bug was my first car. Lever on the floor to kick on when you ran outa gas. Came standard with no gas gauge.

Dave-
'63 ragtop was my first. Loved that car on warm summer nights with the roof slid back.

'67 is my current car. Always was looking for a 67, and finally found a rust free, one owner car several years ago to restore.
May 20, 2015, 11:05 AM
Registered User
cbalgra's Avatar
Quote:
Originally Posted by birdofplay View Post
OK I'm sorry, I'll stop and butt out if you prefer, but , sigh .......

I got "INTO IT" in CAD and just couldn't help myself, as is often the case.

This fuse is quite wide , to be more Vdub like.
That made it kind of a large plane and made the 42" wing look a bit small.

Hey, with all that "glass", this might turn into a great FVP platform !?!?

PS: I had a Bug and 67 Transporter so I understand the Bug thang.
Bob, your CAD work is greatly appreciated. The first rendering is spot on! The color 3-views of the wide body are nice also. BTW. the wing chord is 10" and the prototype has a full "built-up" wing, but not sure it will be worth the effort. Also, fuse width is 3 1/2" on this one.

Thanks for your input on the thrust angle. I will be able to adjust if neccassary.

Put it on the scale and with 2200mah battery and all gear: 22oz.
Last edited by cbalgra; May 20, 2015 at 11:11 AM.


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