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FTFC20 Little_Bit_28 Designed by Hai-Lee

Hai-Lee

Old and Bold RC PILOT
#1
I really love simple builds and the possibilities of Retro Flying Wing designs. In the past I have done a few conversions with a degree of success. Actually my favorite plane to chuck in the air is such a retro design.

Anyway I like the simplicity of the "Bloody Baron" but each one I built was too heavy and they did not like a large power plant! Needless to say I still build them occasionally but until I obtain a much lighter FB the original design is just beyond my reach and abilities.

Enough preamble! For my entry I have chosen the "LITTLE BIT 28in" which resembles the "Bloody Baron" BUT it is actually a retro design flying wing! My intention is to design it so that it can take the powerpod from a TT and give a totally new and thrilling flight experience for those who have graduated from being a Newbie to a novice pilot.

Here is the Balsa Original;
Gas Powered.jpg

As I will not be attending Flight Fest if any attendees want to build one to take with them please feel free and even ask questions to help them get their version flying!

Original Plans and Article:
https://outerzone.co.uk/plan_details.asp?ID=5763

FB Plans:


Have fun!
 

Attachments

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Hai-Lee

Old and Bold RC PILOT
#3
Design notes/Ideas: Wow I did not realize how many options I have on such a simple bird!
I can make the wings in a plethora of ways and the wing tips can similarly be made a number of ways.
The fuselage whilst quite simple, (basically a rectangular box with a taper at one end), there is the planning of the positioning of the electrics that has so many possibilities!
Then there is the scale! The plans have no included scale/legend and the 2 copies I have of the plans vary slightly in scale so I must pick my own scale or at least guess what the original sizes were.
Finally there is the plans to be drawn and published! I normally use A1 or A0 sized plans but this may cause problems with some forum members. I may attempt my first SHEET sized plan, 20" x 30".
The detailed design work will commence shortly, once I have my ideas whittled down in number and it will start out as a paper and pencil design for the prototype with the electronic plans being drawn up when I am satisfied with the design and its performance. This MIGHT require a range of prototypes and layouts!

Maiden video and Photos!
 
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rockyboy

Skill Collector
Mentor
#6
She is a balsa design, but you're right that it could be easily adapted for coroplast! The other picture on the Outerzone site is a fun color scheme too!

 

Hai-Lee

Old and Bold RC PILOT
#7
Welcome @Hai-Lee. What was the original fuse built from? looks like chloroplast
@rockyboy has already given the answer but further to the plane there was actually 2 designs in the same series and this was the largest! The other called "Tiny Bit" is even smaller but due to the weight of the local FB I was unsure that I could do the design justice.

Both are Balsa designs, (including built up wing construction!

have fun!
 

Hai-Lee

Old and Bold RC PILOT
#8
Design progressing. It is actually bigger than I thought! My first fuselage suffered from a newbie error, I folded it the wrong way and ended up with LEFT thrust angle:rolleyes:. So I will need to dig through my props and find a CW prop to suit!:whistle:.

As I need to build one with right thrust I decided to do a symmetrical KFM wing version as well, (it will use the left thrust fuselage). I did a rough calc and the KFM wing will have slightly less lift and be a little heavier, BUT it will be much easier to build and a little more robust!

I will fly both versions before I post any pics or plans.

More later!
 

Hai-Lee

Old and Bold RC PILOT
#9
Just a little progress on the prototype/s

2 fuselages awaiting the paint and fitting out!

DSCF0033.JPG

The KFM wing showing spar fitment. When the glue is properly set the laminations will be glued into place and of course the paint will be applied and then the wing will be fitted out also.

DSCF0034.JPG

Have fun!
 

Hai-Lee

Old and Bold RC PILOT
#12
talk about easy an durable!
Actually if you look at the latest releases the idea of robust construction seems to have been lost! I like the idea of good performance not only in the air but also in the ability to fly more than once between rebuilds!

There will be a more accurate design to suit the original plans but a robust model can still be easily made without too much loss of performance or flight experience!

MUCH more to come!

Have fun!
 

Vimana89

Well-known member
#14
Very nice, I love the KFM option and simplicity of the design. Definitely interested to see how this turns out, should fly great!
 

Hai-Lee

Old and Bold RC PILOT
#15
It has been a while since I have been able to return to this project but here is a little progress on the KFM version.

Here is the wing fitted out with its servos and Receiver, (mounted to the wing). Mounting the Rx on the wing means I only need to plug in the ESC plug to reunite the wing and fuselage.
DSCF0035.JPG

The Motor, ESC, and battery mount in the fuselage, (pic later).

Have fun!
 

Hai-Lee

Old and Bold RC PILOT
#16
I just did a balance test and it balances with a 2205 for the powerplant, a 9x5 prop fitted, a 12A esc and an 850 3S in the nose,

As the fuselage is a hollow box it opens up a great number of motor and battery combinations!

Pics later!

have fun!
 

Hai-Lee

Old and Bold RC PILOT
#18
I already have a spare fuselage, (the left thrust mistake build:rolleyes:), so I will build this one using a CW motor setup.

Cut out the wing panel. Removed the internal paper and cleared the spar locator slots. Curved the wing panels, (as per Master series), and cut the aileron hinge line as well as freeing up the tip formers! The TE of the under panel has a broad bevel so that the TE is paper only and when fitted against the upper panel there is no gap and a smooth transition to the ailerons/elevons!
DSCF0034.JPG

Cut out the keyed spar and the front and rear sub-spars. The sub-spars have all of their paper removed!
DSCF0035.JPG

Spar and sub-spars keyed in and glued!
DSCF0036.JPG

Wing closed and glued
DSCF0037.JPG

Wing tip formers glued into position and the wing test fitted to the fuselage after the wing lower profile is cut into each side of the fuselage!
DSCF0038.JPG

Not sure how I will proceed with the wing tips but that is for later!

Starting to look like it should!

Have fun!
 

Hai-Lee

Old and Bold RC PILOT
#19
Well the paint is currently frying on the wing but I did try something totally different, (for me anyway). To cover the wing tips and give the nice compound curves I grabbed a bit of clear self adhesive book covering plastic and noticed that it stretched a little under tension. So I cut a couple of pieces and stretched them over the wing tips! It may not be perfect but it is quite good and looks the part!

Pics to follow when the paint has dried!

Have fun!
 

TooJung2Die

Well-known member
#20
I grabbed a bit of clear self adhesive book covering plastic and noticed that it stretched a little under tension. So I cut a couple of pieces and stretched them over the wing tips!
That's an interesting solution. Can't wait to see the result. Another forum member, BobK, perfected a similar idea using dollar store cellophane gift wrap and aerosol adhesive. Using a heat gun you can stretch it over compound curves. Plus it comes in colors.

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