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Ladybird 1.5

150% enlargment of classic design

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Keith Evans 303/09/2019 13:19:33
393 forum posts
148 photos

Just a few retrospective build notes from my recently completed Ladybird 1.5

I acquired a Ladybird kit just over a year ago and decided to build a 150% version to suit myself and the flying site

I decided to give it flaps and ailerons .Some people may say " Why do this ? "Well it's my plane so why not .p1030629.jpg

Keith Evans 303/09/2019 13:34:18
393 forum posts
148 photos

p1030613.jpgI found a photo shop in Cardiff to enlarge the plans and had 2 run off .One to keep and the other to cut up and build from .

As is normal for me I sketch over the plan to highlight areas I need to modify i.e. engine mounting , tank position ,servo location etc.

Mods to the fuselage meant doing away with the wing box as I'll be building a one piece wing and the tail area needed to change to accommodate a fixed tailplane ,not a pivoted type as shown on the original .

The cabin area was also beefed up to allow for a banded on wing.p1030610.jpg.

Keith Evans 303/09/2019 13:48:15
393 forum posts
148 photos

p1030612.jpgp1030611.jpgp1030609.jpgp1030607.jpgp1030606.jpgp1030605.jpgp1030604.jpgp1030603.jpgp1030602.jpgp1030601.jpgp1030600.jpgp1030599.jpgp1030598.jpgFollowing the original build instructions led to a bit of difficulty in the fitting of one of the fus. formers in that it has to be "sprung " into the partially constructed fus .Brute force and a prayer came into play .The increased thickness of the longerons were not that flexible ! ! ! .

The wig ribs were not all that accurate so a new set were made .

More food for thought came into play in constructing the lovely curve from the fus . to the fin .I decided to lay down one1/8" x 1/8" stringer first and then topped that with another .to aid film covering later I also infilled the stringers with balsa an cladded the fin in 1/32" balsa .p1030597.jpg

J D 803/09/2019 13:50:42
1438 forum posts
84 photos

A KK Ladybird was my first FF power model and I did get some good flights out of it but that wing box idea was not good. The box as well as the wings was removed several times on arrivals and lead to its demise. If I were to make another it would be a one piece wing like yours.

Love the colour scheme, very apt.

Capt Kremen03/09/2019 14:00:32
349 forum posts
134 photos

As a youngster growing up in Cardiff, I built the original KK 'Ladybird' F/F model. Powered by a Cox 049, as a complete novice, I launched the model with a full tank of Cox finest glow fuel at Ely Racecourse [Trelai Park(?)].

Up, up and away in spiralling circles until the 42" wingspan was a mere dot in the sky! A mixture of joy, (at the flight), and sadness I would never see my tissue 'n doped pride and joy again.

Off home, I wondered if pocket money shilling might stretch to a new model replacement from Watkins, Ironmongers at The Insole parade of shops or even if very lucky, grandad would take me to Bud Morgan (Model Shop) in the cities Castle Arcade.

Anyway, a few days later, about 6 of an evening, a knock at the front door. A Forestry Commission workman stood in the porch clutching my lost treasure. It had apparently flown way over the nearby hill toward Penarth and landed in the trees that (fortunately for me) were being worked on.

And so that weeks (and some!) pocket money was given to the workman as a reward.

My name & address had been scrawled in faint 'Boys Biro Handwriting' on a panel near the tail which fortunately hadn't punctured in the branches.

Great to see 'Ladybirds' fly on in Cardiff!

Keith Evans 303/09/2019 14:05:14
393 forum posts
148 photos

p1030632.jpgp1030631.jpgp1030630.jpgp1030629.jpgp1030628.jpgp1030626.jpgp1030625.jpgp1030624.jpgp1030623.jpgp1030622.jpgp1030621.jpgp1030620.jpgp1030619.jpgp1030617.jpgp1030616.jpgThe cowl I kept for last as I wanted to calculate the length to accommodate the engine positioning to arrive at a satisfactory C of G with out having to add extra weight .It is a simple all balsa cowl backed with ply It was made from 1/2" sheet and1/2" triangular stock . the lower half is screwed to the bulk head and the upper held on with magnets .

I had a choice of using stylised lettering or replicate a ladybird .The black circles were easier ! ! !

If I were to build another I'd possibly redesign the U/C to allow for a lower tank position or incorporate an upright installation .

It's currently fitted with a Thunder Tiger 42 Pro but it may be retro fitted with a diesel

The wing loading is 19oz /sq . ft .

As for a maiden flight this is likeable to happen in the new year as I need the "Newnp1030615.jpgess " to wear off and I'm away for most of the winter .

Mike T03/09/2019 18:28:20
489 forum posts
37 photos

Superb build Keith! My unfinished original size one is still in the shed somewhere, awaiting conversion to lightweight 2-channel RC. Power will be a DC Merlin. Where will you be flying yours?

@Capt. Kremen - we still fly at Trelai Park (the old Ely racecourse). We bung the Council a couple of bob every year to preserve our right to do so.

Keith Evans 305/09/2019 10:28:28
393 forum posts
148 photos

Hi Mike et al.

I'm a member of the Valley Flyers and we have a site approx. 1/4 mile from "Llancaich Vawr near Gelligaer .

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