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Yellowhammer

Well-Known Member
HBA Supporter
Joined
Feb 21, 2020
Messages
556
Location
Born In Alabama, reside: Louisiana (unfortunately)
OK, that first post was a LONG time ago, and I had to look to see which 'low wing' you were referring to.
I'll have to admit (again) that I have a bad habit of not getting projects finished, and unfortunately this is one of them.😟
I will however try to get around to documenting the build up to it's current status.
I called it, the LR-2.
View attachment 108642
Don't ask me how I get that far in a project and have it grind to a halt, it's too long and frustrating.😒


Thanks for sharing that information. I think the LR 1 is a super clean and sexy looking plane. I love the lines and entire concept. It has the look of "I dare you to come pull some G with me"!

I would very much like to see some build pictures and hear more about the design process and any other details you might want to share.

I too am guilty of unfinished projects but those are all non aviation related. LOL

You are obviously very talented and gifted. Your craftsmanship is superior in every way. Your creativeness is second to none.

Thanks for taking the time to share with the rest of us.

Sincerely and Respectfully,

Yellowhammer
 

pylon500

Well-Known Member
Joined
Dec 26, 2003
Messages
395
Location
Taree Airport Australia
My initial ideas for the undercarriage was for a single leg per side, but once assembled, and looking at the undercarriage on the DH Beavers I regularly worked on, I realised that braking loads would probably bend the legs backwards, so a compressive drag link was needed. While I could have set a jig to align the rear pivot with the front pivot and just weld in a bush tube, it was quicker to weld a nut near where the pivot would be, and screw in a rod end.
Two pieces of T section were then riveted to the skin across an internal bulkhead, and bolt in the rod end.
068_U_C_drag_bracing.png
The wheels and brakes used were Azusa 8" complete kits from Spruce;

Azusa_wheels.png
(they were cheaper when I bought them, and they are actually more expensive than shown now!)

I never took any photos of the lower axle setup, but a unit was made that fit into the end of the leg and had the axle slide into it. A tang was welded at the bottom of the unit to attach the brakes.
One bolt held the unit in place on the leg, and another bolt held the axle in place. A machined aluminium block was held by both of these bolts, that formed the adjustable end for the brake cable.
Stollite26.JPG

Looking back on this project now, I see that of all the 'progress' photos I took, many don't really explain very well of how I got to where I was, or detail many of the important little details that people tend to look for...
'Sorry about that Chief!'
No details of the control stick, no details of the rudder system, no detail of the trim system, no much on the tailwheel... 🤷‍♂️
Only detail I have of the tailwheel is this;
067_Tail_Wheel.png
Which I shall describe as, 'a modified tailwheel from the earlier mentioned LightWing, fitted with a remote unlocking cable, the unit pivoting on a fixed vertical bolt and bush.'
The rudder cables ran from the pedals into the cabin floor through fairleads, and back to an 'idle swing-arm' under the rear floor. This 'swing-arm' was a fabricated sheet aluminium beam with a central pivot (an aileron belcrank bearing), which would carry all braking loads from the rudder pedals, and not impose these loads onto the lower rudder hinge bolt. From this swing-arm under the rear floor, the two rudder cables ran under a pair of fibre pulleys, where they then headed towards the top of the fuselage at about a forty five degree angle. These cables terminated at a D shackle each, whereupon four cables continued upwards towards four fibre pulleys, then two of the cables continuing to the rudder, and the other two cable going back down to exit at the lower rear of the fuselage and connect, via springs, to the tail wheel.
(Pictures always make more sense)
Stollite_profile.png
The shot, while a little non-descript, shows the rear cabin/baggage area floor, and the two access holes to where the rudder cable are bolted to the 'swing-arm'.
061_Cabin_floor.png
The hole at left of shot is one of the holes the aileron telemorse cables comes up from beneath the floor and crosses over at the roof-line into each wing.
These allow the wings to be folded without disconnecting anything.

I might mention here the prototype flap handle that was fitted to the floor next to the seat.
It worked, was a little awkward, and was only used for the first half-dozen or so flights before some interesting modifications began.
065_Flap_lever.png
Enough for now, next we'll try to get the wings on...👋
 

pylon500

Well-Known Member
Joined
Dec 26, 2003
Messages
395
Location
Taree Airport Australia
Wings on?
Might have a quick chat about the door first.
Due to a slight oversight when assembling the cabin section upside down on a bench, I got mixed up with my left and right, and ended up with the door on the left hand side. Not a major problem you say except I was going for the Cub idea of door on the right with the throttle on the left 🤔 🤷‍♂️
Well, throttle cable are usually flexible anyway, so the throttle quadrant went on the door!
064_Throttle_Lever.png
The quadrant consisted of an arm riveted to a machined drum, with a bit of polycarbonate wrapped around the drum and attached to a screw knob to adjust the throttle friction... (sort of worked)
While all this was happening, I got our local upholsterer to come up with a nice seat cushion arrangement.
(I was trying to keep the cost down so said use whatever material you had left over)
066_Seat_gets_upholstered.png
It's actually a very comfortable seat and despite the harness being attached to the seat instead of the airframe, it all proved itself one day when the aircraft ended up on it's back and me hanging in the still firmly attached seat. (That story comes later...)

Eventually we ended up with a basically complete fuse sitting on three wheels, with a motor and a seat, so we bolted on the tail group and rolled it outside for some VP (visual progress) photos.
071_Can_we_taxi.png

OK, NOW we will put on the wings.
Using some assorted stands, the wings were aligned and fitted, and the struts drilled and bolted to length.
069_Rigging_Wings.png
At this stage the wings had been stored and not fully finished at this time.
So, now with both wings fitted;
073_Wings_rigged.png
And then to see if I got the folding dynamics right...
072_First_time_fold.png
Note that during the working day, the plane was usually pulled apart and stored in the corner of the hangar (and the boss would regularly remind me I was lucky to get that).
I didn't take any photos of the wings being finished, so we skip forward to attaching and rigging the flaps, as well as adding the transparencies.
I also didn't shoot the install of the rear brace tubes from the turtle deck to the rear spar carry through, which can just be made out in this next image.
074_Rear_Screen.png
OK, somewhere in the near(?) future, I'll continue with final assembly and paintwork. 👋
 
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