1:3 Bohatyrew 'Motyl' of 1925

[ARUP]

Csesc modelarze! Here is the wing tube socket carry through and bracing without all of the clamps. The small piece of spruce to the right of the socket is to receive the anti-roation pin's socket. I left it long enough that any decalage misalignment issue can be rectified by moving the socket. The anti-rotation pins are 1/8" music wire and the tubes are brass. The wing roots will have aileron servos mounted to their exterior side so a recess will be made in the fuselage to clear them. Scrap balsa elevates the servo from the root rib surface and two wraps on masking tape gives a little 'wiggle room' side to side for mounting. The epoxy is curing for the servo rails as I type. I gusset will get added to each side. I'm giving these new 'Pro Modeler' servos a try.







Wroce!

[ARUP]

Czesc wszystkim! The root rib was used to mark the position of the wing socket carry through. 1/4" ply supports were cut and fitted for spruce diagonals. Balsa support blocks were put across the top of the tube inside the fuselage. These were capped with pine stock. Now you know why I made this one bulkhead from lite ply wood. It is for torsional rigidity but thin so that 'stuff' can be added to it. The CF in the laminations help spread loads. That socket ain't coming out! Epoxy is curing as I type!









Wracac!

[ARUP]

My brother and I went to hear the Pixies in concert last night and it was great! Back to sailplane stuff. Here's a start on the wing construction. The main 'Hershey Bar' portion of the wing has all of the ribs ready to receive spars.



PA pa!

[ARUP]

Thanks, Gene!

[Gene C]

Outstanding!

[ARUP]

Wiecej! Before the ribs can get threaded onto the spars the front spar cutouts need to be made in the ribs. The rear spar cut outs have already been done for they were used to locate the position of the LE and front spar. Also, the TE need to be finished. The aluminum tube capture the wire TE that will be added. The tubes need reinforcement so 1/64" ply added each side of the 'regular' ribs. The 'special' ribs next to the inboard portion of the ailerons are longer so have angled wire pass-throughs on their tube ends. They also have hard balsa segments on their inboard side to help prevent the covering from pulling them inward. A couple of pictures show the wire TE through the tubes. The covering will pull a nice scalloped curve effect in them!







Pozniejsze dni!

[ARUP]

Wrocitem! The rear spar is angled where the ailerons start so a nice accurate cut was made then epoxy used for the joint. The angled portion was jigged to induce washout. The front spar was partially assembled so that everything is square as it holds the socket. Shear webs get added after the ribs are threaded in place.







wiecej...

[ARUP]

Thanks for looking, Bryan! I love working with that little hammer!

[BryanB]

I love craft metal work.

[ARUP]

Witamy! The first picture shows the spars, wing tube packing supports and two 1/4" ply root ribs which were cut tonight. The next series of pictures show how the wire TE will be captured. Aluminum tube segments were cut to length, slotted one end with a Dremel cut off wheel then the 'ears' of the tubes peened over a mandrel. The really blurry picture is supposed to show how a radius on the anvil was used to 'fine tune' the wire pass-through on the tube. These tube will get let into each rib and 1/64" ply either side will secure them. This worked well on the Charlotte so I'm using this method again!







The tubes were squeezed in the vise to the thickness of the ribs. In the last picture the two tubes on the right have their pass-through holes at an angle. These are the ribs next to the ailerons which are a little longer than the others.
Dobranoc!

[ARUP]

Csesc wszystkim! A tool was made to shape the wing tube shear webs. These shear webs will encapsulate the wing tube within the spar. The spars had a small segment glue to them so that this portion of the spar is as wide as the wing tube.





In the picture above you can see the wing tube cradled in half of its shear web. One done... a whole bunch more to go!
Dobranoc!

[ARUP]

Znowu ja! The aileron curved tips were sanded to smooth them out but they will need to be tapered in thickness, later. All the ribs were cut out and their noses were trimmed to receive the false LE. The two outermost aileron ribs were blocked up on their TEs to account for washout as they were pinned to the stack for the nose job. The false LE will lay squarely against them by doing this and not be twisted. 3/32" balsa Laminates for the swept portion of the LE were soaked in hot water then put on a form to dry. They get glued later. All the ribs are shown at their stations. There aren't many!







Pozniej!

[ARUP]

Ahahaha! That's right Gene... I might squeeze another clamp in there! Thanks for tagging along. This glider isn't very sophisticated but it's been fun so far... and builds pretty quick, too!

[Gene C]

There might have been room for another clamp in there somewhere, but that's how it's done. Watching your building step by step.

[ARUP]

Dzien dobry! Cookie tins were used as forms for the curved tips of the ailerons. 3/32" balsa was soaked in hot water (remember...no ammonia) then clamped onto the tins to dry. When dry the laminates were put together with aliphatic glue and are drying as I type.



Do widzenia!