1:3 Bohatyrew 'Motyl' of 1925

[gunny11]

Very cool...

[Gene C]

Awesome! Looking good.

[ARUP]

Znowu ja! The hard points were glued into the stab. Two are to mount the stab onto fuselage and two are for cables to attach. The cables and turnbuckles will get set up later. The fin and rudder outlines are made up of laminations just like what was done for the stabilizer and elevators. The wide one was cut in half length wise to make the two rear-most rudder curves. After the outlines were scarfed together and re-inforced with 1/64" ply at the joints the internal structure was put in place along with gussets and a rudder horn mount. Everything will get sanded fair once the glue has dried. The alignment pegs will get glued into the fin's bottom surface and corresponding holes will receive them in the stab.







PA!

[ARUP]

Dobranoc! All the edges have been rounded. The tail feathers will be removable. Pulling a hinge pin allows the elevators to be removed as the elevator horn is slid out of its 'drive tube'. The same set up was done on the Eaglet and works nicely. Here are the components loose, dry fitted then soldered and with the push rod clevis hole drilled.





The elevator horn's push rod end is canted forward to clear the fin post end of the fuselage. The 'drive tubes' will get let into the elevators as the hinges are installed.

Pozniej!

[ARUP]

Len, that ol' Vampyr is getting to be an 'Energizer Bunny'! It has definitely proved itself like a Timex Watch for those of you who remember those commercials! lol

[lenb]

Yeaaaaa Vampir..... Its just not an event until the little guy shows up on the flight line. Bravo Michael.

[ARUP]

The Vampyr is repaired after its last 'outing' and resting in its coffin storage box and the Eaglet fuselage is repaired after its hard landing at Clover Creek last year. It just needs right wing strut attachments repaired but that can't happen until I get some new Texaco stickers for the wing so that the 'approach' to repair can be figured out. Back to the Motyl! The stabilizer and elevators were sanded flat then the elevators were unpinned from the stab then pinned together and sanded for symmetry. They need their edges rounded.



Dobranoc!

[ARUP]

Waddaya say, Porter! I may end up with a 'keeper' like the goofy Vampyr! Be sure to make Horizon! What new bird do you have in the works?

[ARUP]

Thanks, fellas! These things get a little 'piece-y' at times.

[gunny11]

Yes, +1 on the construction!

[airporter]

Mike,

You are a glutton for punishment. This should be a fun sailplane, or glider ?
Hope to see it fly this summer.
Keep up the good work.

Porter

[Gene C]

Looking good. Love the construction.

[ARUP]

Czekanie... waiting for the glue to dry! Reinforcements of 1/64" ply glued inside elevators at scarf joints. Measurements taken off fuselage mounting plates and transferred to stabilizer. Dowel rod 3/8" diameter will serve as hard points to mount the stab and 1/4" will serve for mounting the fin-stab-fuse cables. These will get drilled for bolts, later. When the glue has dried the structure will get sanded flat and fair. The TE of stab and LE of elevators are pinned together. Once structure sanded flat then it gets taken off board to sand the perimeter. The fin and rudder get built next!







Do zobaczenia pozniej!

[ARUP]

Dzien zabawy!
The glue has dried so the 'double width' elevator parts were sawn in half lengthwise. You can see how wide one elevator laminate is compared to the LE laminate, which doesn't get cut.





The elevators are almost done! Hinging and the control horn follow!
Do widzenia!

[ARUP]

Witamy! The wing plans were drawn. An order for spruce cap strip material from Aircraft Spruce will serve as the spars. I need wider stock to fit the 20 mm wing tube. So... since I'll have to wait for the spars to arrive the stab and elevator plans were drawn. Some 1/4 scale Hansa Brandenberg KD 'Startstrutter' blue foam forms were re-purposed. One for the KD rudder fits the outer elevator curve and the KD fin form fits the inner elevator curve. The seven 1/16" laminations are cut double width so that after gluing they can be cut lengthwise to have mirror image parts. The stab LE form is custom cut and the five 3/32" laminations are slightly more than 3/8" wide. The extra width allows for sanding them fair. The balsa laminates were soaked in hot water then clamped to the forms to dry. They will be taken off the forms for gluing, later. Don't use ammonia for it destroys the lignin in the wood unless you don't care if the wood is weakened such as might be needed for non-structural details. The pictures show the forms with the wood clamped. The form are laid over their respective places on the plan.





Kolejny dzien!