Harbinger Build

[ARUP]

Blue is just too cool!

[Asher Carmichael]

Nice! Thanks for sharing

[Sled-Works 1]

I use the machine we have in our office model shop. Spec's....Its blue and has a 24" x 20" bed. Ha ha ha.

[ARUP]

Yes... does it remove unwanted hair? lol Yeah, David... let us see some specifications or is it proprietary?

[kjkavaney]

Good work there David...keep the flow going..
kevin

[Asher Carmichael]

David, really nice work. Would you mind sharing some info about your laser?

[Sled-Works 1]

Ha ha ha. Sometimes it works and sometimes it doesn't. I haven't had too much time to work on this bird this week but managed to get the stab drawn up and cut. Should go together quickly this weekend. I like the way the pieces interlock and align...and it seems strong enough. More to follow.

[Tango Juliet]

That's what you call, "Cutting it close!"

[ARUP]

Yessss! Excellent! I'm all the time 'scrappin' my planes together.

[Mosquito]

Nicely done David! That is very efficient.

[Sled-Works 1]

I'm planning to use the gussets on the trailing edge of the wings as was done on the original. Between the gussets and the carbon at the trailing edge, I believe it will be plenty strong and look much more scale than the typical balsa trailing edge most models have.

Had a funny thing happening while laser cutting over the lunch hour yesterday. I enjoy playing the game of trying to get as much out of my scrap balsa pieces as possible. I was trying to squeeze in an extra rudder piece, eyeballed it, and this happened.


I raised my arms triumphantly. Ha ha ha.

- David

[ARUP]

Those gussets impart amazing strength! The hinge point pockets is a great idea. Lining those things up can be a chore so your detail eliminates that headache.

[Sled-Works 1]

Ha ha ha. You got me at my own game Mike. Keep them coming please.

After all the drawing and cutting lately I needed to glue a couple parts together just to see some progress. Here are a couple shots of the rudder this morning.







The notches in the leading edge center piece are there to act as guides for the Robart hinges...that will come later.


Gusset pieces in place. I'm certain this is not a scale detail but the profile is scale and they really do work well. Very strong connection.


Now with a few of the diagonal bracing members and bottom balsa block in place. Next up is to add the leading edge balsa and sand to shape.

- David

[ARUP]

You know... foreboding...dread... alarm... 'the harbinger of things to come'! This is a Harbinger, right? Don't pay much attention to me because my sense of humor is weird!

[Sled-Works 1]

Not sure I follow you Arup, but right now I'm focusing on designing and making interlocking parts for the rudder and stab. The goal is to have the pieces come together in a way that holds them in place, makes guide holes for the Robart hinges, and interlocks them with other pieces for strength. In short getting more out of laser cut parts. Here is a typical sketch.