Aero L-39 Albatros V2 - EDF Jet

[Grifflyer]

Do you have the plans in a vector format I could use to import into AutoCAD to scale up and make the few changes to use this larger mount?

Sure!

 

[chris398mx]

I am checking the plan. the EDF hole is 53mm, perfect for the EDF itself, but it looks no more room for the intake ring.
Without it, you will lose a lot of power, roughly 30%.

View attachment 143579


View attachment 143580

How long and how much taper should the Thrust tube be to maximize thrust?

 

[Grifflyer]

How long and how much taper should the Thrust tube be to maximize thrust?

I run 80% fsa and however long the thrust tube needs to be, but I've read 4x the EDF's diameter is normally a good length. I don't know if that'll apply to the BDF, I'd ask @Splinter189 or @Mid7night to see what they've come up with.

 

[Guy S.]

67 degrees with calm wind in Illinois today 😀. And I’m happy to report a successful maiden of my L-39. It flies great, tracks very well. And the landing was much better than my first one. Really great job on the plane. Now I need to paint it up

 

[Grifflyer]

67 degrees with calm wind in Illinois today 😀. And I’m happy to report a successful maiden of my L-39. It flies great, tracks very well. And the landing was much better than my first one. Really great job on the plane. Now I need to paint it up View attachment 156611

Awesome!! Any ideas on how you're going to paint it?

 

[Guy S.]

No idea. I 3D printed the wingtips out of orange PETG, so I’d like to keep the orange, and something else bright for visibility. I do want to do one with camouflage though.

 

[FoamyDM]

Nope, it's V2 that I'll be building... 2.1 is the latest, correct? @Grifflyer

 

[Grifflyer]

Nope, it's V2 that I'll be building... 2.1 is the latest, correct? @Grifflyer

Yes sir.

 

[BATTLEAXE]

Yes sir.

Have you flown yours since the maiden?

 

[FoamyDM]

Yes sir.

Merci Beaucoup

 

[Grifflyer]

Have you flown yours since the maiden?

Yup, got about 20 flights in her at the moment, haven't flown it since the snow started falling though...

 

[BATTLEAXE]

Yup, got about 20 flights in her at the moment, haven't flown it since the snow started falling though...

What size of ESC do you use on the 50mm EDF?

 

[Grifflyer]

What size of ESC do you use on the 50mm EDF?

40-45.

 

[jfaleo1]

40-45.

Mine is 30.

 

[whackflyer]

@Grifflyer sorry if I missed it, but is there a build guide somewhere for this bird? I'm going to mod the v2 as a pusher!

 

[Grifflyer]

@Grifflyer sorry if I missed it, but is there a build guide somewhere for this bird? I'm going to mod the v2 as a pusher!

Unfortunately no, I was going to do a build video, but the footage was pretty terrible. V1 and V2 are pretty similar so the old build guide should give you a pretty good starting point. If you're stuck on anything let me now and I should be able to help you out

 

[whackflyer]

Unfortunately no, I was going to do a build video, but the footage was pretty terrible. V1 and V2 are pretty similar so the old build guide should give you a pretty good starting point. If you're stuck on anything let me now and I should be able to help you out

Ok thanks!

 

[whackflyer]

@Grifflyer I'm having a hard time understanding how the turtledeck goes on. Any pics you got or an explanation would help.

 

[Grifflyer]

@Grifflyer I'm having a hard time understanding how the turtledeck goes on. Any pics you got or an explanation would help.

Okay so you build the turtle deck base and bevel it as per the plans, then line up the two score cuts on the turtle deck piece, with the edged of the turtle deck base. Next bend and glue the turtle deck to the turtle deck base, there should be excess foam that you trim off so that it's flush with the bottom of the turtle deck base.
That's the best I can do without pictures, let me know if you understood that. If not I can whip one up real quick and take some pics along the way.

 

[whackflyer]

Okay so you build the turtle deck base and bevel it as per the plans, then line up the two score cuts on the turtle deck piece, with the edged of the turtle deck base. Next bend and glue the turtle deck to the turtle deck base, there should be excess foam that you trim off so that it's flush with the bottom of the turtle deck base.
That's the best I can do without pictures, let me know if you understood that. If not I can whip one up real quick and take some pics along the way.

Ya that makes sense now thanks!