ALOFT: AH-100 Build (new title)

[G-man]

Building and sanding completed.
Got the covering on - Ultracote White and Flame Red.

 

[Wayne]

Looks great!

 

[Wayne]

Figured out a way to include the 1/32" plywood doublers for the tip joints: (spar webbing not shown)

I think that is all the further I can take this design for this software package. Next will be some manual drawing for the wing joiner assembly.

 

[Wayne]

One of the root ribs.. Just playing around.

 

[G-man]

Love it.
I do grow warm and fuzzy over well made balsa parts.

 

[Wayne]

Love it.
I do grow warm and fuzzy over well made balsa parts.

I should have stated that was just a rendering in the fancy CAD program. Making sure all the details came across.

 

[G-man]

Fancy indeed. It renders balsa grain pattern.

 

[Hawaii Sloper]

I've been looking to build a powered floater with a built up wing for some time.
I happen to have a Sig Riser 100 kit collecting dust. Wayne provided just the ticket with the Prelude fuselage.
Wayne's offer to produce a new built up wing design made it all the more enticing.
G-man has built the Riser combo, plus an OLY2 version. and put them both thru their paces.
A lighter wing design would complement the light weight Prelude fuselage.
The Riser plans show Phillips entry on the rib profiles, the birch leading edge dowels could be CF.
I assume the turbulators are a structual integrity issue, aside from preventing sag in the covering.
With so much wing surface area, maybe the weight is not the only issue to chase?
Support from vendors is so lacking these days, dealing with Wayne has been a joy.

I don’t know much about wing design or aerodynamics but I think the turbulator issue is an air flow one. I think the spar going to the top of the wing cause in effect a bump at that point interrupting the laminar airflow.
Does this then cause the airflow to separate sooner and thus decrease lift? Smooth laminar airflow would seem to increase lift a lot. But I could be totally wrong on that.

 

[Wayne]

Ahh, this might be a conversation for the aerodynamics thread as I'm not sure there is a simple answer.

I think my answer would be; "it depends"

Probably best if I leave the rest up to the experts.

 

[G-man]

Stick a fork in me, I'm done.
With the motor, ESC, and servos I had on hand, and a 2200 3-cell pack,
the CG settled smack dead center between the 90mm-98mm from LE that Sig recommends for the RISER-100 wing.

I go now to start on the build thread:

BUILD THREAD: Sig RISER-100 wing on Topmodel PRELUDE fuselage

BUILD THREAD: Sig RISER-100 wing on Topmodel PRELUDE fuselage

There are modelers among us who are enamored with fat-profile, long-chord, lazy day super-floater gliders, but who would be happy to have a prettier fuselage than those we build from the parts provided in the kit. Here is a path to that end: build yourself a classic open-bay wing from balsa...

forum.alofthobbies.com

And we wait for some clear skys for flight testing.

 

[JohnT]

Stick a fork in me, I'm done.
With the motor, ESC, and servos I had on hand, and a 2200 3-cell pack,
the CG settled smack dead center between the 90mm-98mm from LE that Sig recommends for the RISER-100 wing.

I go now to start on the build thread:

BUILD THREAD: Sig RISER-100 wing on Topmodel PRELUDE fuselage

BUILD THREAD: Sig RISER-100 wing on Topmodel PRELUDE fuselage

There are modelers among us who are enamored with fat-profile, long-chord, lazy day super-floater gliders, but who would be happy to have a prettier fuselage than those we build from the parts provided in the kit. Here is a path to that end: build yourself a classic open-bay wing from balsa...

forum.alofthobbies.com

And we wait for some clear skys for flight testing.

That's a really nice look G-man. Should be a fun fly.

John

 

[G-man]

Thank you John.
Since I flew my last one out of sight in Canadian wildfire smoke and haze, I was going for max visibility on this one.
I was inspired by an OLY-2 photo I found on the internet.
// Dave

 

[Sandman]

Dave, job well done.
I'm really inspired to finish up my identical build.
Having Dave's build thread to follow, is really helpful.
The Prelude/Riser combo looks like the real deal.

Don

 

[Wayne]

Spent the holidays refining my CAD skills and drawing up a rough version of the wing joiner assembly:

My back went out after launching a buddies 4 meter glider and I just could not sit at a computer anymore. Still more detailing and refinement to come. All of this is hidden by the sheeting of the first bay. The shear webs in the second bay will also be part of the assembly. All critical alignments should be contained in this one assembly. Leading edge pin, wing bolt and wing joiners all tied to the spar caps and ribs.

 

[G-man]

> All critical alignments should be contained in this one assembly.
> Leading edge pin, wing bolt and wing joiners all tied to the spar caps and ribs.

How very cool.
Utterly exquisite solution.

 

[Sandman]

I agree, that's one fine design.
Modular, light, and strong.

 

[Wayne]

We are printing the first sample of the wing joiner assembly. Imagine we can cut the wood early next week if things go smoothly.

 

[G-man]

Wowee zowee. Very impressive.
I'm excited.

 

[Sandman]

I like how you incorporated the LE pin receiver into the joiner, quite the trick unit.

 

[Wayne]

First sample printed out. Overall very good. Need to adjust some tolerances and move the wing bolt further back. Very pleased with the strength!