IMAC Double Build, Carden Pro 124" Extra 300 40%

[orthobird]

Been a bit of progress, since I have been running around all day, at work, and before work and after wards, I added some more time to Fuselage 1. Great Advice I received: DO not start on Fuselage 2, until I get Fuselage 1 all framed and the phenolics glued in. Once they are glued in, I can remove fuselage 1 from build table, and then start over with step 3, 4, 5, and 6 of the fuselage construction. SO far, for Fuselage 2, I have the TRUSS built, but it is not sheeted, and the plywood phenolic supports are not glued on yet.


SO here we are, back on Fuselage 1, and this is what has been done and completed this morning:

all of the top and bottom cross braces are glued in.

I used carbon fiber rods for the area under the canopy/hatch.

the top cross braces run in an opposite direction to the bottom cross braces. (this is on the plans).

here is to demonstrate the true and straight fuselage sides....

you can again see the canister tunnel and see the "straight" aspect of the bottom of the fuselage.

I like this picture! It is so cool!!! this is before the phenolics are glued in.

time to now start looking at the symmetry between the wing tube and stab tube and the fuselage. Will get into this more next.

 

[orthobird]

From the manual:


8. install the Tail Gear Mount and Tail Gear at this time. '

cannot do this step yet, as I am waiting for the tail wheel. As soon as it arrives (probably tomorrow), I will be able to do this step, however, I will not be around this weekend. going to our region's first IMAC contest of the year in El Dorado, Arkansas.


ok, moving on:


9. Trial fit the Fuse Socket and each Wing Panel. Adjust for proper alignment and a flush fit to the Fuse side. Install the Fuse Socket.


before i do step 9, I have to reassure that the stabs and wing tube phenolics will be square to the fuselage and to each other. SO measurements are made in both X and Y axis.

Any final adjustments need to be made now, before gluing it on, as once this is glued on, it is set.

 

[orthobird]

Ok, I am satisfied with my measurements, and will proceed to 1st do the wing tube. Once that is cured, then I will glue in the phenolic for the stab tube, and assuring that the stab tune is parallel to the wing tube in both axial and coronal planes. Can I say that?



I am making these donuts, using 1/8" thick plywood.

Here they are:

The glue (epoxy) is pushed in using the extension tips, and then the donuts help push the glue into the gaps between the motor box and the phenolic.

As soon as I set this, then I make sure again, with the wing tube inside the phenolic, that both sides are parallel or equidistant from the table top, and also from measurements to the front of F2 on both sides.

Next week, I will then do the stab tube phenolic.

Wish me luck this weekend...

 

[scruffmeister]

..is a unique epoxy, in that, where ever you put it, it will not run at all,

The name for this property of a fluid is just too cool to pass up... thixotropic.

https://en.m.wikipedia.org/wiki/Thixotropy

Good luck in the competition Cam, looking forward to more installments of the build as you're doing a grand job!

 

[orthobird]

Thank you very much.

No pictures were taken, as I said, this is addictive, and I thought I would do the next step next week, but, I went ahead and glued in the stab tube phenolic and sanded down the wing tube. This all came out perfect!


(EDIT< PICTURES ADDED)

the wing tube phenolic, post glueing, if i measure the distance from the top of the table to the bottom of the wing tube, using my E-caliper, is 0.06 mm off one side compared to the other!
I think that is acceptable.

this is equivalent to 0.002362205 of an inch.
which I calculate, over a 40 inch distance, is not even 1 mm off. SO we are good!

I then proceeded to do the stab tube phenolic.
I also made the similar donuts, and glued it all in.
Again, making measurements so that the rear stab tube is parallel to the wing tube, if you are looking at if from behind, and also, the distance from the TE of the Wing tube to the LE of the stab tube is same on both sides. And it is perfect, within 1/16th of an inch.

Got to pack up now and head on out.


servos have clearance.

Stab tube glued in. Need to remove the excess glue with a dremel.

top side of the fuselage...

wing tube phenolic and the donuts

stab tube and wing tube alignment

carbon fiber cross braces.

 

[Dirt]

Great build Cam, you make it look easy!!! One question though is just exactly HOW did you make those donuts?

 

[Pistolera]

Very nice Cam. Good luck this weekend.

On the Hysol....love the 9462. Very strong bonds. Quite often I just squirt some on a magazine (one of the few things the AMA rag is good for ).....then mix and apply with a BBQ skewer. Save on Hysol and tip waste. The tips are great when you need them though.

Cheers

 

[Rusty 73]

It's taking shape ,I like how you explained in detail all of your procedures your doing .
Best of Luck this weekend competing .

 

[BalsaDust]

I would have to find the link again but they make a very short tip for the hysol as well that doesn't waste as much when you throw the tip away.

 

[ROLLERMAN]

Hey Cam, great job dude and Good luck this weekend. Question Why the extra Donuts on the phenolics? Thanks