|May 27, 2013, 09:53 AM|
This plane has always been a dream to me...
After reading a lot of build log and talking with some scratchbuilders , I decided to start my own project.
The scale size have been decided by two reasons:
1-the length of a nice retract I bought several months ago...
2-the room in my car...
So I drew her 2m long...and nose removable. I guess it will be easier to repair like that. The wings will be fixed I think, but there is possibility to change that to removable wings. The spanwidth will be 900mm. (I enlarged it a little)
There will be retracts, and maybe nav lights...
And of course: the nose will be dropable.
Definitely I choose prop to push this plane, because I want it fast, and tiny EDF wouldn't have done the job.
What about the wing airfoil? Well...That was the most tricky part...As Concordefan said about it, the real airfoil is not really available publicly. Also I always wondered if a mach-2 airfoil of 40m long is really suitable for a model...So I read a little about aerodynamic and drew my own profile with Xflr. It's reflex of course, and 4 o 6%.
I drew all the parts of it in a 3D software, and I simulated the weight. It's planned to weight under 2Kg. The brushless setup should handle that...(2X Turnigy 2836).
What about the materials? It's mixed plywood and extruded poly. A little fiberglass in some places. Now let me show you my drawing:
I didn't want to spend months cutting all the wood, so I found a hobby shop near my place. The guy has a laser cut table and his prices are rather low.
So I have them cut...Amazing job he did...(or his machine anyway....)
My first job will be to do the nose, as I guess it'll be the hardest part. The nose and the visor are all moved by a single servo like that. It took me a lot of time to find out the good length and angle, but Solidworks show me it's running smooth now.
The servo will be just behind the front passenger door of the plane. I'll have to make it openable for maintenance...The plywood structure is now cut. I plan to sand the nose in Styrofoam, guided by the plywood skeleton. Then fiberglass will be molded on top. The styro will be melted or popped out, and plywood will be reglued back in the fiberglass skin.
For now, I'm at the the very beginning...
To be continued...
|May 27, 2013, 11:40 AM|
well thanks guy...
@Demondriver, The sheets are laser cutted
I started to assemble the nose for the fun of it...
The parts fit perfectly
The aft part of the complete nose is just a jig for the hotwire. It will be cutted at the end and replaced by a dropable nose structure here under.
And this is the visor slided all the way down, hope it will work like that...
To be continued
|May 29, 2013, 01:45 PM|
I hotwired the nose....
Still a lot of sanding to do
I first cut some cube to fill between the plywood
Then the profile view is cut
The 2 half are joined
Then I precut the hinge of the drop nose
And then the top view was cut
I hope to start the sanding job maybe tomorrow...
|May 30, 2013, 11:42 AM|
Concorde was the aircraft that "got" me into aviation when I was about 4 or 5 years old. My parents sidetracked a trip to London just so I could watch one take off from the end of a runway at Heathrow, pre 9/11 of course. I don't remember what I saw, but boy do I remember the noise!
What livery are you going with? What about covering?
Best of luck,
|May 30, 2013, 02:11 PM|
You're a lucky man to have seen it in true Graeme...
I plan to glass the wing directly onto the styrofoam, or kraft paper and white wood glue...didn't choose yet.
The delivery will be Air France of course...(not very original 'cause I'm french...)
The nose is almost ready to be glassed....I now need to split the drop nose appart and glass it separately.
The hinge seems not bad...
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