DIY Full scale replica of a Axial D262 Luftschraube


#1

So… Have I finally lost my marbles…?
I got the material for my dream project today.
A full scale replica of the propeller used on the Fokker Dr.I, made famous by the ‘Red Baron’, Manfred Von Richthofen, during WWI.
I have got the drawings from Achim Engels, a gentleman who built several WWI aircraft, from scratch.
The drawings have been redrawn in CAD software and printed in full scale. Each of the seven layers (4 walnut and 3 birch) will be cut according to the profile, thus minimizing the work needed to shape the propeller.

The material.

The 3D CAD drawing

The full scale profile drawings

The waterslide logo decals


#2

Oooh that is fun! Will you make straight cuts or angled cuts to cut down(haaah!) on the sanding work? Wood is such a nice material to work with!


#3

Straight cuts, to facilitate clamping when glueing.
And then I will go easy with hand tools only! Don’t want to risk taking too much off with a power tool.

Wood is wonderful! The delicious scent of the walnut hit me like a sledgehammer when I opened the shrinkwrap plastic, surrounding it. I had a carpenter select the wood and plane it for me, as I don’t have tools for that.
The laminates are 20 mm thick.
The widest part of each laminate is the hub, which is 210 mm in diameter. Standard plank width is 150 mm or 250 mm. The price for dried, knot free 250 mm planks is astronomous. The carpenter suggested using 150 mm planks and glue extensions around the middle. That would save me 30-40% on the cost, including the workmanship of the carpenter.
I asked him how he would go about the glueing of the extensions. Would he plane the planks first, and then glue them, or glue first and then plane…?
Neither, or both. He planed the planks to 22 mm, to facilitate matching of the wood fibers…! He then glued them and planed the last 2 mm. :astonished:

The outer walnut laminate is single piece. I doubt anyone will be able to spot the extension joints.


#4

That is absolutely fascinating! One of my teachers use to make wood airscrews and enjoyed talking about it. It really is a bit of an art form!


#5

Fun fact!

The carpenter, whom I bought the material from, suggested glueing extension around the hub, to save money.
Yesterday I learned that they often did this when making real propellers during WWI as well! I had no idea when the carpenter suggested it… :slight_smile:
Thinking about it, extensions around the hub makes perfect sense. The rotational forces are relatively small, and the propeller axis hub clamps it together.


#6

YES! Another fun project from Troll! This is epic and will make the ultimate wall décor. All that sanding will keep you warm in the fall. Fall starts next week in Sweden, Yes? :slight_smile:
BTW, I will be in Uppsala next week. Where is my jacket?


#7

I believe so, yes.
However, I live in northern Norway. Winter ended last week, summer is today and it’s winter next week again…
:wink:


#8

I guess you call people from Uppsala “snow birds”. That’s what we call Americans from the north who move to Florida. :slight_smile: I am looking forward to seeing this prop.


#9

I have posted a blog on facebook, for those so inclined.
Join up if you like.
I will post about the progress here as well.


#10

Finished cutting the layers today.
With a bit of imagination, it starts to look like a propeller… :wink:


#11

Absolutely brilliant.

Strange, it has been something I have always wanted to do, myself. My dad had a certification to make wooden airscrews (sort of a requirement, when he was in Halton in 1936). I think he called it and “X” Certificate, but I cannot be sure. His descriptions used to be exactly as I see being done here. Why I wanted to do this is because I still haven’t totally given up on a wish to build an SE5a one day. LOL!


#12

This is a very and most rewarding activity with building wooden propellers-replicas of the early 1900.
I’ve made five British (Sopwith Camel) and German ( mainly Fokker D VII) for decoration and all look marvelous. The real problem is to obtain the original drawings. Since propellers of many dimensions are a commercial item sold via Internet no-one is willing to grant the scaled drawings and the DIY activist. Obtaining the wood planks is another difficulty and the many many clamps necessary for
gluing the planks cost a fortune.
Your work looks wonderful and the photos are so beautiful and most descriptive.Zooming and …scanning on them I have cleared some doubts in mind.
I myself tried to obtain the original drawing through Mr. Achim Engels (Fokker team) but I didn’t success. I wonder if I could ask for the Fokker Axial air-screw drawings. It would be greatly appreciated and viewed with great gratitude. Keep-up this excellent work. Thanks for the hospitality.


#13

Thank you for your interest in this project!
I’m sorry, but I don’t feel comfortable releasing Engels drawings since it’s his copyrighted material.
You can ask him yourself, if you have a facebook account.
I sent him a message via facebook and asked him if I could buy the drawings. He answered me that he doesn’t sell them anymore. But he suggested swapping the drawing for model kits. I agreed, and he sent me the drawing and asked me to send him some kits, equal to my percieved value of the drawing :slight_smile:
So I sent four plastic model kits.


#14

I feel I should end this thread with a selfie and proof of the completed project.
I’m sorry I didn’t update it more often, but the blog saw regular updates, at least :slight_smile:


#15

Your finished project looks amazing Troll. Well done Sir.


#16

Daddy Likes!! You have good hands my friend…


#17

Very nicely done! Just stumbled accross that forum and read your posts. I am happy to have been of help. It certainly looks great in your home!


#18

Hello, Achim! :slight_smile:
It really is a beautiful propeller!
Thanks so much for the plans and helpful hints.