My Home made propeller design software + Download + Video + Tutorial

HomeBuiltAirplanes.com

Help Support HomeBuiltAirplanes.com:

Pytoche

Member
Joined
Aug 9, 2011
Messages
5
Location
Colombia
This is my video tutorial about how to design, built and test a propeller with no money!

in the video, i am the guy with black t-shirt.

Application:

I also made an application for windows and Mac that helps you to find an aproximate static thrust, angles, diameter, rpm and chord for begin iterations. you can specify the diameter and press the Lock button and play with the other variables. if you want more trust and the textbox get highlighted, try to increase the diameter and decrease rpm. the software will compute the angles chord and everything for you.

I recommend to download Propcalc and test the outputs of my app there in a "BLade element Theory software". but of course that kind of software are just to analize performance of the predesigned thing.

Its a Pre Pre-Alpha Version so expect some bugs and of course if you can contribute with something, i will appreciate that.

Screen Shot:



The link to download the software:
Download MAC Version (2,5 Mb)
Download Windows Version (1,7 Mb)

If any of you are a linux user, Pm me and i will send you the link.
 
Last edited by a moderator:

superman

Member
Joined
Jun 14, 2011
Messages
7
Location
Texas, USA
Wow nice video.

Lots of time and work involved in that. I never actually saw in the video (i may have looked over it). Did you actually balance the propellor, or did you not have to? Im curious because I assumed that propellors had to be totally balanced, with little tolerance. Lol funny that you were testing the engine just out at a busy public road intersection, and all all the shirtless people. =)
 

bflynt

Member
Joined
Nov 23, 2009
Messages
14
Location
Centennial, CO / USA
I like the ingenuity.
Takes some serious "cojones" to hold that test stand down and rev that thing up. Out of Balance or blade break, Oh My!!!
 

steze48

New Member
Joined
Apr 28, 2012
Messages
2
Location
Texas
Hello Pytoche...
I have been trying to download your Windows program but it stops about half way through with an error report...
Do you have another link?
Steve
 

steze48

New Member
Joined
Apr 28, 2012
Messages
2
Location
Texas
Hello Pytoche...
I have been trying to download your Windows program but it stops about half way through with an error report...
Do you have another link?
Steve

I also tried my Macbook with the same results...
I am looking for a program that I can type in the diameter and pitch and get the templates for each station from the center out to the tip...

Steve
 

Jan Carlsson

Well-Known Member
Joined
Jan 11, 2009
Messages
1,860
Location
Sweden
I also tried my Macbook with the same results...
I am looking for a program that I can type in the diameter and pitch and get the templates for each station from the center out to the tip...

Steve

Steve, My program do that, it actually calculate the diameter too, output is 7 airfoils along the blade, with beta angle, and position in X,Y and Z that give the wantet planform and shape.
JC Propeller Design

airfoil2.JPGMK2.jpg
 
Last edited:
Joined
Nov 7, 2012
Messages
5
Location
Johannesburg, South Africa
Can any of your guys help me design a variable pitch propeller that will be efficient at 30,000 ft? I want to re-engine my C337P to increase the HP from 225 hp to 300 hp. I would like to save weight on props. I can't afford MT's prices. I am thinking of using my standard Mc Cauly prop-hubs and simply adding better suited aerofoils made of wood and carbon fibre. Can anyone help?
 

SVSUSteve

Well-Known Member
Joined
Aug 20, 2007
Messages
3,904
Location
Evansville, Indiana
If you mean a certificated aircraft, you cannot do that without a STC. You would need a certified prop and engine combo as I understand it
 

Bart

Well-Known Member
Joined
Apr 13, 2007
Messages
308
Steve, My program do that, it actually calculate the diameter too, output is 7 airfoils along the blade, with beta angle, and position in X,Y and Z that give the wantet planform and shape.
JC Propeller Design

View attachment 21029View attachment 21030
Can your program incorporate bell shaped lift distribution per Prandtl 1933 theory as now researched by Albion Bowers at NASA?

This entails some sweep and extra twist at the tips, so the vortex is centered about 70% of span, with less induced drag. Bowers is doing flying wing research and design for a Mars glider, but may also be useful a propeller.
 

choppergirl

Banned
Joined
Jan 30, 2015
Messages
1,682
Location
air-war.org
My dad use to make the prettiest varnished boat paddles the same way, with sandwiched layers of wood glued together. Same idea, different shape. Bandsaw, belt sanders, table saws, spray guns all sitting idle in his kitchen cabinet shop, I need to get busy :) He offered to make me a propellor, maybe someday I'll get you to compute some numbers.

I tried to balance my front motorcycle wheel by just spinning it around... and tweaking it so there was no heavy spot. Didn't work out so well, now has that scalloped front tread wear on it. Maybe my weight fell of. I wonder if you could use a tire shop computer machine to balance a propellor?
 
Last edited:

Lendo

Well-Known Member
Joined
Feb 6, 2013
Messages
673
Location
Brisbane
I have that program, it's by Jan Carlsson of Sweden, it's very good but nor supported by Win 10, as Jan passed-on and probably no longer available. It wasn't his latest work which was kept for paid Consultative work.
George
 
Top