Re: Propeller

[Jan Carlsson]

There is a computer design program on my web-page www.jcpropellerdesign.com
The program also content a help page. Also, Eric Clutton's booklet have some
good praktical tips.

best
Jan Carlsson

"AWV" > skrev i meddelandet
...
> I would like to try my hand at making my own wooden propeller. Anyone know
> of some good reference material, literature or guidelines that might help?
> Questions that come to mind are, for example:
> 1. What wood to use and how to prepare it.
> 2. Design guidelines
> 3. Finishing
> 4. Balancing
> 5. Fitting and drilling holes for bolts.
> etc.
> Andre
>
>

[AWV]

Thanx for all the info guys!
Now I've got some food for thought...

"Jan Carlsson" > wrote in message
...
> There is a computer design program on my web-page
www.jcpropellerdesign.com
> The program also content a help page. Also, Eric Clutton's booklet have
some
> good praktical tips.
>
> best
> Jan Carlsson
>
> "AWV" > skrev i meddelandet
> ...
> > I would like to try my hand at making my own wooden propeller. Anyone
know
> > of some good reference material, literature or guidelines that might
help?
> > Questions that come to mind are, for example:
> > 1. What wood to use and how to prepare it.
> > 2. Design guidelines
> > 3. Finishing
> > 4. Balancing
> > 5. Fitting and drilling holes for bolts.
> > etc.
> > Andre
> >
> >
>
>

[AWV]

Thanx Ron, Pete and Jan,
I have looked at all the web sites and I have ordered the Eric Clutton
booklet.
I can't wait for it to arrive!
I am very interested in the mathematics that model the "ideal" shape of the
propeller. (If such exist at all...)
I wonder how deep the Eric Clutton book will go into the subject.
I suppose I could just buy one of the software packages to help with my
propeller design, but I feel like a spoilt 2 year old saying: "I wanna... I
wanna...." all the time.
I wanna understand what I'm doing and I wanna work it out myself so that I
know exactly what's going on. Maybe after I've worked out my solution, I
will buy one of the software packages to check my result.
Anyone have any ideas with regards to the nitty gritty mathematical theory
around propellers?
Regards
Andre

"AWV" > wrote in message
...
> I would like to try my hand at making my own wooden propeller. Anyone know
> of some good reference material, literature or guidelines that might help?
> Questions that come to mind are, for example:
> 1. What wood to use and how to prepare it.
> 2. Design guidelines
> 3. Finishing
> 4. Balancing
> 5. Fitting and drilling holes for bolts.
> etc.
> Andre
>
>

[Jan Carlsson]

Andre,

There is an optimum propeller for every situation, RPM, Speed, and Power ...
purpose ...

In short, a propeller is always a compromise

When you have the book start with making a prop for the wall, you will learn
a lot of how to, and what tools that is needed.



Jan Carlsson

www.jcpropellerdesign.com




"AWV" > skrev i meddelandet
...
> Thanx Ron, Pete and Jan,
> I have looked at all the web sites and I have ordered the Eric Clutton
> booklet.
> I can't wait for it to arrive!
> I am very interested in the mathematics that model the "ideal" shape of
the
> propeller. (If such exist at all...)
> I wonder how deep the Eric Clutton book will go into the subject.
> I suppose I could just buy one of the software packages to help with my
> propeller design, but I feel like a spoilt 2 year old saying: "I wanna...
I
> wanna...." all the time.
> I wanna understand what I'm doing and I wanna work it out myself so that I
> know exactly what's going on. Maybe after I've worked out my solution, I
> will buy one of the software packages to check my result.
> Anyone have any ideas with regards to the nitty gritty mathematical theory
> around propellers?
> Regards
> Andre
>
> "AWV" > wrote in message
> ...
> > I would like to try my hand at making my own wooden propeller. Anyone
know
> > of some good reference material, literature or guidelines that might
help?
> > Questions that come to mind are, for example:
> > 1. What wood to use and how to prepare it.
> > 2. Design guidelines
> > 3. Finishing
> > 4. Balancing
> > 5. Fitting and drilling holes for bolts.
> > etc.
> > Andre
> >
> >
>
>

[Corky Scott]

On Thu, 3 Jul 2003 10:09:28 +0200, "AWV" > wrote:

>Thanx Ron, Pete and Jan,
>I have looked at all the web sites and I have ordered the Eric Clutton
>booklet.
>I can't wait for it to arrive!
>I am very interested in the mathematics that model the "ideal" shape of the
>propeller. (If such exist at all...)
>I wonder how deep the Eric Clutton book will go into the subject.
>I suppose I could just buy one of the software packages to help with my
>propeller design, but I feel like a spoilt 2 year old saying: "I wanna... I
>wanna...." all the time.
>I wanna understand what I'm doing and I wanna work it out myself so that I
>know exactly what's going on. Maybe after I've worked out my solution, I
>will buy one of the software packages to check my result.
>Anyone have any ideas with regards to the nitty gritty mathematical theory
>around propellers?
>Regards
>Andre

I think I have this book. If it's the one I'm thinking of, it wasn't
written for the kind of prop and horsepower I need and have.

It seemed angled toward direct drive, high speed props. The kind of
thing you'd see on direct drive Volkswagon engines.

When I tried to plot my 180 + horsepower engine at the top prop speed
of 2400 rpm, it was off the scale.

Corky Scott

[RJ Cook]

It's a screw, with an angle! :)

It is a straightforward design process, but with many related variables,
requiring clear-cut design criteria at the onset. The book should cover
them all.

RJ

"AWV" > wrote in message
...
> Thanx Ron, Pete and Jan,
> I have looked at all the web sites and I have ordered the Eric Clutton
> booklet.
> I can't wait for it to arrive!
> I am very interested in the mathematics that model the "ideal" shape of
the
> propeller. (If such exist at all...)
> I wonder how deep the Eric Clutton book will go into the subject.
> I suppose I could just buy one of the software packages to help with my
> propeller design, but I feel like a spoilt 2 year old saying: "I wanna...
I
> wanna...." all the time.
> I wanna understand what I'm doing and I wanna work it out myself so that I
> know exactly what's going on. Maybe after I've worked out my solution, I
> will buy one of the software packages to check my result.
> Anyone have any ideas with regards to the nitty gritty mathematical theory
> around propellers?
> Regards
> Andre
>
> "AWV" > wrote in message
> ...
> > I would like to try my hand at making my own wooden propeller. Anyone
know
> > of some good reference material, literature or guidelines that might
help?
> > Questions that come to mind are, for example:
> > 1. What wood to use and how to prepare it.
> > 2. Design guidelines
> > 3. Finishing
> > 4. Balancing
> > 5. Fitting and drilling holes for bolts.
> > etc.
> > Andre
> >
> >
>
>

[AWV]

Yup!
Thanx Jan, that's a good idea...
Make one for the wall....
I don't have one for the wall yet.
I'm sure the wife will appreciate... eh eh eh! :-)
Especially since my Sonerai's wings are already standing in our dining room!

"Jan Carlsson" > wrote in message
...
> Andre,
>
> There is an optimum propeller for every situation, RPM, Speed, and Power
....
> purpose ...
>
> In short, a propeller is always a compromise
>
> When you have the book start with making a prop for the wall, you will
learn
> a lot of how to, and what tools that is needed.
>
>
>
> Jan Carlsson
>
> www.jcpropellerdesign.com
>
>
>
>
> "AWV" > skrev i meddelandet
> ...
> > Thanx Ron, Pete and Jan,
> > I have looked at all the web sites and I have ordered the Eric Clutton
> > booklet.
> > I can't wait for it to arrive!
> > I am very interested in the mathematics that model the "ideal" shape of
> the
> > propeller. (If such exist at all...)
> > I wonder how deep the Eric Clutton book will go into the subject.
> > I suppose I could just buy one of the software packages to help with my
> > propeller design, but I feel like a spoilt 2 year old saying: "I
wanna...
> I
> > wanna...." all the time.
> > I wanna understand what I'm doing and I wanna work it out myself so that
I
> > know exactly what's going on. Maybe after I've worked out my solution, I
> > will buy one of the software packages to check my result.
> > Anyone have any ideas with regards to the nitty gritty mathematical
theory
> > around propellers?
> > Regards
> > Andre
> >
> > "AWV" > wrote in message
> > ...
> > > I would like to try my hand at making my own wooden propeller. Anyone
> know
> > > of some good reference material, literature or guidelines that might
> help?
> > > Questions that come to mind are, for example:
> > > 1. What wood to use and how to prepare it.
> > > 2. Design guidelines
> > > 3. Finishing
> > > 4. Balancing
> > > 5. Fitting and drilling holes for bolts.
> > > etc.
> > > Andre
> > >
> > >
> >
> >
>
>

[RobertR237]

In article >, Richard Riley
> writes:

>
>:Hope your wife is as understanding as mine has been over the years. I have
>:various parts to my plane stashed in almost every room in the house. My
>wife
>:had never complained and in fact has helped me find new places when the
>garage
>:got too crowded or I needed someplace safe to protect a completed part.
>
>My wife put up with naming the cat "EFIS" but isn't lettng "Amelia,"
>"Robin" or "Jenny" on the list for our baby.
>
>

Why not? Those are all great names for a baby but I must question the cat
"EFIS". It does mane me wonder though just what my wife is really asking for
when she says "give me a kiss".

Bob Reed
www.kisbuild.r-a-reed-assoc.com (KIS Builders Site)
KIS Cruiser in progress...Slow but steady progress....

"Ladies and Gentlemen, take my advice,
pull down your pants and Slide on the Ice!"
(M.A.S.H. Sidney Freedman)

[Jay]

Multiple related variables... compromise... Sounds like a great
application for Excel's Solver feature.

For those of you who aren't familiar with it- its a brute force
computional method for optimization. Basically it allows you to tell
Excel to optimize (maximize, minimize, or seek value) for a particular
cell by manipulated a group of algebraicly related cell given a group
of contraints such "radius can't be a negative quantity". Pretty much
anything that might be a short optimization program in a high level
language is a candidate for Solver.

[Andre]

OK sounds great thanx.
You mentioned a video?
Are these for sale and obtainable somewhere?

"dann mann" > wrote in message
...
> I carved a prop using the Clutton book as a reference. Realy just as an
> exercise to see how long it would take.
> I carefully selected the straightest clear Douglas Fir 6" by 72" from
> the Home Depot. Three laminations bonded with generous amounts of epoxy
> and clamps galore. I had just recently seen a video of people doing this
> and the basic layup is easy.
> Make a template for one blade. Cut shape on bandsaw. Follow directions
> in Clutton book for selection of pitch and other parameters. Buy
> yourself a nice block plane and some rasps and files.
> Carve away everything that doesn't look like a prop. Mine took about 8
> hours of carving. Balance was not real good
> I mounted it to a test stand mounted ultralight engine. It was pretty
> decent but a little shaky. Made a nice wall hanger and total cost was
> about 35 bucks.
>
>
>
>

[Dan Thomas]

I bought the newest copy of Aviation and Space magazine the other day
because it had a good article about wooden props, and how Sensenich
builds them. Really
good reading.
I have some material written by Raoul Hoffman about propeller
layout and carving, and plan someday to make another prop for my Jodel
using his articles. I think they were originally articles from the
good ol' days of Sport Aviation magazine, back when it had good, hard
info for the scratch-builder. I'll have to take a closer look. His
ideas make the whole process much simpler.
Dan

[dann mann]

Andre, I tried to email you directly. Bounced. Check with the San Diego
Aerospace Museum. I think one of the guys that does the restorations
there decided to document the prop making process. Those guys that make
the prop carving duplicator might have it too.
Good luck
Dan