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Fisher P-75 Eagle (Read 1453 times)
Reply #64 - Oct 7th, 2019 at 2:47pm

MKelly   Offline
Senior Member
Helotes, TX

Posts: 814
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That's fantastic AK!  I'm a sucker for a colorful natural metal scheme - you nailed it, and the unusual subject makes it even better.  You should really think about bringing some of your models to a FAC meet.

Mike
 
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Reply #63 - Oct 7th, 2019 at 1:57pm

neoflight   Offline
Full Member
...now how am I gonna
get that down!
West Tennessee

Posts: 201
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Spectacular model Smiley  Certainly looks like a stable flyer.
Neoflight
 
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Reply #62 - Oct 7th, 2019 at 1:33pm

Sky9pilot   Offline
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Stick & Tissue
Kelso, WA 98626 USA

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WoW....I'm blown away!!! Smiley Smiley
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #61 - Oct 7th, 2019 at 11:59am

Kerak   Offline
Senior Member
I Love YaBB 2.5 AE!
Roy, Utah

Posts: 2285
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Beautiful, Alf...doesn't get any better than that!  Love the spinner...even got the stars et. al...just beautiful. Smiley

Neal
 
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Reply #60 - Oct 7th, 2019 at 11:41am

alfakilo   Offline
Global Moderator
Retired USAF and TWA.
St Louis, MO

Posts: 943
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Aside from balancing, this one is complete. Came in at 30gms. I included the real world inspiration for the color scheme, a P-47 from the 358 Fighter Group, Germany, 1945.
 

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Reply #59 - Oct 6th, 2019 at 10:06am

Dan   Offline
Full Member
Navy veteran and A&P holder
Detroit Metro

Posts: 147
***
 
Both soup cans and cottage cheese containers are readily available to me, so maybe I'll practice with the sheet of 1/20" I bought. If I follow through with my somewhat outlandish idea to build a fleet of PC-6s, most will have scale props.
 

Building stick-and-tissue models is a hobby, not work.
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Reply #58 - Oct 6th, 2019 at 9:48am

alfakilo   Offline
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Retired USAF and TWA.
St Louis, MO

Posts: 943
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Dan wrote on Oct 6th, 2019 at 9:24am:
What is this "forming can" you speak of?


A technique for home-made props is to shape them over a form that will make an airfoil curved blade. Some use 'cylindrical tin cans' (regular soup can!), some use a tapered cylinder (often referred to as a cottage cheese or yogurt container). Some call this a 'bucket prop'.

See the prop section in this forum for articles on how to do this.

Not hard to do and combined with the Comet hub/spinner idea makes a fun and interesting project. Commercial props are probably more effective and much easier to use but making your own semi-scale prop can add much enjoyment to a build!
 
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Reply #57 - Oct 6th, 2019 at 9:24am

Dan   Offline
Full Member
Navy veteran and A&P holder
Detroit Metro

Posts: 147
***
 
alfakilo wrote on Oct 6th, 2019 at 8:38am:
After I glued the tissue on, I strapped the blade back on the forming can to keep the shape.

What is this "forming can" you speak of?
 

Building stick-and-tissue models is a hobby, not work.
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Reply #56 - Oct 6th, 2019 at 8:38am

alfakilo   Offline
Global Moderator
Retired USAF and TWA.
St Louis, MO

Posts: 943
****
 
Regarding the question of reinforcing prop blades, I've tried the idea of gluing tissue to the backside of the blade. Seems to work OK but may also tend to flatten the blade out a little. After I glued the tissue on, I strapped the blade back on the forming can to keep the shape. Worked pretty well.
 
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Reply #55 - Oct 5th, 2019 at 4:06pm

alfakilo   Offline
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Retired USAF and TWA.
St Louis, MO

Posts: 943
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I've watched those videos several times. Good stuff.

But I've had a problem with this method when covering fuselages that have considerable curvature both around and along the fuselage. The X-1 and P-75 both have this issue.
 
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Reply #54 - Oct 5th, 2019 at 3:21pm

New Builder   Offline
Senior Member
Amherstburg, Ontario, Canada

Posts: 1051
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Alf - Thanks for the link and this might be a good solution for my Interstate Cadet waiting for a propeller. Thanks again.
Mike
 

Have no fear of perfection - you'll never reach it. (Salvador Dali 1904 - 1989)
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Reply #53 - Oct 5th, 2019 at 10:58am

Sky9pilot   Offline
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Stick & Tissue
Kelso, WA 98626 USA

Posts: 10914
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Outstanding!!!  Some of the fellas will EDIT: glue/not blue tissue to the backs of the prop blades to add some strength without too much weight. 

As for the fuselage covering, I've had pretty good luck using the tissue wet and making relief cuts around the wing saddle and cockpit as I covered to get the contour.  Following Bern's wet covering technique, here's a link to the videos: Click Here
Tom
« Last Edit: Oct 5th, 2019 at 7:32pm by Sky9pilot »  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #52 - Oct 5th, 2019 at 10:05am

Kerak   Offline
Senior Member
I Love YaBB 2.5 AE!
Roy, Utah

Posts: 2285
****
 
I do think  you've got a lock on it, Alf!  Smiley  That prop is a creation of beauty all by itself.  Don't really know why...but every time I witness a Comet-style prop going together...I just get a big smile.  Grin  Maybe it's because I tried to build one as a kid...a big no-go...and to realize those guys really did know what they were doing.  Hey, and you've taken it even further!  Broadened its application!  Very nice work! Smiley

As for being able to fly your model...no doubt in my mind it will work.  It's all a matter of balance and rpm's to match the pitch.

Survivability...that's another matter, as it is for any wooden propeller, large or small.  NO PROP is intended to impact the earth.  How to toughen up those blades?

Great stuff, Alf...model is an eye-popper.  Shocked

Neal
 
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Reply #51 - Oct 5th, 2019 at 8:39am

alfakilo   Offline
Global Moderator
Retired USAF and TWA.
St Louis, MO

Posts: 943
****
 
Sure, look here! Go to page 5 of the thread.

https://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl?num=1557079827

I use this program to make the spinner/prop hub. I set the blades at a 62 degree angle (I measured the Comet angle for this, no idea if it is correct!!).

https://www.blocklayer.com/cone-patterns.aspx

Here is the pattern for the P-75. Using the blocklayer program, select 'lines' in the Draw box to present the lines in the picture that separate the 3 sections. Extend these lines to find the center point where they cross. Then draw a line from this center to the prop slot circle. Use this to measure the 62 degree angle.
« Last Edit: Oct 5th, 2019 at 4:02pm by alfakilo »  

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Reply #50 - Oct 5th, 2019 at 7:48am

New Builder   Offline
Senior Member
Amherstburg, Ontario, Canada

Posts: 1051
****
 
Quote:
Prop is another Comet type. 1/32" blades, card stock spinner with a balsa nose tip. Can't thank Neal enough for alerting us to this prop method, neat way of getting a semi-scale looking thing that might actually work!!

Went to my bookmarks for this thread but cannot locate it. Possible to link me back to the post?
Mike
 

Have no fear of perfection - you'll never reach it. (Salvador Dali 1904 - 1989)
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