Propellers

User avatar
eta150
Member
Member
Posts: 269
Joined: Wed Mar 11, 2009 10:48 pm
Division: Grad
State: PA
Location: Kville
Contact:

Re: Propellers

Postby eta150 » Thu Dec 03, 2009 8:28 pm

At the risk of sounding like a fool, are the ikara props easily attached to the Ray Harlan assembly? And, if so, is there enough of a difference that it is worth it?
#ACESWILD

jander14indoor
Member
Member
Posts: 1466
Joined: Mon Apr 30, 2007 2:54 pm
State: -
Contact:

Re: Propellers

Postby jander14indoor » Thu Dec 03, 2009 10:09 pm

I find it easy to do. Cut the wire on the old hanger. Replace with new .020 (I think, should check) music wire.

I find it worth doing because I find the Ikara prop hanger flimsy and hard to attach properly. The Harlan is more robust and easier to attach to the plane. For me.

Even better than the Harlan SO hanger is the Penny Plane hanger which has a split tail allowing the prop to be changed without cutting the wire.

Jeff Anderson
Livonia, MI

User avatar
smartkid222
Exalted Member
Exalted Member
Posts: 774
Joined: Sun Jun 22, 2008 3:12 pm
Division: C
State: NY
Location: Western Long Island
Contact:

Re: Propellers

Postby smartkid222 » Fri Dec 04, 2009 12:27 am

eta150 wrote:At the risk of sounding like a fool, are the ikara props easily attached to the Ray Harlan assembly? And, if so, is there enough of a difference that it is worth it?


Are you comparing this:
Image
(is this what is considered the Ikara prop hanger)?

and the Ray Harlan assembly?

If that is the ikara prop hanger then: when i did WS i used the freedom flights kits which used the ikara prop hanger which worked fine. The prop fits well into the hanger. the hanger is glued fairly well into the Motor Stick, you just have to make a cut which a part of the hanger fits into. I dont know if it's much better using the ray harlan assembly. I dont see any benefit except for less weight, but for WS the weight limit is easy to get close to.
Also thinking about Jeff's comment, the ikara prop hanger makes the prop detachable.
For the Harlan SO thrust bearing you can use .020" music wire for the prop shaft
for the Harlan Penny plane the hole is SMALLER, so you need less than ~ .017" MS
Image 2008 NY BLG Champ
2010 NY Helicopter Champ

User avatar
eta150
Member
Member
Posts: 269
Joined: Wed Mar 11, 2009 10:48 pm
Division: Grad
State: PA
Location: Kville
Contact:

Re: Propellers

Postby eta150 » Fri Dec 04, 2009 6:55 pm

thanks, that really helps
#ACESWILD

calgoddard
Member
Member
Posts: 214
Joined: Mon Feb 26, 2007 5:54 am
Contact:

Re: Propellers

Postby calgoddard » Fri Dec 04, 2009 7:14 pm

Yes - the image posted above shows the Ikara prop hanger from two different viewing angles (side view and rear perspective view).

At one time you could purchase prop hangers from a supplier named Geauga that were suitable for Wright Stuff planes. They were fabricated from a tiny block of Aluminum alloy that was precision milled. These beautiful pieces of workmanship were not subject to bending on frontal impact during flights and had a pig tail rear end that allowed removal and replacement of the prop. They were comparable in weight to the Ikara and Harlan SO prop hangers. A picture of the Geauga prop hanger is shown below. Personally I prefer the Geauga prop hanger.

calgoddard
Member
Member
Posts: 214
Joined: Mon Feb 26, 2007 5:54 am
Contact:

Re: Propellers

Postby calgoddard » Fri Dec 04, 2009 10:01 pm

I will try to post an image of the Geauga prop hanger again in this thread. If you can't see it go to the Image Gallery.


User avatar
smartkid222
Exalted Member
Exalted Member
Posts: 774
Joined: Sun Jun 22, 2008 3:12 pm
Division: C
State: NY
Location: Western Long Island
Contact:

Re: Propellers

Postby smartkid222 » Sat Dec 05, 2009 12:24 am

calgoddard wrote:I will try to post an image of the Geauga prop hanger again in this thread. If you can't see it go to the Image Gallery.



oh yeah. i've seen those before. the person who was showing it to me said it was some good stuff. never tired it personaly though. too bad they dont make them anymore.
Image 2008 NY BLG Champ
2010 NY Helicopter Champ

nemmissis
Member
Member
Posts: 1
Joined: Wed Dec 09, 2009 8:58 pm
Division: B
State: WA
Contact:

Re: Propellers

Postby nemmissis » Tue Feb 02, 2010 7:14 pm

Does anybody know how to make my plane better? It is a R.O.G shoebox model i need help with modfing it to work good any ideas??????? :mrgreen:
:geek:
:geek:
:geek:
:geek:
:geek:

andrewwski
Admin Emeritus
Admin Emeritus
Posts: 940
Joined: Sat Jan 13, 2007 3:36 am
Division: Grad
State: -
Contact:

Re: Propellers

Postby andrewwski » Tue Feb 02, 2010 7:35 pm

Not without a lot more information. To start, what's not working? How is your plane built/trimmed?
Please read Forum Rule #2:
2. Posts should have a legitimate purpose.

jander14indoor
Member
Member
Posts: 1466
Joined: Mon Apr 30, 2007 2:54 pm
State: -
Contact:

Re: Propellers

Postby jander14indoor » Tue Feb 02, 2010 9:24 pm

The ROG Shoebox model is a fine plane, but marginal to the WS rules, too small.

That said, put it on a diet. Use smaller wood cross sections and lighter wood than comes in the kit. Delete the landing gear. Lighten the prop. Select a lighter wing covering. WHATEVER it takes to get down to the rule minimum of 7.0 gms without rubber.

Use the maximum 1.5 gm of rubber, measure it yourself, what's in the kit isn't likely to be that amount. You'll probably need a larger cross-section than recommended in other places on this forum because of the small wing, but smaller than I remember being in the kit. It will fly nicely if you get it right, say 30 to 45 seconds, maybe a minute. Not much more than that.

Build and trim carefully per instructions in kit of course.

If you want something beyond what that model is capable of, start by reviewing the many messages already in this subsection of the board. Lots of hints and tips on better designs and longer flight times.

Thanks,

Jeff Anderson
Livonia, MI

StampingKid
Member
Member
Posts: 116
Joined: Wed Mar 25, 2009 12:37 pm
Division: B
Contact:

diameter of prop

Postby StampingKid » Mon Feb 08, 2010 6:00 pm

How is the diameter of the propeller measured? Straight across the axis along the spar or from far tip to far tip?
I WILL RETURN TO PHILMONT IN JULY!
07 Reg 1st BLG, 3rd WV.
08 Reg 1st Twr, 2nd BLG
State 1st Twr
09 Reg 1st WS, PSL and Crave the Wave, 2nd Robo-X, EB
State 1st EB, 3rd WS
10 Reg 1st EB, PSL, 2nd WS, Disease Det., 3rd Traj.
State 1st EB, PSL, 2nd WS, 3rd Disease Det.

User avatar
WrightStuffMonster
Exalted Member
Exalted Member
Posts: 62
Joined: Thu Sep 15, 2005 5:56 am
Division: Grad
State: AK
Location: the semi frozen arctic
Contact:

Re: diameter of prop

Postby WrightStuffMonster » Mon Feb 08, 2010 8:38 pm

StampingKid wrote:How is the diameter of the propeller measured? Straight across the axis along the spar or from far tip to far tip?
The diameter is measured straight across the axis. At nationals they have a slot that is 20cm wide that you have to fit your prop through.
Image-Alaska
Eagle River High School Class 09
Nationals:
1st Wright Stuff Kansas 07
1st Robot Ramble Washington D.C. 08
Stanford University Class 2013

User avatar
blue cobra
Exalted Member
Exalted Member
Posts: 417
Joined: Fri Apr 10, 2009 1:10 am
Division: Grad
State: NY
Contact:

Re: Propellers

Postby blue cobra » Tue Feb 16, 2010 1:49 am

I'm not understanding how you can remove your propeller from the pigtail prop hanger. If anyone has it, could they post a picture?
In full color since 2006

User avatar
WrightStuffMonster
Exalted Member
Exalted Member
Posts: 62
Joined: Thu Sep 15, 2005 5:56 am
Division: Grad
State: AK
Location: the semi frozen arctic
Contact:

Re: Propellers

Postby WrightStuffMonster » Wed Feb 17, 2010 9:26 am

blue cobra wrote:I'm not understanding how you can remove your propeller from the pigtail prop hanger. If anyone has it, could they post a picture?
I depends on how you bent your prop wire. The easiest way to figure out how to remove a prop from a pigtail bearing is to put the prop so that the rounded section where the oring goes is right against the pigtail and then rotate the wire while pulling lightly on the prop. If the wire is bent right it should come right out. Could you post a picture of your current set up? Sometimes it can be pretty tricky to get out if you are using larger diameter wire.
Image-Alaska
Eagle River High School Class 09
Nationals:
1st Wright Stuff Kansas 07
1st Robot Ramble Washington D.C. 08
Stanford University Class 2013

User avatar
blue cobra
Exalted Member
Exalted Member
Posts: 417
Joined: Fri Apr 10, 2009 1:10 am
Division: Grad
State: NY
Contact:

Re: Propellers

Postby blue cobra » Wed Feb 17, 2010 4:24 pm

I'm using the Ikara set-up. I don't have a pigtail bearing, but as I understand there is a .018" hole in the front (on the Penny Plane bearing) that you stick your prop shaft through and form your hook. But once you have your hook, you won't be able to get your prop shaft back out of that hole. Thus my confusion.
In full color since 2006


Return to “Wright Stuff B”

Who is online

Users browsing this forum: No registered users and 1 guest