Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Safer stooge ideas? Cox_ba12




Safer stooge ideas? Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Indexing COX cylinders
by balogh Today at 1:10 am

» 1/2a Skyray plans?
by 944_Jim Yesterday at 10:14 pm

» Postage stamp backplates
by JPvelo Yesterday at 8:52 pm

» my attempt at making an exhaust throttle for Cox .049
by roddie Yesterday at 8:20 pm

» Another of C.T. engines cleaned ---- Cox Tee Dee .09 --- Just today (3/26/2024) more Cox parts
by sosam117 Yesterday at 6:58 pm

» Cosmic Winds, - Big Guy, Little Guys, Silver Guy and Wounded Guy.
by rsv1cox Yesterday at 5:18 pm

» My friend Ramón, his Cox .09 & Cox .010
by MauricioB Yesterday at 12:31 pm

» Introducing our Cox .049 TD Engines
by Cox International Yesterday at 12:27 pm

» Parts Cox TD-4
by rsv1cox Yesterday at 8:40 am

» STUKA bomb dimentions needed
by latole Yesterday at 7:43 am

» On ebay a very special Cox engine
by davidll1984 Yesterday at 6:32 am

» Introducing the new - "QZ" RR-1
by Admin Yesterday at 12:51 am

Cox Engine of The Month
March-2024
balogh's

"COX Budapest" .049 engine



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Safer stooge ideas? Empty
Live on Patrol


Safer stooge ideas?

Go down

Safer stooge ideas? Empty Safer stooge ideas?

Post  Cajun66 Sun Mar 09, 2014 10:23 am

Yesterday I got set up behind the house for my Ringmaster's maiden flight and after one successful flight, I had a sobering incident. Having never done this type of launch before nor even seen one, I have to guess at everything. My release is 2 1/8" eyelets 1" apart with a 3" pin. After making sure the pin was in place, I cranked the engine for my first flight. In hindsight, I now see my first mistake. My wire stay that attaches the tail to the stooge was mounted too low on the plane (in the plywood tail skid) allowing the tail to lift off the board when the plane is pulling against the release. That launch went smoothly. The second did not. After getting reset, I started the engine and this time the tail began to hop up and down pretty hard because of the unrestrained elevator in the propwash. I immediately tried to steady the plane so I could pinch the fuel line but before I could put my hand on the fuse, the stooge (apparently) vibrated loose allowing the plane to accelerate into my right knee.
I got a hole in my jeans, a broken prop and spinner, and 3 minor but painful scrapes on the side of my knee.

First, I'm going to re build the wire stay so that the pull of the plane holds the tail against the board, or that, one it's pinned, doesn't have room to move.

Second, I'd like to come up with a better pin release. Something less vulnerable to vibration.

Im open to suggestions..
Cajun66
Cajun66
Silver Member
Silver Member

Posts : 75
Join date : 2014-01-03
Age : 49
Location : Baton Rouge, Louisiana

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cajun66 Sun Mar 09, 2014 10:40 am

A spring loaded pin sounds good..
Safer stooge ideas? Stooge-DSCF0029
Cajun66
Cajun66
Silver Member
Silver Member

Posts : 75
Join date : 2014-01-03
Age : 49
Location : Baton Rouge, Louisiana

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cribbs74 Sun Mar 09, 2014 10:57 am

I have some ideas, but before I do can you take a picture of your stooge with the plane attached?  It would help to see what you are dealing with.

Ron

Edit: glad you are ok, must have been a scary moment.
Cribbs74
Cribbs74
Moderator

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 11892
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Fireball Sun Mar 09, 2014 11:05 am

I'm sorry, I have a real good one I made and like. Tried to post it here but it didn't work. I am a member of Brotherhood of the Ring and have it in my RMS/OTS album. I'm listed as Fireball there also. You have to be a member to get in and it doesn't cost anything. Really good people over there and lots of experienced help.


Last edited by Fireball on Sun Mar 09, 2014 11:29 am; edited 2 times in total (Reason for editing : The image did not come through. http://www.brotherhoodofthering.info/mbbs22/photos/show-album.asp?albumid=94&photoid=1783)
Fireball
Fireball
Moderate Poster
Moderate Poster

Posts : 25
Join date : 2013-09-25
Age : 65
Location : Memphis, TN

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  roddie Sun Mar 09, 2014 12:22 pm

Hey Matt, Have you looked through this thread yet?
https://www.coxengineforum.com/t5577-my-simple-1-2a-stooge?highlight=STOOGE

It will give you some ideas for building another stooge or modifying the one you have. The 1st post in that thread is mine, and the photo shows a stooge that I built for 1/2A airplanes.

A spring-tension release pin is a must!! I purposely build my airplanes with a substantial tail-hook to accept a stooge-pin. For your airplanes that have a tail-wheel, you can make a stooge-link the same way you'd make a lead-out.. only shorter (i.e. a short length of .031" stranded cable with loops on each end, and a line connector for attaching to the tail-gear. The tail-wheel acts as a washer.) This may however; exacerbate the condition you were experiencing with the tail bouncing... but at least the model is locked-in until you're ready to release it.

Here's a stooge-link that I made from music wire. A line-connector would allow for swapping between different airplanes having tail-wheels.

Safer stooge ideas? 1-2-1411
roddie
roddie
Top Poster
Top Poster

Posts : 8155
Join date : 2013-07-17
Age : 64
Location : N. Smithfield, Rhode Island

http://www.stilburnin.com

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  roddie Sun Mar 09, 2014 12:55 pm

I plan to build another 1/2A stooge that has a guide-rail extending forward, for the in-board front wheel to ride against. When you run to the handle and check your controls; sometimes the nose of the model slides... and pulls-in. A guide-rail would prevent this, and keep the model at 90 degrees to the lines until it's released. I'll probably use 3/8" square hardwood stock for this, to clear the axle.
roddie
roddie
Top Poster
Top Poster

Posts : 8155
Join date : 2013-07-17
Age : 64
Location : N. Smithfield, Rhode Island

http://www.stilburnin.com

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  SuperDave Sun Mar 09, 2014 1:49 pm

Although I don't call our grandchildern "stooges" they love to hold my C/L planes prior to launch.   Laughing 

Just came inside from doing that very thing.

Yes Duke get out there and do it it's nice outside!  Clapping 

SD
SuperDave
SuperDave
Rest In Peace
Rest In Peace

Posts : 3552
Join date : 2011-08-13
Location : Washington (state)

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cribbs74 Sun Mar 09, 2014 2:50 pm

Matt,

Still would like to see a picture of yours as it may just need a minor modification to make it more functional and safer.

I do not use a stooge with my large planes, but do with 1/2A. Not saying I wouldn't it's just I always fly the bigger stuff with other folks.

My experience with stooges is very good. However, it's easy to go wrong in a hurry. I never take my hand off the plane until I am ready to go to the handle. I always make sure the engine is not running where it is surging back and forth. When I do take my hand off the plane I do it slowly to make sure the plane is still attached to the release pin.
Cribbs74
Cribbs74
Moderator

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 11892
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cajun66 Sun Mar 09, 2014 5:32 pm

This is what I started with:

Safer stooge ideas? 97D67DB5-072C-4D40-963B-1284883C48E1_zpsdvaaguo6

This is what I came up with during today's foul weather:

Safer stooge ideas? 0940AB75-ED3F-448D-A430-2D53887AD6CA_zpskuy8xh34

It's hard to see, but there's a brass eyelet in the tail skid of the plane. I'm going to add a tail wheel soon.
Cajun66
Cajun66
Silver Member
Silver Member

Posts : 75
Join date : 2014-01-03
Age : 49
Location : Baton Rouge, Louisiana

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cribbs74 Sun Mar 09, 2014 8:28 pm

That should do it.

Cribbs74
Cribbs74
Moderator

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 11892
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cajun66 Sun Mar 09, 2014 9:05 pm

Cribbs74 wrote:That should do it.


I hope so. 9 out of 10 times I fly, I'm alone. Except for my kids they're a little intimidated by the nitro engine for now.
Thanks a million for the input.
Cajun66
Cajun66
Silver Member
Silver Member

Posts : 75
Join date : 2014-01-03
Age : 49
Location : Baton Rouge, Louisiana

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cribbs74 Sun Mar 09, 2014 10:52 pm

I sent you a PM concerning your Ringmaster.
Cribbs74
Cribbs74
Moderator

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 11892
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Mark Boesen Sun Mar 09, 2014 11:04 pm

Nice! I'd think about making that pin a little longer, you don't have much for a safety factor if you'd accidently tugged just a little bit on the string. I used a longer skewer slightly bent, so it took a definite pull to release, you could do the same with spring.
Mark Boesen
Mark Boesen
Top Poster
Top Poster

Posts : 3976
Join date : 2011-09-01
Age : 65
Location : Rockford, Il

http://groups.yahoo.com/group/049Collectors/

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cajun66 Mon Mar 10, 2014 4:41 am

Good idea.
Cajun66
Cajun66
Silver Member
Silver Member

Posts : 75
Join date : 2014-01-03
Age : 49
Location : Baton Rouge, Louisiana

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Mark Boesen Mon Mar 10, 2014 8:09 am

maybe just move first eyelet to right?
Mark Boesen
Mark Boesen
Top Poster
Top Poster

Posts : 3976
Join date : 2011-09-01
Age : 65
Location : Rockford, Il

http://groups.yahoo.com/group/049Collectors/

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Kim Mon Mar 10, 2014 9:56 am

You might also think about using a chunk of peg-board for your base. I got a bunch of the stuff when the airport remodeled (I'm a shameless dumpster diver!).

With 1/2A planes and such, it works fine all by itself, and I use wire tent stakes to hold it in place for launching larger planes. It even works well when I fly from the concrete ramp at the airport, as I can select the holes that line up with section lines.

I also pack along a battery-powered screwdriver and firring strips for "side-wheel chocks" as guides to keep the plane from dancing around on the board, AND allows me to take up the tension in the lines without pulling it toward me at launch. The electric screwdriver lets me quickly move the strips around to match the landing gears of different planes...

Safer stooge ideas? 2_42

Safer stooge ideas? 1_118

Safer stooge ideas? Corsai10
Kim
Kim
Top Poster
Top Poster

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 8509
Join date : 2011-09-06
Location : South East Missouri

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cajun66 Mon Mar 10, 2014 12:57 pm

I like the pegboard. I'm using 1/4 ply with 4 3/8x6" nails.
I'm really digging the wheel guide idea.
Cajun66
Cajun66
Silver Member
Silver Member

Posts : 75
Join date : 2014-01-03
Age : 49
Location : Baton Rouge, Louisiana

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cajun66 Mon Mar 10, 2014 1:07 pm

Mark Boesen wrote:Nice! I'd think about making that pin a little longer, you don't have much for a safety factor if you'd accidently tugged just a little bit on the string. I used a longer skewer slightly bent, so it took a definite pull to release, you could do the same with spring.

I just bought some more music wire. I have longer springs as well. I think you're on to something.
Cajun66
Cajun66
Silver Member
Silver Member

Posts : 75
Join date : 2014-01-03
Age : 49
Location : Baton Rouge, Louisiana

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cribbs74 Mon Mar 10, 2014 1:28 pm

Matt,

Here is a picture of my stooge. I copied Kims' setup. I used 1/4x1 strips as wheel stops.

Safer stooge ideas? T0p71jnl
Cribbs74
Cribbs74
Moderator

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 11892
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Cajun66 Sat Mar 15, 2014 10:47 am

Mark Boesen wrote:Nice! I'd think about making that pin a little longer, you don't have much for a safety factor if you'd accidently tugged just a little bit on the string. I used a longer skewer slightly bent, so it took a definite pull to release, you could do the same with spring.

This is my revised release. Longer spring and more pin actually being used and a pretty stiff spring.

Safer stooge ideas? Image9_zps1c1d5cfd
Cajun66
Cajun66
Silver Member
Silver Member

Posts : 75
Join date : 2014-01-03
Age : 49
Location : Baton Rouge, Louisiana

Back to top Go down

Safer stooge ideas? Empty Re: Safer stooge ideas?

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum