Logo
Builders' Plan Gallery  |  Hip Pocket Web Site  |  Contact Forum Admin (Account/Technical Issues)  |  Contact Global Moderator
November 30, 2021, 09:54:57 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with email, password and session length
 
Home Help Search Login Register
Pages: [1]   Go Down
Print
Author Topic: Silly Putty timers  (Read 1269 times)
0 Members and 1 Guest are viewing this topic.
outofbalance
Gold Member
*****

Kudos: 18
Offline Offline

United States United States

Posts: 429

Topic starter


Ignore
« on: June 10, 2009, 09:14:34 PM »

Hi Folks:

A long time ago I saw a design for a d/t silly putty timer that used a rubber band at one end and a trailing hook at the other to pull a nail or large headed pin (or some wire contraption) through an aluminum tube packed with silly putty. I know a little about radial action s/p timers; I want to learn about and try to make a linear style. Thanks in advance.

Outofbalance
Logged
DaddyO
Platinum Member
******

Kudos: 61
Offline Offline

United Kingdom United Kingdom

Posts: 1,448




Ignore
« Reply #1 on: June 11, 2009, 02:56:17 AM »

Hi OoB - don't know if this was the article you refer to... Undecided

http://vintagemodelairplane.com/pages/Downloads/CRB_Tasters/SillyPutty01.html

Ray's site is worth a good look for S&T folks. I've just made a couple of these for my latest Senators which are almost ready to install
Logged

There cannot be a crisis today, my schedule is already full
outofbalance
Gold Member
*****

Kudos: 18
Offline Offline

United States United States

Posts: 429

Topic starter


Ignore
« Reply #2 on: June 11, 2009, 08:24:48 AM »

Hi DaddyO:

I built this rotary timer some time ago. I made it too long and the pulling arm rubber was at such an angle, it misaligned the tubes and finally refused to turn. But, when it was working, it was a good design I thought. I won't abuse the next one I build. Learned my lesson.

Still looking for a linear action silly putty d/t design.

Thanks,

OOB
Logged
Olbill
Titanium Member
*******

Kudos: 71
Online Online

United States United States

Posts: 2,635



Ignore
« Reply #3 on: July 17, 2009, 01:12:04 PM »

Would this work?
Attached files Thumbnail(s):
Re: Silly Putty timers
Logged
BG
Platinum Member
******

Kudos: 87
Offline Offline

Canada Canada

Posts: 1,793


Me with F1B - epic retrieval (flew 10km after DT)


WWW

Ignore
« Reply #4 on: July 17, 2009, 01:48:14 PM »

Bill,
How would release occur?
B
Logged

CEO,Chief designer, production line manager, factory worker, shipping and customer service manager, and janitor at Hummingbird Model Products.
Olbill
Titanium Member
*******

Kudos: 71
Online Online

United States United States

Posts: 2,635



Ignore
« Reply #5 on: July 17, 2009, 04:46:03 PM »

Hey - I'm an indoor flyer! Don't ask me hard questions.

The outer tube would be glued to the model and a wire or string would go from the right side of the timer piston to whatever your DT mechanism looks like.
Logged
BG
Platinum Member
******

Kudos: 87
Offline Offline

Canada Canada

Posts: 1,793


Me with F1B - epic retrieval (flew 10km after DT)


WWW

Ignore
« Reply #6 on: July 17, 2009, 05:16:04 PM »

Yes but you seem to have the inner tube attached to a spring on the left side so how would the DT actually be released?? If you have the spring pulling everything to the left and the DT line pulling everything to the right?

B
Logged

CEO,Chief designer, production line manager, factory worker, shipping and customer service manager, and janitor at Hummingbird Model Products.
HatzLymanC
Silver Member
****

Kudos: 7
Offline Offline

United States United States

Posts: 149



Ignore
« Reply #7 on: July 17, 2009, 05:57:59 PM »

"If you have the spring pulling everything to the left and the DT line pulling everything to the right?"
I think what is marked DT line, should actually read DT release line.

Lyman
Logged
Dave Andreski
Titanium Member
*******

Kudos: 82
Offline Offline

United States United States

Posts: 3,052




Ignore
« Reply #8 on: July 17, 2009, 06:50:36 PM »

Here's an 'antique' putty dt from American Aircraft Modeler, May, 1970. Not exactly what you are looking for but, maybe useful with some slight mods.

Somewhere in my collection of NFFS Digests I have info on the 'linear' putty DT you mention but, I don't have it scanned and will have to search for it/them.

Dave Andreski
Key West, FL
Attached files Thumbnail(s):
Re: Silly Putty timers
Logged

Aspire to inspire before you expire.
Olbill
Titanium Member
*******

Kudos: 71
Online Online

United States United States

Posts: 2,635



Ignore
« Reply #9 on: July 17, 2009, 07:18:35 PM »

I'm not very knowledgable about outdoor stuff so this is just a sketch showing the basic idea of the timer I drew above. Whether it will actually work I can't say - but I have silly putty and a model to put it on.
Attached files Thumbnail(s):
Re: Silly Putty timers
Logged
BG
Platinum Member
******

Kudos: 87
Offline Offline

Canada Canada

Posts: 1,793


Me with F1B - epic retrieval (flew 10km after DT)


WWW

Ignore
« Reply #10 on: July 17, 2009, 07:20:36 PM »

Ohhhh that makes all the difference Grin now it makes sense.

You can go lighter and easier to make: I will post a sketch later.
B
Logged

CEO,Chief designer, production line manager, factory worker, shipping and customer service manager, and janitor at Hummingbird Model Products.
Pages: [1]   Go Up
Print
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!