A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Post Curing Composites



 
 
Thread Tools Display Modes
  #11  
Old January 3rd 19, 05:05 PM posted to rec.aviation.soaring
[email protected]
external usenet poster
 
Posts: 21
Default Post Curing Composites

On Monday, December 31, 2018 at 2:45:51 PM UTC-6, wrote:
I am looking for some advise regarding "Post Curing of Epoxy Composites".

The sailplane composite repairs have been completed regarding my salvaged ASW-27. The tail boom has a new 3'long intermediate section that has been scarfed and glassed into position. The fuselage pod had some radial cracks and the seat pan had some fractures that were all scarfed and glassed. All of the composite repairs were done at room temperature using OEM materials and MGS epoxy.

What temperature is recommended and for what duration should I be using for post curing the repaired areas. Is there a temperature ramp up and ramp down time that I need to work with. I plan to build a foam insulation box around the repair areas and use a fan with a number of light bulbs to regulate the temperature.

Any advise is greatly appreciated,
Thanks,
Chris


Thanks for all of the assistance and advice. This is such a great group with experienced an knowledgeable contributors.

Much appreciated,
Chris
Ads
  #12  
Old January 4th 19, 03:02 PM posted to rec.aviation.soaring
[email protected]
external usenet poster
 
Posts: 1,792
Default Post Curing Composites

On Thursday, January 3, 2019 at 11:05:08 AM UTC-5, wrote:
On Monday, December 31, 2018 at 2:45:51 PM UTC-6, wrote:
I am looking for some advise regarding "Post Curing of Epoxy Composites".

The sailplane composite repairs have been completed regarding my salvaged ASW-27. The tail boom has a new 3'long intermediate section that has been scarfed and glassed into position. The fuselage pod had some radial cracks and the seat pan had some fractures that were all scarfed and glassed. All of the composite repairs were done at room temperature using OEM materials and MGS epoxy.

What temperature is recommended and for what duration should I be using for post curing the repaired areas. Is there a temperature ramp up and ramp down time that I need to work with. I plan to build a foam insulation box around the repair areas and use a fan with a number of light bulbs to regulate the temperature.

Any advise is greatly appreciated,
Thanks,
Chris


Thanks for all of the assistance and advice. This is such a great group with experienced an knowledgeable contributors.

Much appreciated,
Chris


My response assumed that you are using the MGS system the glider was built with and specified in the repair manual. That is where my info previously came from. This task is not rocket science and does not require much technology.
For the area of your tail boom repair a closed box of foam insulation or even a cardboard box will do fine. Make sure there is a good amount of space between the enclosure and the structure. For that size you can get enough heating with three 100 watt light bulbs if you put a few blankets around the box. Adjust the temperature by adding or removing a bit of insulation. You do need a reliable temperature measuring tool. I use a thermocouple on a meter but a simple calibrated oven thermometer pushed into the box will do in a pinch. Make sure it is remote from the heat source. I put the lights in the bottom at least 8 inches from the part, with a shield to avoid direct exposure.
It will take about 3 hours or so to come to equilibrium.
Gentle heating makes for an easily controlled system.
Curing for longer allows soak and does no harm.
UH
  #13  
Old January 7th 19, 04:56 PM posted to rec.aviation.soaring
[email protected]
external usenet poster
 
Posts: 21
Default Post Curing Composites

On Friday, January 4, 2019 at 8:02:31 AM UTC-6, wrote:
On Thursday, January 3, 2019 at 11:05:08 AM UTC-5, wrote:
On Monday, December 31, 2018 at 2:45:51 PM UTC-6, wrote:
I am looking for some advise regarding "Post Curing of Epoxy Composites".

The sailplane composite repairs have been completed regarding my salvaged ASW-27. The tail boom has a new 3'long intermediate section that has been scarfed and glassed into position. The fuselage pod had some radial cracks and the seat pan had some fractures that were all scarfed and glassed.. All of the composite repairs were done at room temperature using OEM materials and MGS epoxy.

What temperature is recommended and for what duration should I be using for post curing the repaired areas. Is there a temperature ramp up and ramp down time that I need to work with. I plan to build a foam insulation box around the repair areas and use a fan with a number of light bulbs to regulate the temperature.

Any advise is greatly appreciated,
Thanks,
Chris


Thanks for all of the assistance and advice. This is such a great group with experienced an knowledgeable contributors.

Much appreciated,
Chris


My response assumed that you are using the MGS system the glider was built with and specified in the repair manual. That is where my info previously came from. This task is not rocket science and does not require much technology.
For the area of your tail boom repair a closed box of foam insulation or even a cardboard box will do fine. Make sure there is a good amount of space between the enclosure and the structure. For that size you can get enough heating with three 100 watt light bulbs if you put a few blankets around the box. Adjust the temperature by adding or removing a bit of insulation. You do need a reliable temperature measuring tool. I use a thermocouple on a meter but a simple calibrated oven thermometer pushed into the box will do in a pinch. Make sure it is remote from the heat source. I put the lights in the bottom at least 8 inches from the part, with a shield to avoid direct exposure.
It will take about 3 hours or so to come to equilibrium.
Gentle heating makes for an easily controlled system.
Curing for longer allows soak and does no harm.
UH


Thanks Hank,

Your details really help out.

Much appreciated,
Chris
  #14  
Old January 8th 19, 10:43 PM posted to rec.aviation.soaring
Bret Hess
external usenet poster
 
Posts: 57
Default Post Curing Composites

Here's a temperature controller and probe for $30, and a version of the same for $15 if you can scrounge up your own cords:

https://smile.amazon.com/Inkbird-Ele...ure+controller

https://smile.amazon.com/gp/slredire...getName=sp_atf
  #15  
Old January 8th 19, 10:45 PM posted to rec.aviation.soaring
Bret Hess
external usenet poster
 
Posts: 57
Default Post Curing Composites

Jim Marske's advice is to limit the T rise to about 1 deg F per minute, so I interpret that as every 5 min or so raise the temperature by 5 degrees.
  #16  
Old January 12th 19, 12:19 PM posted to rec.aviation.soaring
Guy Palmer
external usenet poster
 
Posts: 1
Default Post Curing Composites

At 21:43 08 January 2019, Bret Hess wrote:
Here's a temperature controller and probe for $30, and a version

of the
sa=
me for $15 if you can scrounge up your own cords:

https://smile.amazon.com/Inkbird-Ele...c-Temperature-

Germination-Control=
ling/dp/B01486LZ50/ref=3Dsr_1_4?

ie=3DUTF8&qid=3D1546983554&sr=3D8-4&keyword=
s=3Dinkbird+temperature+controller

https://smile.amazon.com/gp/slredire...rect.html/ref=

3Dpa_sp_atf=
_aps_sr_pg1_2?

ie=3DUTF8&adId=3DA02927671UI46I5AKTV1Y&url=3Dhttps %3A%
2F%2Fsm=
ile.amazon.com%2FInkbird-All-Purpose-Temperature-Controller-

ITC-1000%2Fdp%2=
FB00OXPE8U6%2Fref%3Dsr_1_2_sspa%3Fie%3DUTF8%26qid %3

D1546983554%26sr%3D8-2-s=
pons%26keywords%3Dinkbird%2Btemperature%2Bcontrol ler%26

psc%3D1&qualifier=3D=
1546983553&id=3D6639836400413390&widgetName=3Dsp_ atf


This is the temperature controller I use for £7.42 inc postage! Works
very well:

AC 90V-250V MH1210W Digital Temperature Controller screen H2M6

can be found at:

https://www.ebay.co.uk/itm/AC-90V-250V-MH1210W-Digital-
Temperature-Controller-screen-H2M6/253816032413?
epid=1869137394&hash=item3b189d4c9d:g:HhsAAOSwRiNb dA4R

  #17  
Old January 12th 19, 09:54 PM posted to rec.aviation.soaring
Miroslaw Pitorak
external usenet poster
 
Posts: 2
Default Post Curing Composites

At 20:45 31 December 2018, wrote:
I am looking for some advise regarding "Post Curing of Epoxy

Composites".=
=20

The sailplane composite repairs have been completed regarding my salvaged
A=
SW-27. The tail boom has a new 3'long intermediate section that has been
s=
carfed and glassed into position. The fuselage pod had some radial

cracks
=
and the seat pan had some fractures that were all scarfed and glassed.

All
=
of the composite repairs were done at room temperature using OEM

materials
=
and MGS epoxy.=20

What temperature is recommended and for what duration should I be using
for=
post curing the repaired areas. Is there a temperature ramp up and ramp
do=
wn time that I need to work with. I plan to build a foam insulation box
ar=
ound the repair areas and use a fan with a number of light bulbs to
regulat=
e the temperature.=20

Any advise is greatly appreciated,
Thanks,
Chris



Just ask glider manufacturer - this is the best source of such information.
They should tell you what temperature and for how long have to be kept and
very likely heat up and cooling down procedure.
I can dig out such data for PW-6U (supplied by ZS Jezow when we did front
wheel repair) but they my not be relevant for your glider/epoxy used.

Regards,
Mirek P.

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Questions on UV curing polyester resins. Fred the Red Shirt Home Built 4 March 21st 10 05:07 AM
Questions on UV curing polyester resins. Fred the Red Shirt Home Built 0 March 20th 10 08:23 PM
heater control for curing oven [email protected] Home Built 27 October 1st 05 07:03 PM
composites propeller Philippe Home Built 2 August 4th 04 10:45 AM
composites vs. aluminum John C Home Built 23 May 7th 04 04:31 AM


All times are GMT +1. The time now is 10:44 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 AviationBanter.
The comments are property of their posters.