Author Topic: making a blade mold  (Read 2697 times)

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willib

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making a blade mold
« on: June 07, 2006, 03:08:43 AM »
i'm in the process of making a blade mold for the smaller set of blades.

these here


http://www.otherpower.com/images/scimages/2965/IM002098.JPG


i'm going to glass epoxy a  blade , then spray foam over the epoxy.

then peel off the blade , hopefully ..

then flip it over and do the other side.

when i'm done with this part i'll have two halves which i shall then have to fit together , a lot of unknowns at this point

wish me luck , back to work

« Last Edit: June 07, 2006, 03:08:43 AM by (unknown) »
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willib

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pics !
« Reply #1 on: June 06, 2006, 10:30:34 PM »
here i've cut the glass and taped the blade so the epoxy wont stick to it.

http://www.otherpower.com/images/scimages/2965/IMold1.JPG ~100k


a close up of the box tape on the blade

http://www.otherpower.com/images/scimages/2965/IMold2.JPG ~94k


ready for epoxy

http://www.otherpower.com/images/scimages/2965/IMold3.JPG ~86k


that box tape is a real blessing , because its so thin and it peels off of the foam fairly easily

« Last Edit: June 06, 2006, 10:30:34 PM by willib »
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Titantornado

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Re: pics !
« Reply #2 on: June 07, 2006, 04:55:06 AM »
You got that right about box tape.  I had no idea it would work so well.
« Last Edit: June 07, 2006, 04:55:06 AM by Titantornado »

willib

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Re: making a blade mold
« Reply #3 on: June 09, 2006, 11:16:58 PM »
i have been mulling this over for a couple of days , and i was laying the glass in place , but it wasnt sitting tightly enough against the airfoil so i decided to vacuum bag the process .

i'm using west system 105 epoxy and 205 hardener , i also got the pump dispensers the ones that measure out the right amount of stuff for the job.one pump on each measures correctly the ratio of hardener to resin.

i also got the west system publication 002-150 vacuum bagging techniques

i allready had the vacuum pump , a little hand operated one.

i've put a thermometer in the oven , and with the pilot light it maintains a steady temp of 90 F degrees.

so if all goes well by this time tomorrow i should have the first half done


this has nothing to do with the laminating job i just want to see what pops up on google ads

carbon fiber

carbon fibre

ultra capacitor

super capacitor

airfoil

« Last Edit: June 09, 2006, 11:16:58 PM by willib »
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willib

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windy as anything today
« Reply #4 on: June 10, 2006, 06:13:01 AM »
man o man is it windy today ,very strange for early june anyway






and it is so clear !

http://www.otherpower.com/images/scimages/2965/windy.JPG 59kb

« Last Edit: June 10, 2006, 06:13:01 AM by willib »
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willib

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Re: making a blade mold
« Reply #5 on: June 11, 2006, 12:11:38 AM »
progress is going slow

at the moment i'm trying to maintain a vacuum for the hours its going to take to cure i think i have it right this time , but if i had a bulb in the line it might triple the time it takes to repressurize
« Last Edit: June 11, 2006, 12:11:38 AM by willib »
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willib

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Re: making a blade mold
« Reply #6 on: June 11, 2006, 01:13:14 AM »
i think i've got it.

It went from 26.5 to 24.5 inches Hg Vac. in an hour, yay !!

now if the bag will hold a vacuum

and if the bag and glass and epoxy will hold a vacuum... ..
« Last Edit: June 11, 2006, 01:13:14 AM by willib »
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willib

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Re: making a blade mold
« Reply #7 on: June 11, 2006, 08:02:14 AM »
its been on for 8 hours , and only lost 4.5 inches of Hg vacuum , now to test the bag this part won't be so easy , but should be just as much fun !
« Last Edit: June 11, 2006, 08:02:14 AM by willib »
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willib

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Re: making a blade mold
« Reply #8 on: June 11, 2006, 11:34:26 AM »
ok this isnt working :(

new plan , i guess i'll have to use a constant vacuum

thing is the other day somone threw out a mini fridge with a really small compressor on it , when i went back it was gone !

damn
« Last Edit: June 11, 2006, 11:34:26 AM by willib »
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willib

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three lines comming from the compressor ???
« Reply #9 on: June 11, 2006, 02:27:23 PM »
back in buisness.went out to a garage sale and picked up a compressor a small one , question?

there are three lines comming from the compressor  , high pressure out , high pressure return and a third line? which is made of copper and is wider than than the other two? is this a low pressure return?
« Last Edit: June 11, 2006, 02:27:23 PM by willib »
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oztules

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Re: three lines comming from the compressor ???
« Reply #10 on: June 11, 2006, 06:20:06 PM »
Hi willib


 so how long is the piece of string?


I can't see what type of compressor you have there, but a few things to take into account on a simple system.


 It must have an inlet, signified usually by some form of air filter... or turn the pump and feel for the suction side.


It must have an output (the other one)


Once we have that we can have any number of gadgets hanging off the side. If the compressor has a reciever (holding tank of some type) it will have a copper pipe to connect it to the compressor output, and this may be the one your looking at.


It will have a sample of the output going to a shutoff switch to control the on/off switching. It will probably have some of the outlet directed to a pressure gauge, and more of the output will be paralled with an o/pressure valve. (generally on the reciever).


Then you may have a tap, a water trap, a pressure converter to stabilise the output over a wide range of tank pressures  .... as you can see you can keep on adding stuff so it's hard to guess at what you have, and the physical structure can vary as much as the imagination, all hoses connecting everything, or manifolds where no pipes are needed and it gets done like the controller in an auto transmission.... like a three dimensional circuit board.


...........so.... a picture..... (and a small one please.) I have not followed this thread well as I havent downloaded the large pics you have.


Well this may not have helped yet, but maybe soon......


.........oztules

« Last Edit: June 11, 2006, 06:20:06 PM by oztules »
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willib

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Re: three lines comming from the compressor ???
« Reply #11 on: June 11, 2006, 08:13:41 PM »
i give up

i just spent the last hour trying to resize some pix

the first half hour was spent trying to locate Infran view in the front page post on photo size abuse, i started at the bottom , and what do you know it was the tenth from the TOP....


The test pix i chose went from 640x480 @ 57kb to... 160x120 @ 56kb i dont understand


Does my pivoting blade gif take long to show up at your speed?

« Last Edit: June 11, 2006, 08:13:41 PM by willib »
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oztules

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Re: three lines comming from the compressor ???
« Reply #12 on: June 12, 2006, 02:47:19 AM »
pivoting blade is in the cache, so it's instant now


I use linux so dont know your progs on the windows machine.


A windows vresion of what I use is:


http://www.imagemagick.org/download/binaries/ImageMagick-6.2.8-0-Q16-windows-dll.exe


............oztules

« Last Edit: June 12, 2006, 02:47:19 AM by oztules »
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willib

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Re: three lines comming from the compressor ???
« Reply #13 on: June 12, 2006, 08:41:15 AM »
ok this one is only 22kb

its a pic of the smaller blades


http://www.otherpower.com/images/scimages/2965/IM002098a.JPG 22kb


upon further inspection it only has two lines ,and i know which one is the high pressure out ,its a Necchi M2040J , it came out of a small upright fridge

it was free so if it dosnt work , oh well

« Last Edit: June 12, 2006, 08:41:15 AM by willib »
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oztules

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Re: three lines comming from the compressor ???
« Reply #14 on: June 12, 2006, 08:45:21 AM »
pretty large chord here. What inspired this design?... good picture size for me.


Thanks for the glimpse of what you were talking about


...........oztules

« Last Edit: June 12, 2006, 08:45:21 AM by oztules »
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willib

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Re: three lines comming from the compressor ???
« Reply #15 on: June 12, 2006, 09:05:07 AM »
here is a side view

the root is about 13" , as for inspiration ,i would have to say the desire for a better blade , and all the people of this board.

i just took the blade calculator sort of verbatum , except i think it called for an 18" root , but i felt no need to make the chord that large

http://www.otherpower.com/images/scimages/2965/2103.jpg 15kb
« Last Edit: June 12, 2006, 09:05:07 AM by willib »
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oztules

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Re: three lines comming from the compressor ???
« Reply #16 on: June 12, 2006, 09:22:01 AM »
Most unusual. looks like a true air screw (or my idea of one anyhow). Your imaging has become very good, you may as well post the images straight into the story now... even my server can pull them in in 15 sec. very good clarity for 15k


thanks willib..........oztules

« Last Edit: June 12, 2006, 09:22:01 AM by oztules »
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willib

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Re: three lines comming from the compressor ???
« Reply #17 on: June 12, 2006, 09:38:46 AM »
is there anything on this board the you really want to see?

anything at all

just send me the link and i'll resize it.
« Last Edit: June 12, 2006, 09:38:46 AM by willib »
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willib

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Re: making a blade mold
« Reply #18 on: June 12, 2006, 12:59:54 PM »
BTW the compressor works beautifully ,i don't have a pressure gauge on hand , but the suction part , sucks 24" Hg vacuum ...!!

and its really quiet,

 i'll post some pixs later on

« Last Edit: June 12, 2006, 12:59:54 PM by willib »
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willib

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anybody know compressors ??
« Reply #19 on: June 13, 2006, 12:57:28 PM »
does anyone know how long the compressor will run without the oily gas replenisment?
« Last Edit: June 13, 2006, 12:57:28 PM by willib »
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willib

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Re: making a blade mold
« Reply #20 on: June 14, 2006, 08:54:49 AM »
the first compressor is a non functioning 20 lb papreweight :)which i threw out..

but i found two more :), both are from dehumidifiers unfortunatly , one is a 6.5A , the other is 8 amp, both are newer than the last one, and are sears Kenmore.


anyone who would pay to operate these things constantly ,would have to be out of their minds.

the refrigerant comes out of the compressor, and goes right into the evaporator, with no cooling whatsoever!!

whoever designed those is an idiot.!!

« Last Edit: June 14, 2006, 08:54:49 AM by willib »
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