RC Slope Soaring in Hong Kong

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 Post subject: Making your own boom
PostPosted: Tue Jun 30, 2009 2:37 pm 

Joined: Mon Aug 02, 2004 10:14 am
Posts: 621
A very informative video
http://www.rcgroups.com/forums/showthre ... 398&page=2
8)


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 Post subject:
PostPosted: Wed Jul 01, 2009 7:45 am 
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Joined: Thu Feb 26, 2004 5:08 pm
Posts: 3021
Location: Hong Kong
原來錄影帶可以咁用 :D


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 Post subject:
PostPosted: Fri Jul 03, 2009 6:14 pm 
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Joined: Wed Mar 03, 2004 7:31 pm
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Just finished the fuselage today, will make the boom soon.

Image

Image

8) 8)


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 Post subject:
PostPosted: Fri Jul 03, 2009 6:28 pm 
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Location: Hong Kong
What is the purpose of the peanut :?:


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 Post subject:
PostPosted: Fri Jul 03, 2009 8:19 pm 
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Hi CM,

Quote:
What is the purpose of the peanut


Peanut is the best friend of BEER,

and BEER is one of my good friends.

:lol: :lol:


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 Post subject:
PostPosted: Fri Jul 03, 2009 10:08 pm 
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Joined: Thu Feb 26, 2004 3:51 pm
Posts: 3666
Location: Hong Kong
Ah Pong wrote:
Hi CM,

Quote:
What is the purpose of the peanut


Peanut is the best friend of BEER,

and BEER is one of my good friends.

:lol: :lol:


Oh! All these stuff are NO good to health,
take care, dear!


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 Post subject:
PostPosted: Fri Jul 03, 2009 10:24 pm 
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Joined: Wed Mar 03, 2004 7:31 pm
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8)

The canopy :

Image

8) 8)


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 Post subject:
PostPosted: Fri Jul 03, 2009 10:25 pm 
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Hi Stanley,

I am having my vacation.

Drinking beer and building models, what a day.

:wink: :wink:


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 Post subject:
PostPosted: Fri Jul 03, 2009 11:33 pm 
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Joined: Thu Feb 26, 2004 5:08 pm
Posts: 3021
Location: Hong Kong
Stanley wrote:
Ah Pong wrote:
Hi CM,

Quote:
What is the purpose of the peanut


Peanut is the best friend of BEER,

and BEER is one of my good friends.

:lol: :lol:


Oh! All these stuff are NO good to health,
take care, dear!


Stanley,

See what's on Pong-pong's T-shirt . .. .

Image


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 Post subject:
PostPosted: Thu Jul 16, 2009 10:30 pm 
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Joined: Wed Mar 03, 2004 7:31 pm
Posts: 1025
Hi folks,

Here is my vacumum bagged tail. Only 5.4 gram with live hinge.

Thanks for Ah MAK lending the vacumum pump to me.

Image

8) 8) [/url]


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 Post subject:
PostPosted: Sat Jul 18, 2009 3:52 pm 
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Joined: Thu Feb 26, 2004 5:08 pm
Posts: 3021
Location: Hong Kong
Oh very nice :)

Which type of foam is used for the core? Is it pink foam?

And I don't see reinforcement at the root. Is it only a test?


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 Post subject:
PostPosted: Sun Jul 19, 2009 11:27 am 
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:P

CM,

That was green foam.

Orginally, I intended to put carbon fabric for reinforcement, but run out of stock. (All my CF had gone to Stanley's broken planes, leaving only glass frbric in my workshop)

:roll: :roll:


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 Post subject:
PostPosted: Sun Jul 19, 2009 1:02 pm 
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Joined: Thu Feb 26, 2004 7:54 pm
Posts: 1660
Location: Tai Po, HK
Ah Pong wrote:
:P
leaving only glass frbric in my workshop)
:roll: :roll:


I have plenty of grass fiber in my garden.
You can have as much as you need :twisted:


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 Post subject:
PostPosted: Mon Jul 20, 2009 11:46 pm 
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Joined: Thu Feb 26, 2004 3:51 pm
Posts: 3666
Location: Hong Kong
Ah Pong wrote:
:P

CM,

That was green foam.

Orginally, I intended to put carbon fabric for reinforcement, but run out of stock. (All my CF had gone to Stanley's broken planes, leaving only glass frbric in my workshop)

:roll: :roll:


Oh! let me count:
One repair of bites for both left and right wings of Aris
One major repair for fuse and wing root of FR3
What else?
Just two! Although my 60" Shooting Star did require your massage once, it's nothing to do with CF.
It seems that I only used up less than a meter of CF from you! :twisted: :twisted:

Anyway, if you still have some CF left behind, my Ceres and Viking are waiting and happy to eat them up :lol: :lol: :lol:


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 Post subject:
PostPosted: Wed Jul 22, 2009 10:40 pm 
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Posts: 1025
Stanley wrote:

Quote:

Oh! let me count:
One repair of bites for both left and right wings of Aris
One major repair for fuse and wing root of FR3
What else? ............




I consider that was a very impolite reply.

Tell me if I am wrong.

Do you remember how many Aris you have?
And how many time the two Aris' have a broken neck ?

I am not going to count it, as it was only the corner of an ice-bxxxx ( forgotten how to spell due to drunkenness) but I could offer, whenwever my plane crashs and you could repair it at the same level of craftmanship, I would rather pay you a meter of 3K CF on each occasion! :evil: :evil:


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 Post subject:
PostPosted: Wed Jul 22, 2009 10:45 pm 
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Sorry Ah Yeung, as I have hi-jacked your thread. If you do not mind, could you amend the topic to ' Pong Pong building a 'DLG' ?


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 Post subject:
PostPosted: Wed Jul 22, 2009 11:21 pm 
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Joined: Wed Mar 03, 2004 7:31 pm
Posts: 1025
Dear fellows,

After the attempt for building a moldies on my own, I realize that, buying a moldies from european is still at a reasonable price, even the euro has gone up in recent months.

What we see on the final produce, is a thin layer of frabic, some balsa or rohecell, etc, but in fact, a lot of consumables had been discarded.

For example, a consider amount of solvant has to use after using the air-brush for cleaning. No matter how small the area you were repairing. And more importantly, at least 2 to 3 layers of paint must be used for a fine finishing.

Other consumables that you would never seen in the final product included:
Sanding papers, masking tapes, maylar, sanking tubes, wax, PVA (release agent), brushes for epoxy, broading paper, gloves, surgical masks (one mask and a pair of gloves each night of work), syringes, CA (AA glue), drill bits / sanding bits, polish agent, wraping clothes or tissue, fillers (micro ballon or fabric) etc,....


lastly, the most expensive investment is your TIME !!


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 Post subject:
PostPosted: Sat Nov 07, 2009 6:27 pm 
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Joined: Wed Mar 03, 2004 7:31 pm
Posts: 1025
Dear all,

I finally make the boom today after the finish of the fuse 5 months ago.

Step 1:

Make some tools for rolling the video tape. A tapered wooden pole, and a stand

Image

Modify a servo (make it turns like a motor) and put a switch on it. Also put a servo disc on the wooden pole.

Image

Make a video tape dispenser for even pressure applies on the pole.

Image

Step 2:

Wrapping the pole with video tape.

Image

Step 3:

Cut the uni-carbon into size I need.

Image

Step 4:

Wet out the frabic.

Image

Step 5:

Put several layers of frabic together and roll them on the pole (No picture this time, as to my messy hands).

Step 6:

Put the pole on the motor set, and repeat step 2. This makes the video tape wrapping the carbon frabic and squeesing all the air and excessive epoxy (no picture again. Messy hands)

Step 7:

Soak the excessive epoxy away every 5 minutes.

Image

Step 8:

Wait for the epoxy sets.

Image

Step 9:

Removing the outter layer of video tape. The boom seems OK.

Image

Will update later.

:P :P


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 Post subject:
PostPosted: Tue Dec 15, 2009 10:48 pm 
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Hi folks,

The first boom I made was a bit heavy as I have used 6oz Uni-CF.

Having gotten some 3oz uni-CF, and some 1K CF, and finally made a light boom (this is the 3rd attemp):

Fitted to the fuse:
Image

I think it looks better if the 1k CF is at the outter side :

Image

15.5g (boom only) is not too bad, right ?
How do you guys think ?


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 Post subject:
PostPosted: Tue Dec 15, 2009 11:45 pm 
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Joined: Thu Feb 26, 2004 7:54 pm
Posts: 1660
Location: Tai Po, HK
Well done :!:

Waiting to see your wings :o


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 Post subject:
PostPosted: Thu Jan 14, 2010 10:00 pm 
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Joined: Wed Mar 03, 2004 7:31 pm
Posts: 1025
Hi folks,

Do you guys have any broken guiter that you don't want ?

I need a little component from a guiter like the picture below for my hot-wire cutting blow:

Image


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 Post subject:
PostPosted: Sun Jan 31, 2010 7:07 pm 
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Joined: Wed Mar 03, 2004 7:31 pm
Posts: 1025
Hi folks,

My vacaum bump is done and working fine:

Image

8) 8)


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 Post subject:
PostPosted: Mon Feb 01, 2010 10:56 am 
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Joined: Thu Feb 26, 2004 7:54 pm
Posts: 1660
Location: Tai Po, HK
Ah Pong wrote:
Hi folks,

My vacaum bump is done and working fine:
8) 8)


Very nice and tidy :D

but where is the vacaum reservoir ?


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