RE: DC-9 Airliner Construction  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> Composites Fabrication And Repair >> RE: DC-9 Airliner Construction
Page: <<   < prev  1 [2]

Login
Message << Older Topic   Newer Topic >>
RE: DC-9 Airliner Construction - 12/6/2004 10:30:09 PM   
DocYates



Posts: 2631
Joined: 1/2/2002
From: Killen, AL, USA
Status: offline 		Awesome job...keep em' coming.
Tommy
What is HydroCal (sp), and where does one buy this type of stuff?

_____________________________

"Those who beat their swords into plowshares, will plow for those who did not".

(in reply to ryancbr)
       Post #: 26

RE: DC-9 Airliner Construction - 12/7/2004 3:16:23 AM   
ryancbr



Posts: 75
Joined: 10/3/2003
From: San Diego, CA, USA
Status: offline 		Hydrocal is similar to plaster paris, but it dries more solid and can be sanded to a finer surface. Here is a link of where hydrocal is available locally: http://www.gypsumsolutions.com/distributor/BrandDistributors.asp?brand=30

I found it here in San Diego at a supply store for $38 for a 100 pound bag.

(in reply to DocYates)
       Post #: 27

RE: DC-9 Airliner Construction - 12/7/2004 1:25:16 PM   
DocYates



Posts: 2631
Joined: 1/2/2002
From: Killen, AL, USA
Status: offline 		Thanks Ryan,
Very interesting concept, and your work looks great. Where did you find the three views with the formers? I manage to find the three views I need, but never any that show the formers, or at least the templates for them.
TOmmy

_____________________________

"Those who beat their swords into plowshares, will plow for those who did not".

(in reply to ryancbr)
       Post #: 28

RE: DC-9 Airliner Construction - 12/7/2004 8:23:32 PM   
ryancbr



Posts: 75
Joined: 10/3/2003
From: San Diego, CA, USA
Status: offline 		If you look head on at a DC-9 3 view, it is just a round shape. So, I just used a circle drawer to draw the circle, cut it out and then cut it out of formica as a template.

The profile is actually from an RCM design, but my next project will be a 757 that is coming from eduardospage. I just saved that picture, edited it as a .bmp image, then went to page setup and asked it to print over 3 pages. The lines that are 45 degrees from the plane are there to line everything up, then I just tape them together.

Attachments
Click to see fullsize image.
Click for fullsize

(in reply to DocYates)
       Post #: 29

RE: DC-9 Airliner Construction - 12/7/2004 9:04:39 PM   
cwrr5



Posts: 2135
Joined: 5/19/2004
From: Tucson, AZ, USA
Status: offline 		Looking great! Got any future plans for a 737?

(in reply to ryancbr)
       Post #: 30

RE: DC-9 Airliner Construction - 12/7/2004 10:12:30 PM   
ryancbr



Posts: 75
Joined: 10/3/2003
From: San Diego, CA, USA
Status: offline 		Yeah, I thought it would be neat to have a bunch of the big airliners. Anyone out there have a 3 view of the new airbus?

I also want to try and make a C-5A Galaxy and a C-130.

(in reply to cwrr5)
       Post #: 31

RE: DC-9 Airliner Construction - 12/8/2004 12:27:00 AM   
MTT



Posts: 558
Joined: 1/18/2002
From: West Chester, OH, USA
Status: offline
quote:

If you look head on at a DC-9 3 view, it is just a round shape. So, I just used a circle drawer to draw the circle, cut it out and then cut it out of formica as a template.


Sorry to rain on your parade, but the DC-9's cross-section is not "just a circle", although it may look like that in the 3-views.
The DC-9 used basically the same "double-bubble" cross-section as the DC-8, only that it was scaled down a little, the DC-9 seats 5 abreast, the DC-8 seats 6 abreast.
The Boeing 707/720, 727 and 737 all used the same circular cross-section, with 6 abreast seating, thats why the 737 looks so fat and stubby next to a DC-9.

But even so, a great project !

< Message edited by MTT -- 12/8/2004 12:28:18 AM >


_____________________________

Michael
I care about rising air !

My HP

(in reply to ryancbr)
       Post #: 32

RE: DC-9 Airliner Construction - 12/8/2004 1:37:15 AM   
ryancbr



Posts: 75
Joined: 10/3/2003
From: San Diego, CA, USA
Status: offline 		Close enough to a circle for me:

Attachments
Click to see fullsize image.
Click for fullsize

(in reply to MTT)
       Post #: 33

RE: DC-9 Airliner Construction - 12/8/2004 1:58:34 AM   
av8r4aa



Posts: 411
Joined: 3/6/2002
From: Coppell, TX, USA
Status: offline 		Having several thousand hours in the MD 80/DC-9 I can attest that it is
a double bubble design.
If I were to make a model of one I would make it round.
It is round in the cockpit area. then tapers to a double bubble design.
As for your project.
KEEP UP THE AWSOME WORK!!

_____________________________

Some guys Golf...........I RC

(in reply to ryancbr)
       Post #: 34

RE: DC-9 Airliner Construction - 12/10/2004 9:45:05 PM   
ryancbr



Posts: 75
Joined: 10/3/2003
From: San Diego, CA, USA
Status: offline 		Mixing cups arrived! I will start fiberglassing today. For this plane which is about 3 1/2 feet long, and is intended to be a slope soarer, what weight of fabric and how many layers do you think I should use?

I have 3/4 oz, 2 oz, 6 oz, 7.5 oz and 9 oz fabric to use. The AT-6 in a previous post turned out pretty well with 3/4 oz over bias cut 6 oz, but that was only a speed 400 plane.

(in reply to av8r4aa)
       Post #: 35

RE: DC-9 Airliner Construction - 12/10/2004 10:08:02 PM   
DocYates



Posts: 2631
Joined: 1/2/2002
From: Killen, AL, USA
Status: offline 		Keep it light, go with the 3/4 oz.
Tommy

_____________________________

"Those who beat their swords into plowshares, will plow for those who did not".

(in reply to ryancbr)
       Post #: 36

RE: DC-9 Airliner Construction - 12/10/2004 10:59:38 PM   
ryancbr



Posts: 75
Joined: 10/3/2003
From: San Diego, CA, USA
Status: offline 		how many layers?

(in reply to DocYates)
       Post #: 37

RE: DC-9 Airliner Construction - 12/11/2004 2:11:40 PM   
DocYates



Posts: 2631
Joined: 1/2/2002
From: Killen, AL, USA
Status: offline 		SInce it is a slope soarer and will probably be belly landed, I would go with one on the top and two on the bottom. Others with more experience here might want to chime in.
TOmmy

_____________________________

"Those who beat their swords into plowshares, will plow for those who did not".

(in reply to ryancbr)
       Post #: 38

RE: DC-9 Airliner Construction - 12/11/2004 6:29:17 PM   
Juice



Posts: 852
Joined: 2/12/2002
From: Richmond Hill, ON, CANADA
Status: offline 		This is a very interesting thread. It looks like a good method to make dozen (give or take) quick and cheap parts.

One question... In Post #: 22 and Post #: 23 you mention something called a "hot box". What is a hot box? Sounds like an oven. Can you give us more details about this? Maybe some pictures? Is is that tin foil enclosure you show in Post #: 25?

Keep up the great work, and thanks for sharing.

Juice

(in reply to cwrr5)
       Post #: 39

RE: DC-9 Airliner Construction - 12/11/2004 8:57:32 PM   
ryancbr



Posts: 75
Joined: 10/3/2003
From: San Diego, CA, USA
Status: offline 		Details on the hot box at: http://www.rcuniverse.com/forum/help_composite_oven/m_2356402/tm.htm

(in reply to Juice)
       Post #: 40

RE: DC-9 Airliner Construction - 12/18/2004 10:50:40 PM   
ryancbr



Posts: 75
Joined: 10/3/2003
From: San Diego, CA, USA
Status: offline 		I have layed up 2 fuselages. The first one I did with NHP epoxy, 3/4oz on the outside and 6 oz on the inside. It came out nice and strong, but a little heavy. It will make a good plane in heavier winds. The second I layed up with a single layer of 6 oz cloth with west systems epoxy. The second fuselage came out nice and light at 5 oz. Ill be experimenting with formers and will start making the wing here pretty soon.

Here is a picture of the 2 fuselages Ive laid up so far:

Attachments
Click to see fullsize image.
Click for fullsize

(in reply to ryancbr)