Rails for Model - Mid-power Rockets

Rails for Model - Mid-power Rockets

Post by dornblase » Sat, 05 Aug 2000 04:00:00



I have been using rails for my high power rockets for a while.  I was
wondering who is using rail systems for model through mid-power launches?

David Dornblaser

 
 
 

Rails for Model - Mid-power Rockets

Post by Kurt Kesl » Sat, 05 Aug 2000 04:00:00



says...

Quote:
> I have been using rails for my high power rockets for a while.  I was
> wondering who is using rail systems for model through mid-power launches?

> David Dornblaser


Me.  Everything that is at least BT-60 gets rail guides.

--
Kurt Kesler

 
 
 

Rails for Model - Mid-power Rockets

Post by Chris Eilbec » Mon, 07 Aug 2000 04:00:00


Quote:

> I have been using rails for my high power rockets for a while.  I was
> wondering who is using rail systems for model through mid-power launches?

I've launched an Estes Alpha on a B6-4 from a BlackSky Rail.  Since I
bought a rail I use it for everything, no point in faffing about
changing between different rods and the rail.

Chris
--

MARS Flight Crew                                  http://www.mars.org.uk/
UKRA #1108 Level 1                                                   BSMR

 
 
 

Rails for Model - Mid-power Rockets

Post by GCGassaw » Tue, 08 Aug 2000 04:00:00


Quote:

>>>>I have been using rails for my high power rockets for a while.  I was

wondering who is using rail systems for model through mid-power launches?<<<<

C-rails were first used in the early days of model rocketry. Estes Industries
used to sell them but stopped around the late 1970's.

I've used C-rail launchers for some scale models (Space Shuttle, X-20
Dyna-Soar/Titan-II) and some sport models such as an R/C scaled up SkyDart.
Quite useful.  For rail lugs I've used "H" cross-section Plastruct beam.

- George Gassaway

 
 
 

Rails for Model - Mid-power Rockets

Post by Bob Kapl » Thu, 10 Aug 2000 04:00:00


Quote:

> I've used C-rail launchers for some scale models (Space Shuttle, X-20
> Dyna-Soar/Titan-II) and some sport models such as an R/C scaled up SkyDart.
> Quite useful.  For rail lugs I've used "H" cross-section Plastruct beam.

What do you use for the rail? I'm still searching for somehing suitable for
smaller rockets. Model rocket to LMR sized. Something we can standardize on
and is readilly available. One that I found but didn't like was metal
picture frame channels. The channel was too wide and not deep enough. ANy
better ideas?

        Bob Kaplow      NAR # 18L       TRA # "Ctrl-Alt-Del"

Kaplow Klips:   http://members.aol.com/myhprcato/KaplowKlips.html (baffle too!)
NIRA:           http://www.nira.chicago.il.us  NAR:    http://www.nar.org

 
 
 

Rails for Model - Mid-power Rockets

Post by dornblase » Thu, 10 Aug 2000 04:00:00


My original post assumed (although not stated) that the rail was the
standard BlackSky rail or a compatible rail.  Does sport need a smaller rail
for model rockets?
 
 
 

Rails for Model - Mid-power Rockets

Post by GCGassaw » Thu, 10 Aug 2000 04:00:00


Quote:

>>>What do you use for the rail? I'm still searching for somehing suitable for

smaller rockets. Model rocket to LMR sized. <<<

Being unable to find the old-fashioned Van curtain type of rail, I've made my
own over the years. Two flavors. One type makes use of "L" cross-section
extruded aluminum. Bolted to a suitable piece of "backbone" material that
provides the strength. The "L" pieces have each other with a suitable gap.
Last year I made one for the shuttle model, 6' long, disassembling into two 3'
pieces. The "backbone" for that one was 3/4" square aluminum, with 1/2" "L"
extrusions.

Another variation was to use two "U" cross-section pieces of aluminum extrusion
, laid on their sides, and contact-cemented to the backbone material. The rail
I used at NARAM this year was that type.

- George Gassaway

 
 
 

Rails for Model - Mid-power Rockets

Post by Foxey » Thu, 10 Aug 2000 04:00:00


Rail can be utilized from Sailboats, where they use it to adjust the
running gear etc.. YOu can even get stops which can be modified that
already fit these rails....comes in stainless or anodized
aluminum...... stops are a hard poly or plastic material or nylon.
also check the local s***yards, there is an awfull lot of extrusions
used in todays world. Many have cross sections well suited for a rail
system, one which comes to mind, is the rail used to install the RV
awnings into.its C shaped and about 5/16" in diam, others are the
mulions for aluminum windows, which are more squared and only about
1/4 or 3 /8 in thick and any where from 3/4 to 2+ inches wide...
I made mine from one upright portion of my old aluminum storm / screen
door....1" wide 6' long.....
 
 
 

Rails for Model - Mid-power Rockets

Post by Dean Rot » Fri, 11 Aug 2000 04:00:00


Quote:

> What do you use for the rail? I'm still searching for somehing suitable for
> smaller rockets. Model rocket to LMR sized. Something we can standardize on
> and is readilly available.

Have you looked at the 80/20 stuff? Four channels on each side of the 1"
square rail. My understanding is that the slots in the 1" square rail
are compatible with blacksky guides, or you can make your own guides
from
hardware store parts. $20.48 for a 6' rail from McMaster-Carr (or two
3' rails). $26.56 for a 8' length, or two 4' rails. Page 851 of the
catalog.

--
dean _ roth at yahoo dot com

 
 
 

Rails for Model - Mid-power Rockets

Post by Bob Kapl » Fri, 11 Aug 2000 04:00:00


Quote:


>> What do you use for the rail? I'm still searching for somehing suitable for
>> smaller rockets. Model rocket to LMR sized. Something we can standardize on
>> and is readilly available.

> Have you looked at the 80/20 stuff? Four channels on each side of the 1"

What is "80/20 stuff"?

Quote:
> square rail. My understanding is that the slots in the 1" square rail
> are compatible with blacksky guides, or you can make your own guides
> from
> hardware store parts. $20.48 for a 6' rail from McMaster-Carr (or two
> 3' rails). $26.56 for a 8' length, or two 4' rails. Page 851 of the
> catalog.

> --
> dean _ roth at yahoo dot com

--

        Bob Kaplow      NAR # 18L       TRA # "Ctrl-Alt-Del"

Kaplow Klips:   http://members.aol.com/myhprcato/KaplowKlips.html (baffle too!)
NIRA:           http://www.nira.chicago.il.us  NAR:    http://www.nar.org

 
 
 

Rails for Model - Mid-power Rockets

Post by Peter Kho » Sat, 12 Aug 2000 04:00:00


Quote:

>What is "80/20 stuff"?

http://www.8020.net/

I believe they are the OEM for McMaster-Carr rail stuff.
Call 80/20, they will give you your local contact/dealer which might have
some in stock.
fwiw, 80/20 charges a flat 21 cents per inch, and maximum continuous length
available is 242"
For quantities of ~10, shipping is by UPS, $15 to $20.

Peter Khor

 
 
 

Rails for Model - Mid-power Rockets

Post by Jim Z in V » Sat, 12 Aug 2000 04:00:00


Quote:

> http://www.8020.net/

> I believe they are the OEM for McMaster-Carr rail stuff.
> Call 80/20, they will give you your local contact/dealer which might have
> some in stock.
> fwiw, 80/20 charges a flat 21 cents per inch.....

    Is this the same stuff that's being sold as the "Extreme Rail"?
Similar cross section.  IIRC, it's being sold for $50 / 6' length.....that's
a pretty good markup!
--
Jim Z in Vermont

 
 
 

Rails for Model - Mid-power Rockets

Post by Peter Kho » Sat, 12 Aug 2000 04:00:00



Quote:


>> http://www.8020.net/

>    Is this the same stuff that's being sold as the "Extreme Rail"?
>Similar cross section.  IIRC, it's being sold for $50 / 6'

length.....that's

Walks like a duck, quacks like a duck ....

Okay, if you want the numbers:

* Ordering from McMaster, 1" rails range from 27.5 cents per inch to 31.6
cents per inch (available in 6', 8', and 10' only)

* Order from 80/20 it's 21 cents per inch, max 242"

* I called 80/20 to chat up a substantially "big" order to see the cost; for
6' rails, 10 pieces would cost $15 to $20 in shipping, 100 qty goes truck at
aprox $110 shipping charge.  ie, for a 100 qty 6' rail order, each rail cost
~$18.25 AFTER shipping and tax!  (okay, all going to one location for now)

* Want more?  You can actually design an entire launch pad using the
unistrut stuff (I have several designs currently); 80/20 will cut, kit AND
individually pack each setup ready for shipping in boxes, you supply the
assembly instructions.

Any takers now that the "secret's" out?  A reasonably beefy HPR pad with 6'
rail (or 8', or whatever) setup  should retail in the double digit range
with a modest profit margin to spare.  I've been sitting on this for quite a
while now ...

Peter Khor

 
 
 

Rails for Model - Mid-power Rockets

Post by Bob Kapl » Sat, 12 Aug 2000 04:00:00


Quote:


>> What do you use for the rail? I'm still searching for somehing suitable for
>> smaller rockets. Model rocket to LMR sized. Something we can standardize on
>> and is readilly available.

> Have you looked at the 80/20 stuff? Four channels on each side of the 1"
> square rail. My understanding is that the slots in the 1" square rail
> are compatible with blacksky guides, or you can make your own guides
> from
> hardware store parts. $20.48 for a 6' rail from McMaster-Carr (or two
> 3' rails). $26.56 for a 8' length, or two 4' rails. Page 851 of the
> catalog.

I've got a couple year old catalog on CDrom. Page 851 is nothing like rails.
Can you tell me the title at the top of the page or what to search for to
find this.

        Bob Kaplow      NAR # 18L       TRA # "Ctrl-Alt-Del"

Kaplow Klips:   http://members.aol.com/myhprcato/KaplowKlips.html (baffle too!)
NIRA:           http://www.nira.chicago.il.us  NAR:    http://www.nar.org

 
 
 

Rails for Model - Mid-power Rockets

Post by Dean Rot » Sat, 12 Aug 2000 04:00:00


Quote:

> I've got a couple year old catalog on CDrom. Page 851 is nothing like rails.
> Can you tell me the title at the top of the page or what to search for to
> find this.

I use the online catalog at http://www.mcmaster.com. Search for "851"
and set the search to "in our index" rather than "by keywords".
Scroll down to "Rails and End Caps". You need Acrobat.

--
dean _ roth at yahoo dot com