Quantcast

Mid-Power Rail length

The Rocketry Forum

Help Support The Rocketry Forum:

Bowhunter

Well-Known Member
Joined
Jan 19, 2009
Messages
2,030
Reaction score
0
What is the Ideal lenght for a mid power rail?
 

Johnnie

Well-Known Member
Joined
Dec 31, 2002
Messages
4,289
Reaction score
0
4' feet is good, and a most common size with Blacksky rails. 6' feet is better, and is readily available from McMaster-Carr, and is also more versatile for use in that it will cross to HPR useage as well.

$.02
 

lotekrockets

New Member
Joined
Nov 3, 2004
Messages
4
Reaction score
0
I'd lean toward six to eight feet. More is better, the only down side to a longer rail/rod is a little extra drag(negligible) lowering your peak altitude. Well, that and you have to find a way to transport the thing, an eight foot rail is a little hard to manage in some cars. I just bought an eight foot rail from McMaster Carr for $25, an adapter for it to 1/2 rod so it can go in a pad we use for rods as well as rails (another $20 plus $4 shipping from www.railbuttons.com)

I'm not working for or affiliated with either business. That said, I'm very happy with railbuttons.com's service, I ordered it and got it two days later as promised. Matt has always done me right.

John Gordon
 

rstaff3

Oddroc-eteer
Joined
Jan 18, 2009
Messages
11,716
Reaction score
8
My 2cents. I have been using the 2 piece 4' BSR for a long time and it has been fine for MPR and shorter HPR. I got it before the existance and compatibility of the 80/20 rails was widely known. If you are going to buy the 80/20, you should get as long as you can handle/transport 6-10'.

Ditto on Matt's service and the cost-benefit of his products!
 

jetra2

Well-Known Member
Joined
Jan 25, 2009
Messages
2,792
Reaction score
2
Is there a way a 8' rail can be cut into two 4' rails? Mainly because 4' would be PERFECT for LPR and some MPR, then when you wanted extra stability, you'd use some sort of metal rod in the center hole, or brackets on the outside, to make it back into a 8' rail. You could also transport it in two sections! I imagine this would take a lot of ACCURATE drilling/tapping, but I think it would be worth it!

Jason
 

Hospital_Rocket

Well-Known Member
Joined
Dec 25, 2003
Messages
3,990
Reaction score
1
If you go with 80/20 they sell splices that make an almost seamless joint.

I have my portable rail in 2' sections. Everything fits nicely into a gym bag.

A
 

Johnnie

Well-Known Member
Joined
Dec 31, 2002
Messages
4,289
Reaction score
0
Along the lines of what jetra is saying, I bought (2) 6' foot sections of extruded rail from McMaster-Carr, and cut one down to 4' foot with a band saw. The 2' footer that was cut off, is used as the brace to connect the two sections together. I can have a 4'; 6'; or 10' full feet of rail. I also used a small piece of rod that slips in the center hole of the rail halves.

...not to mention, it was just as cheap to ship (2) 6' pieces as would have been to ship (1).

When I purchase my 1515 rail, I will bite the bullet and have a full 10' footer shipped if I can muster up a group buy here with our club.
 
Top