My first hpr build

[Bowhunter]

Hey Larry hows the build coming?

 

[Larry Terneus]

Not done much
had to order some 30 min epoxy, got here last night.
Wainting on a MRS from Giant Leap.
Have learned two things.
1. sand all areas where the QT has been factory cut to remove the burs
2. be very gentle with the phnolic tubing the stuff is brittle as he....

 

[ben]

Originally posted by Larry Terneus

2. be very gentle with the phnolic tubing the stuff is brittle as he....

HEH I found that out the hard way. I went through 4 couplers on a build. I ended up getting one stuck in a tube on dry fit and I had to break it out. another one my syster knoked on the floor and my sister stepped on it. I them got it right and I bought an extra just incase

thanx, Ben

 

[Larry Terneus]

Hello Warren
I did get my NAR # today.
I am now NAR# 86707.
So I am $62 closer to being able to fly.
Best
L.T.

 

[rocket72175]

Originally posted by TWRackers
One fluid ounce of mixed foam liquid should translate into about one ounce (mass) of expanded foam, but occupy the equivalent volume of about 25 fluid ounces (expansion ratio of 25:1) or over 1½ pints. I could've easily used over 1 ounce (mass) of epoxy doing it the other way.

Right on, Thomas. Conservation of mass is a wonderful thing. For a relatively small diameter rocket, the foam weighs less than internal epoxy fillets.

I hate working with fins, fillets (esp. internal ones), and epoxy. That's why my rockets usually have only 3 fins and foam!

 

[Bowhunter]

Originally posted by Larry Terneus
Hello Warren
I did get my NAR # today.
I am now NAR# 86707.
So I am $62 closer to being able to fly.
Best
L.T.

Great before ya know it. It will have Cert LVL1 on it