Eric
Well-Known Member
So I'm going to put this build thread in MPR because that's what it was designed for. But it will have a HPR aspect to it.
So I order one of Mach 1 Rocketry's new fiberglass BT-60 kits... And they are pretty sweet. I am basing my comparisons off of my Madcow/RW Rapton and Go-Devil 38.
This fiberglass tubing is lite... It is advertised at .5mm. And you can see right through it.
For a $45ish kit it is very complete.
The BT-60 kits do not come packs as meticulously as the bigger kits I have ordered from Mach 1. They come standard in a bag shipped inside of a box. But these parts are light and they arrived with no damage. And that seems to be pretty standard with other kids of this size.
I believe you can get these kits with a 24mm motor mount. But I opted for the 29 mm. And I also received the option that moves this into a much more exciting rocket. The BT-60 coupler tube is the same diameter as a 38 mm motor mount. So the option to go with 38 mm includes using a stuffer tube that covers the fin slots.
After a day of hard contemplation I decided to go with 38 mm. Only because my end plan is to fly it on an I59 long burn.
So after washing all the components and wiping down with acetone. All the epoxy locations received a rough scuffing. Then the motor stuffer tube was epoxied into place.
I now have only .5mm of fin tab engagement. So the fins went to the band saw and received a trim. After a light evening out on the Belt Sander everything lined up nice.
So I order one of Mach 1 Rocketry's new fiberglass BT-60 kits... And they are pretty sweet. I am basing my comparisons off of my Madcow/RW Rapton and Go-Devil 38.
This fiberglass tubing is lite... It is advertised at .5mm. And you can see right through it.
For a $45ish kit it is very complete.
The BT-60 kits do not come packs as meticulously as the bigger kits I have ordered from Mach 1. They come standard in a bag shipped inside of a box. But these parts are light and they arrived with no damage. And that seems to be pretty standard with other kids of this size.
I believe you can get these kits with a 24mm motor mount. But I opted for the 29 mm. And I also received the option that moves this into a much more exciting rocket. The BT-60 coupler tube is the same diameter as a 38 mm motor mount. So the option to go with 38 mm includes using a stuffer tube that covers the fin slots.
After a day of hard contemplation I decided to go with 38 mm. Only because my end plan is to fly it on an I59 long burn.
So after washing all the components and wiping down with acetone. All the epoxy locations received a rough scuffing. Then the motor stuffer tube was epoxied into place.
I now have only .5mm of fin tab engagement. So the fins went to the band saw and received a trim. After a light evening out on the Belt Sander everything lined up nice.