BlastoffDFW
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- Jan 16, 2018
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I thought I would share my latest project, a kitbash between:
The moment I saw this rocket - with it's BT60 tube - my inner child wanted to cram in an irrationally large engine. Lots of folks upgrade it to 24mm, but nobody but me seems crazy enough to try for 29MM.
Among my modifications:
So far, I completed the sanding of the engine retainer by attaching it to a papered balsa disc and spinning it in my rotary tool:
Before-and-After with the mount used to spin the retainer:
Original Estes 29mm retainer on BT60 tube:
Seamless fit of my modified retainer (Bonus: it's 2 grams lighter):
According to OpenRocket, this thing should weigh about 70 grams complete and could accelerate at 1967 m/s2 (about 200 g) to Mach 1.6 on a Cesaroni H410. Any bets on whether I win that drag race, or end up with a pile of balsa splinters? :lol:
- Estes 1/10th Scale Nike Smoke (007247) picked for $7.91 on clearance
- Estes Pro Series II Booster (009752) picked for $2.15 on clearance
The moment I saw this rocket - with it's BT60 tube - my inner child wanted to cram in an irrationally large engine. Lots of folks upgrade it to 24mm, but nobody but me seems crazy enough to try for 29MM.
Among my modifications:
- Sanding the ridges off the 29MM engine retainer so that it is the same diameter as the body tube
- Through-the-wall fins, rounded, papered with tissue & wood glue
- 100# Kevlar shock cord
So far, I completed the sanding of the engine retainer by attaching it to a papered balsa disc and spinning it in my rotary tool:
Before-and-After with the mount used to spin the retainer:
Original Estes 29mm retainer on BT60 tube:
Seamless fit of my modified retainer (Bonus: it's 2 grams lighter):
According to OpenRocket, this thing should weigh about 70 grams complete and could accelerate at 1967 m/s2 (about 200 g) to Mach 1.6 on a Cesaroni H410. Any bets on whether I win that drag race, or end up with a pile of balsa splinters? :lol: