The Estes 1672 Blast-Off Bulk Pack is an assortment of 24 of Estes' best-selling 18 mm model rocket engines: six each of the A8-3, B6-4, C6-3 and C6-5. It also includes 30 starters, 24 starter plugs and about 72 squares of recovery wadding. With four power levels in one box, it's easy to match the engine to the rocket, the field size and the altitude you want, which makes it a favorite of classrooms and rocket clubs.
Key Features
- 24 engines: 6 × A8-3, 6 × B6-4, 6 × C6-3 and 6 × C6-5
- Includes 30 starters, 24 starter plugs and about 72 squares of recovery wadding
- Four power levels to suit small fields, first flights and high-altitude launches
- All 18 mm single-stage engines
- Recommended for the AVG kits (Alpha, Viking, Generic E2X), Alpha III, Tandem-X (Crossfire ISX, Amazon) and other compatible rockets
Specifications
| Diameter / length | 18 mm / 2.8 in. (7 cm), all engines |
|---|---|
| A8-3 | 2.50 N·s impulse, 10.7 N max thrust, 3 s delay, 3.0 oz max lift |
| B6-4 | 5.00 N·s impulse, 12.1 N max thrust, 4 s delay, 4.0 oz max lift |
| C6-3 | 10.00 N·s impulse, 15.3 N max thrust, 3 s delay, 4.0 oz max lift |
| C6-5 | 10.00 N·s impulse, 15.3 N max thrust, 5 s delay, 4.0 oz max lift |
| SKU | 78TE1672 |
What's Included
- 24 Estes engines (6 each A8-3, B6-4, C6-3, C6-5)
- 30 starters
- 24 starter plugs
- About 72 squares of recovery wadding
Ideal For
Schools, scout troops, rocket clubs and families flying several 18 mm rockets.
Frequently Asked Questions
Which engine should I use first?
Start with the lowest-powered engine your rocket's instructions recommend (often the A8-3 or B6-4) for the first flight, then move up to C engines for higher flights.
What's the difference between the C6-3 and C6-5?
Both have the same thrust. The C6-3 deploys the recovery system 3 seconds after burnout, which suits heavier rockets. The C6-5 waits 5 seconds, which suits lighter rockets that coast higher.
Is there a warranty?
Estes warrants its engines against defects in materials or workmanship for one year from purchase. Keep the warranty information that comes in the package. Engines can't be returned by mail.
Ships via US Postal Service only. A physical mailbox or PO Box is required for delivery.