The Estes 1781 bulk pack contains 24 A8-3 model rocket engines with 30 starters, 24 starter plugs and about 75 squares of recovery wadding. The A8-3 is a single-stage 18 mm engine for rockets weighing up to 3 oz (85 g) including the engine. Its lower power keeps flights within sight and suits smaller launch fields, which makes this pack a good value for clubs, classrooms and frequent flyers.
Key Features
- 24 A8-3 engines in one bulk pack, a good value for groups and classrooms
- Includes 30 starters, 24 starter plugs and about 75 recovery wadding squares
- Single-stage engine with a 3-second ejection delay
- Lower-power engine for smaller fields where you want to see the whole flight
- Recommended for the Estes Alpha, Alpha III, Generic E2X, Wizard, Viking and other compatible kits
Specifications
| Engine | Estes A8-3 (single stage) |
|---|---|
| Diameter | 18 mm |
| Length | 2.8 in. (7 cm) |
| Total impulse | 2.50 N·s |
| Max thrust | 10.70 N (2.4 lb) |
| Thrust duration | 0.50 s |
| Time delay | 3 s |
| Max lift weight | 3.0 oz (85 g) |
| Engine weight | 0.55 oz (15.6 g) |
| Propellant weight | 0.14 oz (4.1 g) |
| SKU | 78TE1781 |
What's Included
- 24 Estes A8-3 engines
- 30 starters
- 24 starter plugs
- About 75 squares of recovery wadding
Ideal For
Model rocket clubs, schools, scout troops and anyone flying 18 mm rockets often.
Frequently Asked Questions
What does A8-3 mean?
"A" is the total-impulse class (1.26–2.50 N·s), "8" is the average thrust in newtons, and "3" is the delay in seconds between burnout and the ejection charge.
Will A8-3 engines fit my rocket?
They are 18 mm engines. Check your rocket's instructions or product page for the recommended engines before buying.
Is there a warranty?
Estes warrants the 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.