Two simple steps transform a standard engine into a D size. Insert a standard engine into the adapter, and insert the adapter into a rocket. 3 adapters per pack. Reusable.
2317 – Engine Adapters Standard to D Description
Adapts D engine mounts to hold a standard engine.
NOTE: This motor adapter has been tested in products that use ESTES metal engine hooks. It may not work with other brands of engine hooks.
Rockets weighing up to 4 ounces that would normally fly on C11 or D12 engines can be flown on B and C engines.
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The Estes Super C is back! Reintroducing the Estes C5-3 engine – 50% increase in maximum thrust over a standard C engine and the punch you need to propel those heavier rockets off the pad. The Super C is a great choice for larger birds and for payload rockets, like competition egg-lofters, that need that extra push.