Aerotech vs estes D. Which one is stronger? Im confussed. Or are the about the same?

It's not quite that simple. Take a look at the numbers and thrust time curves on these pages.

data for D10


data for D12

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Bill Spadafora
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If you look at the overall newton seconds, (the definition of power here) the Estes model has only 17N/S, while the Aerotech has 20N/S. Also with taking in the weight differences and size differences, it looks like the Aerotech would have the advantage over the Estes engine IMO.

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She said, "Don't make me release the flying monkeys!"

Too late, I'm here......

The Aerotech D15 is a better comparison.

Aerotech D15 Data

Pound for pound I like the D12 over anything else in the D range. It's just a great motor.

bu it could be possible that the smaller mass of the d-10 and the fact it is also an 18mm engine could be an advantage for competitive uses. but then if the rocket can stand the thrust curve of the D21-4, it could prove to be the best of them all. but its all JIMO

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She said, "Don't make me release the flying monkeys!"

Too late, I'm here......

Depends on the weight and how fast she needs to get moving too... lighter rocket, go for the longer duration burn for higher performance-- heavier rocket, go for the higher peak thrust motor to get it up to speed quickly before you run out of launch rod... OL JR

That said, I wish that the BP D was a FULL 20 n/s D motor, instead of 17... stretch the burn another .3 seconds would be sweet... but they probably can't fit that much powder into the casing... OL JR

PS. Here's an idea, dump the 70 mm casing and make ALL of em 95 mm like the E BP motors.... OL JR

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well, of course then you'd make hundreds of thousands of existing rockets obsolete, and you'd trade some of that extra 3ns to carry an extra inch of casing.

what about also suggesting that they drop the 18mm C6, and just go with the 24mm C11 (in a 95mm long casing)?

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Roy
nar12605

Bite your tongue! I'd rather have a full line of C6 and C11's than a full line of B4 and B6's.

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Here is a motor comparison.

Greg

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If the rocket was 330 grams or less, I would go with the Estes D12. If it were over that, then the D10 gets to be a better choice. The D10 comes up to full thrust almost immediately and keeps on pushing. The D12 would give your rocket a greater opportunity to weather cock if it was on the heavy side.

Greg

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