Jason (Blackshire on TRF) had brought up price comparisons between the 3 pack of 18mm A8-3 engines and the 4 pack of 13mm A10-3t engines.
Currently, a four pack of A10-t engines are $10.29 or $2.57 per flight (retail)
Currently, a three pack of A8-3 engines are $10.29 or $3.43 per flight (retail)
I did an earlier comparison using Jason's engine mount adapter HERE
As it turned out, even after sliding a 13mm "T" engine in his design mount, it was still lighter than a A8-3 engine.
For years I've slid 13mm engines into used 18mm casings.
Tonight I weighed them side by side.
The new A8-3 engine (pictured on the left) weighed in at .59 oz.
A new A10-3t engine slid into an expended B6-4 casing (on the right) weighed .54 oz!
Even with the added weight of the used casing, the A10 was still lighter than the more expensive A8-3.
For small fields (and my wallet), an A10-3t engine performance is close enough to the A8-3.
Always interesting to note both are measured to have far lower average thrust than the designation. And the A8 has slightly more total impulse. Probably not enough to matter.
ReplyDeleteHi Jeff,
ReplyDeleteYou are right!
After going to the www.thrustcurve.org website the A10 max thrust is 12.6n. The A8 max is 9.7n.
The A10 average thrust is 2.4n compared to the A8 average at 3.5n.
I'm just cheap!