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Old Jan 31, 2011, 03:41 PM
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London, UK
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Estes Optima

Anyone built/own/flown one of these and give me a recommendation or otherwise. thanks

4 feet tall
requires D engines
390 feet
recovery parachute
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Old Feb 01, 2011, 09:53 PM
SPOOOOOOON!
Joined Oct 2006
338 Posts
Very nice rocket. I always liked the looks. Have a Shadow (same design, different name) in the build pile.

Very similar to the Super Big Bertha in performance, a big slow rocket that can fly on smaller (football pitch) sized fields.

kj
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Old Feb 02, 2011, 07:06 PM
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Thanks. He is a good looking fella.
Is the stock shock-cord adequate on the Optima (original)?
What rod do you need to launch this - standard OK or maxi-rod.
Can you use anything else besides a maxi-rod.
I would expect this guy eats wadding like hell... any alternatives?
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Old Feb 03, 2011, 04:58 AM
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What particular Estes D motor is recommended for the "easiest" launch for this rocket? Assume winds of 5 mph - 8 mph and launching on a mid-large size field. Need to place an order from my local hobby shop, so they need the exact D type

My option available (for local pick-up/no shipping)
D12-5
D12-7
D12-3
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Last edited by arukum17; Feb 03, 2011 at 05:18 AM.
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Old Feb 03, 2011, 01:33 PM
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Western New York
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Quote:
Originally Posted by arukum17 View Post
What particular Estes D motor is recommended for the "easiest" launch for this rocket? Assume winds of 5 mph - 8 mph and launching on a mid-large size field. Need to place an order from my local hobby shop, so they need the exact D type

My option available (for local pick-up/no shipping)
D12-5
D12-7
D12-3
The recommended motors for the Optima are D12-3 and D12-5. The only difference is the time delay before ejection.
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Old Feb 03, 2011, 11:15 PM
SPOOOOOOON!
Joined Oct 2006
338 Posts
Quote:
Originally Posted by arukum17 View Post
What particular Estes D motor is recommended for the "easiest" launch for this rocket? Assume winds of 5 mph - 8 mph and launching on a mid-large size field. Need to place an order from my local hobby shop, so they need the exact D type

My option available (for local pick-up/no shipping)
D12-5
D12-7
D12-3
D12-3 will probably give you ejection right at apogee. Use the -5 on calm days for extra altitude.
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Old Feb 10, 2011, 10:23 PM
Arrowhead
Joined Dec 2010
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D12-3 is the only safe choice. I had an Optima years ago... first flight, using a D12-5, deployed the chute after creating a hole in the ground. And I've never built heavy.

An Aerotech E15-4 or E30-4 makes for a great flight.
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Old Feb 25, 2011, 05:42 AM
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The rocket has a wide outer tube (around 2.5 inches dia) and a narrower inner "stuffer" tube (around 0.75 inches dia from memory)... I assume both the wadding AND the parachute are stuffed into the narrow stuffer tube.

For maximum safety of parachute deployment.... do you stuff the wadding deep or keep it spread out?

If flying in a large (for London) field with around 2x-4x the size of a football field of non-tree area... and on D12-3 or D12-5s would you need to cut a hole into the 24 inch parachute to avoid drift away (5-8mph wind)... if so what (ballpark) size of hole would be sufficient?
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Old Mar 13, 2011, 03:21 PM
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Question for Estes Shadow or Estes Optima flyers:

Does the parachute go in the upper wide tube (2.5 inch diameter), or do you have to push the parachute into the stuffer tube after the wadding?

thanks
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Old Mar 23, 2011, 12:35 PM
Arrowhead
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The chute goes in the wide section. You can stuff a bit of wadding down the stuffer tube, then lay a couple of sheets flat over the centering ring/bulkhead, and put the chute on top of that.

I would not put the wadding in too deep, in case it's in a bit tight.

The purpose of the stuffer tube is to reduce the volume of airframe that the ejection charge has to pressurize. Too much space, and it's possible the ejection charge won't have enough "oomph" to deploy the parachute. The other advantage is it cuts down on the amount of wadding needed.
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Old Aug 02, 2011, 10:35 AM
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If flying with a D12-3 and in a medium sized field (suitable for regular RC) would you put a hole through the parachute to prevent a float away? Or is the Optima heavy enough to come down well within the field space.

Asking because I lost an beloved Alpha III on the same field while flying a B engine. That was much tinier, and I regret not putting a hole in the parachute.

If you do recommend a hole, roughly what size diameter?
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Old Oct 02, 2011, 10:12 AM
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Launch video!

Estes Optima Rocket Launch (1 min 20 sec)
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Old Oct 02, 2011, 10:26 AM
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A bit of cracking between the fin and the body on one of the fins . Fin still holds well but want to give it a bit of TLC... My choices are a coat of epoxy to hardne the area / a strip of glass fibre tape / a strip of gorilla tape. Any suggestions?
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Old Oct 02, 2011, 01:32 PM
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Finally got around to making a launch compilation

Estes Optima Rocket Launch & Recovery (1 min 21 sec)
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