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  #11  
Old 10-30-2020, 07:55 PM
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blackshire blackshire is offline
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Quote:
Originally Posted by BEC
So far, no. The Black Max Q-Jets are the ones that have been around since mid 2018. The White Lightining Q-Jets are not-yet-released, though they will be soon. I've flown some beta WL Q-Jets. They are NOT quiet. Rather the opposite.

I have no idea if there are long term plans to do a Blue Thunder or other Aerotech propellant variant of the Q-Jets. That's a question for Gary Rosenfield or Karl Baumann I think.
Thank you. It's purely academic to me now (except for assembling future gift packages), for health and flying field (lack of) reasons, but it still interests me. The one Blue Thunder motor I've fired (an Aerotech D18, in an Estes X-Flyer RTF) wasn't loud either, but that was because the rocket "teleported"; one instant it was on the pad, and the next--accompanied by a brief sizzling noise--it was just gone.
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  #12  
Old 10-30-2020, 10:30 PM
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BEC BEC is offline
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Blue Thunder motors that I have flown (D21 up to G80) are not loud either....I have often wondered about the name. White Lightning is MUCH louder.
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  #13  
Old 10-30-2020, 11:25 PM
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Originally Posted by BEC
Blue Thunder motors that I have flown (D21 up to G80) are not loud either....I have often wondered about the name. White Lightning is MUCH louder.
The Blue Thunder propellant may have been misnamed (my guess was that it was named after the fictional "super-helicopter" of the same name). "Blue Streak" might be a better name (that's also all that I ever saw when I launched the X-Flyer on the Aerotech motor--a very thin streak of blue smoke, high up in the sky), and:

I watched Neal Miller launch a large-scale V-2 model once or twice at Tamiami Park, using an Aerotech White Lightning motor (or motors). In addition to producing a scale-realistic--for a V-2 model--long white flame (the full-scale ones also had long exhaust flames, because of excess alcohol-water escaping from the holes drilled in their nozzle throats for film cooling), the White Lightning propellant burned with a surprisingly loud--but also scale-realistic--roar!
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  #14  
Old 10-31-2020, 12:28 AM
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Quote:
Originally Posted by blackshire
The Blue Thunder propellant may have been misnamed (my guess was that it was named after the fictional "super-helicopter" of the same name).


Nope.

You listen to a K1100 RMS motor ignite.

BOOM! Gone.
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  #15  
Old 10-31-2020, 02:14 AM
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Originally Posted by Initiator001
Nope.

You listen to a K1100 RMS motor ignite.

BOOM! Gone.
I'll take your word for it. My building's fire alarm, which is well above the pain threshold (even wearing shooter's hearing protection muffs doesn't filter it all out, but enough to avoid the pain), goes off often enough, including this afternoon--thanks to a few idiot residents who forget to turn on their stove hood fans when cooking--that I avoid unnecessary exposure to hearing-damaging noise.
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  #16  
Old 10-31-2020, 07:36 PM
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Quote:
Originally Posted by blackshire
I'll take your word for it.


The Blue Thunder propellant was developed at the time AeroTech was getting ready to enter the mass-market with a full product line.

While the White Lightning propellant and name had been developed and marketed a few years earlier with the E15/F25/G40 (Among others) motors, the high-thrust motors being incorporated into the mass-market release (E30/F50/G80) lacked much of a visual display.

While trying to come up with another color flame/smoke effect for the high-thrust motors it was bought up that the propellant used for the long-burn E6 motors emitted a very faint blue flame. From this basis an R&D project was launched to develop a more 'blue' exhaust flame propellant.

After some experimentation a propellant with a more visible blue flame was developed which was named "Blue Thunder" (You will have to ask Gary Rosenfield how the name came about). The blue flame is pretty much invisible in the smallest motors but can be seen in 'G' and larger motors.

Interesting thing about the BT propellant is that it requires additional pre-production steps before it can be cast.
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  #17  
Old 10-31-2020, 07:45 PM
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Quote:
Originally Posted by Initiator001
Nope.

You listen to a K1100 RMS motor ignite.

BOOM! Gone.



J800 is fairly similar, especially from about four feet away (malfunctioned pad relay at an adjacent pad at an LDRS one year).

Earl
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  #18  
Old 10-31-2020, 10:08 PM
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Originally Posted by Earl
J800 is fairly similar, especially from about four feet away (malfunctioned pad relay at an adjacent pad at an LDRS one year).

Earl


Ow!
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