Hybrids 2021

[Bruce]

... I may dust off the 29 mm and put them back on the test stand that is if enough flyers are interested in 29 mm hybrid motors....
hybrid R&D has not stopped....
The only limitation is your imagination....

I like how you think Tom!

Yes, I for one would be interested in buying a 29mm hybrid setup if certified reloads were available.

Keep up the good work!

 

[0011001100]

29mm Hybrid would be pretty cool. I've wanted to try hybrids but the larger motors have a bit of an initial cost and 29mm would be perfect for me as that is my most flown size.

 

[Bruce]

What was the smallest hybrid motor?

I thought SkyRipper had 29mm hybrids? Anyone fly those?

Did they make a 24mm hybrid? Now there's a challenge!

 

[ContrailRockets]

What was the smallest hybrid motor?

I thought SkyRipper had 29mm hybrids? Anyone fly those?

Did they make a 24mm hybrid? Now there's a challenge!

What Electronics would you use for 24 mm hybrid powered rocket?

 

[Bruce]

Several dual deploy altimeters will fit in a 24mm tube. I've had good luck with the Altus Metrum Easy Mini and the Eggtimer Quark. I'm sure there are others...

 

[AeroTech]

29mm experimental AeroTech hybrid. My son Brian flew this in a minimum diameter rocket. We also were working on 38mm hybrids and nearly put them into production.

 

[crossfire]

I would like a 38mm hybrid myself. Will this be offered as a AT product? Is this prefilled type hybrid?

 

[ContrailRockets]

Thrust curve.org shows only 3 certified hybrid 29 mm motors all from RatWorks

No 24 mm certified hybrid motors listed.

 

[AeroTech]

I would like a 38mm hybrid myself. Will this be offered as a AT product? Is this prefilled type hybrid?

They were all prefilled. This is from 20+ years ago. We have no plans to reintroduce the hybrid line at this time.

 

[Bruce]

29mm experimental AeroTech hybrid. My son Brian flew this in a minimum diameter rocket.
View attachment 461363

Please give us a few more details? What was the average thrust and total impulse of the 29mm hybrid motor? And what was the propellant weight?

Any idea how fast / high the rocket went?

Looks like a very cool project!

 

[ContrailRockets]

What was the smallest hybrid motor?

I thought SkyRipper had 29mm hybrids? Anyone fly those?

Did they make a 24mm hybrid? Now there's a challenge!

The real challenge is taking the innovations in the CNVA internal vent 54 mm motor and Miniaturizing it to fit in a 24 mm motor.
I love a challenge and as I have been working on internal vented motors since 2002 and have operational 54 and 38 internal vented motors. Why not expand development of the hybrid pad filled internal vented motors to include the 29 and 24 mm motors.

Some may say that’s impossible.

The Limitation is Imagination
Tom Sanders
Contrail Rockets

.................... 38 mm... 29 mm... 24 mm...

 

[Bruce]

You are absolutely the right person for the job Tom!

If anyone can make an efficient 24mm hybrid motor, it's you

I look forward to seeing the fruits of your labor!

 

[crossfire]

They were all prefilled. This is from 20+ years ago. We have no plans to reintroduce the hybrid line at this time.

Yes that I knew that but the pictures above look nothing like you had.

 

[AeroTech]

Yes that I knew that but the pictures above look nothing like you had.

True, I don’t think we ever publicized it. It was in my personal collection.

 

[crossfire]

True, I don’t think we ever publicized it. It was in my personal collection.

Did it work well. Looks a lot different than pyro valve

 

[dhbarr]

True, I don’t think we ever publicized it. It was in my personal collection.

Thanks.

 

[AeroTech]

Did it work well. Looks a lot different than pyro valve

It did. It flew an estimated 5-6,000 feet and was recovered intact. It used the same pyrovalve setup as the larger hybrids. It was actually a turbo hybrid as it used under-oxidized propellant as the fuel grain.

 

[crossfire]

It did. It flew an estimated 5-6,000 feet and was recovered intact. It used the same pyrovalve setup as the larger hybrids. It was actually a turbo hybrid as it used under-oxidized propellant as the fuel grain.

The hardwear look so much differant than I remember. Forsure NOX tank is different. I think a prefilled 38mm hybrid would sell well.

 

[kramer714]

29mm Ratt H with avionics bay.

 

[kramer714]

Clear tube 29 mm hybrid (I dont have a picture of the AVbay loaded used a 9v battery and Perfectflite Altimeter. . The motor is exposed, no body tube. an adapter screws to the top of the motor. Uses a microswitch to turn on.

 

[Voyager1]

The 29mm Rattworks I90 I used to fly got quite hot down the nozzle end where you have your 3D printed fin can. Do you have any issues with that?

 

[AeroTech]

The hardwear look so much differant than I remember. Forsure NOX tank is different. I think a prefilled 38mm hybrid would sell well.

The NOX tank is completely custom, made from 29mm RMS components. Not DOT-rated like the 54mm tanks. The 38mm design actually used a 54mm tank since there were no smaller commercial tanks available.

 

[crossfire]

The NOX tank is completely custom, made from 29mm RMS components. Not DOT-rated like the 54mm tanks. The 38mm design actually used a 54mm tank since there were no smaller commercial tanks available.

I think you had that motor at LDRS or Airfest one year on display. I remember seeing the 38mm with 54 tank somewhere. I still think a small prefilled hybrid would be a good educational motor. Might not be a high profit motor but good for students.

 

[DRAGON64]

They were all prefilled. This is from 20+ years ago. We have no plans to reintroduce the hybrid line at this time.

"at this time..."

Sounds to me to be a little open for future release. I would bet that a short run of hardware sets would sell out fast. Question; how much trouble was it for AeroTech to make the reloads? I seem to remember the "Turbo" loads used a little AP in the recipe. Honestly, the 98mm M845HW Turbo hybrid would be an awesome motor to fly and own.

http://www.aerotech-rocketry.com/customersite/products/motors/hybrid/hybridM845.html

 

[G_T]

Use a fuel grain that contains significant wax. In a small motor the wax will try to form a fluid layer over the nozzle inlet and help keep temperature down as it boils off. Similar deal as with liquid motors and the addition of Silicone oil.

Gerald

 

[AeroTech]

"at this time..."

Sounds to me to be a little open for future release. I would bet that a short run of hardware sets would sell out fast. Question; how much trouble was it for AeroTech to make the reloads? I seem to remember the "Turbo" loads used a little AP in the recipe. Honestly, the 98mm M845HW Turbo hybrid would be an awesome motor to fly and own.

http://www.aerotech-rocketry.com/customersite/products/motors/hybrid/hybridM845.html

I’ve learned to try and never say “never”. But it was some trouble and required a significant inventory to produce the AeroTech hybrid reloads. Not to mention the difficulty of sourcing the black powder pellets. All for a product line that amounted to about 1% of our sales in the best year. The Turbo loads used White Lightning grains which are significantly under-oxidized. The M845HW was indeed a great motor, I know at least a couple of people who got their L3 cert with it.

 

[jbrracer]

Hi all, anyone near Indiana Michigan Ohio, with hypertek GSE for sale or willing to setup with a partner? I’ve got a bunch of stuff coming definitely wanting a mentor. Also willing to share the hardware with a mentor or GSE owner.

 

[DRAGON64]

I’ve learned to try and never say “never”. But it was some trouble and required a significant inventory to produce the AeroTech hybrid reloads. Not to mention the difficulty of sourcing the black powder pellets. All for a product line that amounted to about 1% of our sales in the best year. The Turbo loads used White Lightning grains which are significantly under-oxidized. The M845HW was indeed a great motor, I know at least a couple of people who got their L3 cert with it.

Do you have any file footage of your hybrid designs in test or flight? In launches long past, I got to witness a J390 Turbo launch... At least I think that was the motor designation, and it was spectacular!

 

[AeroTech]

Do you have any file footage of your hybrid designs in test or flight? In launches long past, I got to witness a J390 Turbo launch... At least I think that was the motor designation, and it was spectacular!

I have some old video tape from the first flight tests stashed away, I would need to convert to digital media.

 

[ContrailRockets]

You are absolutely the right person for the job Tom!

If anyone can make an efficient 24mm hybrid motor, it's you

I look forward to seeing the fruits of your labor!

Sneak peek at CFF twin cylinder fill system
.375 orfice fill valve. 6 AN Braided Stainless Steel Teflon lined fill lines.