Help Support RocketryForum by donating using the link above or becoming a Supporting Member.


Results 1 to 16 of 16
  1. #1
    Join Date
    28th June 2016
    Location
    PA
    Posts
    662

    Chute Release with large chutes

    I have a chute release and like it. I am flying a 10in diameter rocket with a single compartment and no real space to do a proper dual deploy. Can I use the chute release with an 8' rocketman chute? The manual and spec pages do not reference a max size, only to use the large band for chutes over 36in.

    So, does anyone have experience using the CR with that big a chute and if so, any special considerations or folding techniques?

    TRA #10518 ---- MDRA #106

    L1, 6/25/2016: Modified MadCow Super Batray, CTI I236 BS
    L2, 9/17/2016: Modified RW Patriot, CTI J280 SS
    L3, 4/8/2017: RW Formula 200, CTI M1810 RL

    Max Altitude: 4,978', L3 Cert flight
    Max Speed: Mach ???, L3 Cert flight

  2. #2
    Join Date
    5th December 2013
    Location
    MD
    Posts
    6,398
    Quote Originally Posted by NateLowrie View Post
    I have a chute release and like it. I am flying a 10in diameter rocket with a single compartment and no real space to do a proper dual deploy. Can I use the chute release with an 8' rocketman chute? The manual and spec pages do not reference a max size, only to use the large band for chutes over 36in.

    So, does anyone have experience using the CR with that big a chute and if so, any special considerations or folding techniques?
    Never done it, but if you can find a rubberband long enough to fit around your chute, but narrow enough to go through the eye of the pin, you can use it. JLCR doesn't care what size the chute is. I would set it for 200' higher than you really want it to deploy (e.g., if you're thinking 500', set it for 700'). That will give it time to release and the chute unfold completely.

    I have used mine in smaller rockets, sometimes wrapping it around the Nomex, and sometimes inside the Nomex, directly on the chute. Others may have some best practices.


    John S. ---- NAR #96911 ---- TRA #15253 ---- MDRA #067 ---- BARC #028
    L1, 3/15/14: Aerotech Sumo, CTI H133BS
    L2, 6/21/14: Giant Leap Vertical Assault, CTI J240RL
    L3, 3/12/16: MAC Performance Radial Flyer, CTI M1101WH
    Altitude: 13,028', L3 flight; Speed: Mach ???, L3 flight

  3. #3
    Join Date
    8th August 2014
    Location
    Rockford, IL
    Posts
    2,316
    Quote Originally Posted by NateLowrie View Post
    I have a chute release and like it. I am flying a 10in diameter rocket with a single compartment and no real space to do a proper dual deploy. Can I use the chute release with an 8' rocketman chute? The manual and spec pages do not reference a max size, only to use the large band for chutes over 36in.

    So, does anyone have experience using the CR with that big a chute and if so, any special considerations or folding techniques?
    Yes, very usable.
    If you want redundant, you can strong 2 JLCRs together between two rubberbands. I've traded out the rubberband for elastic before and it worked fine; the key is to have something that will pull the pin when it releases. It's really no different than a cable cutter.
    -CzTeacherMan
    TRA #15280 - QCRS, Tripoli Wisconsin, WOOSH
    Level 1 - 9/28/2014 Wildman Sport on CTI H163 White Thunder
    Level 2 - 5/23/2015 Wildman 3" Darkstar CTI J400 Smoky Sam
    First Mile+ & Mach+ - 9/25/2015 Wildman Punisher CTI J360 Skidmark
    Level 3 - 5/15/2016 Wildman Gizmo XL-DD-V CTI M1540 Imax

  4. #4
    Join Date
    5th June 2010
    Location
    Danville, CA
    Posts
    695
    Yes, these comments are all correct. Also: we're working on a "large rocket deployment bag" powered by Chute Release. In development.

  5. #5
    Join Date
    22nd July 2011
    Location
    Where ever the the boss sends me...
    Posts
    2,588
    I used it on a 72" chute a couple weeks ago. I put 2 bands together to get around the bundle. In my case, the CR worked, but my packing job did not (never unrolled). If you use the protective pouch from Dino Chutes, be very careful with the velcro, that is what bit me.
    In the future on my large chutes I will be holding the chute closed/reefed with the CR, but leaving the bulk of the material to unroll and act like a streamer. YMMV
    Terry

    NAR L1
    Maybe L2 soon if I can stop wrecking the rocket......

  6. #6
    Join Date
    8th August 2014
    Location
    Rockford, IL
    Posts
    2,316
    Quote Originally Posted by John Beans View Post
    Yes, these comments are all correct. Also: we're working on a "large rocket deployment bag" powered by Chute Release. In development.
    John... Just so you know... Many of us imagine your home/workshop is like a Willy Wonka shop for rockets...
    -CzTeacherMan
    TRA #15280 - QCRS, Tripoli Wisconsin, WOOSH
    Level 1 - 9/28/2014 Wildman Sport on CTI H163 White Thunder
    Level 2 - 5/23/2015 Wildman 3" Darkstar CTI J400 Smoky Sam
    First Mile+ & Mach+ - 9/25/2015 Wildman Punisher CTI J360 Skidmark
    Level 3 - 5/15/2016 Wildman Gizmo XL-DD-V CTI M1540 Imax

  7. #7
    Join Date
    18th January 2009
    Location
    Urff
    Posts
    6,771
    A 48" Fruity Chute is the largest I have gone. Four flights so far with that chute.

    I'm currently using a Fruity Chutes parachute sleeve...like a deployment bag but much much simpler and lighter. No problems with the rubber band of the Chute Release.
    Cranky Kong, Certified Rocket Monkey
    "But we were promised jet packs!"

    Total Impulse in 2017: 605.77 Ns (Equivalent to an 89% I motor)
    Total Impulse since 2010: 13,872.11 Ns (Equivalent to a 35% N motor)

  8. #8
    Join Date
    28th June 2016
    Location
    PA
    Posts
    662
    Thanks for the info. I think I am going to start with one large band and see if I can fit it around the chute.

    John, I would be HIGHLY interested in the deployment bag.
    TRA #10518 ---- MDRA #106

    L1, 6/25/2016: Modified MadCow Super Batray, CTI I236 BS
    L2, 9/17/2016: Modified RW Patriot, CTI J280 SS
    L3, 4/8/2017: RW Formula 200, CTI M1810 RL

    Max Altitude: 4,978', L3 Cert flight
    Max Speed: Mach ???, L3 Cert flight

  9. #9
    Join Date
    5th June 2010
    Location
    Danville, CA
    Posts
    695
    Quote Originally Posted by CzTeacherMan View Post
    John... Just so you know... Many of us imagine your home/workshop is like a Willy Wonka shop for rockets...
    That would explain why my kids have a distinct orange tint to them...

    There have been quite a number of prototypes that have been built over the years. For instance, I once built a prototype of a product that I called Wander. It was a wand-shaped rocket finder. It vibrated when you were pointing it toward your rocket, so very easy to use. But highly complex, expensive, short battery life, and too fussy. Perhaps I'll revisit someday. There was also a product called Flight Recorder, which was a complete inertial tracking unit (with gyros) that I was developing for a British flight demonstration team and the Felix Baumgartner jump. When I couldn't get it done in time for his jump (they saved me space in his pack), I morphed it into AltimeterThree.

  10. #10
    Join Date
    11th July 2016
    Posts
    33
    I've done it successfully with some chutes, but with my large LOC 60", I'm 0/3.... The rubber band seems to stick to the chute and I have not found a way to consistently release it. I haven't tried the nylon method - but do watch for any stickiness with the chute.

  11. #11
    Join Date
    28th June 2016
    Location
    PA
    Posts
    662
    Quote Originally Posted by EBurg View Post
    I've done it successfully with some chutes, but with my large LOC 60", I'm 0/3.... The rubber band seems to stick to the chute and I have not found a way to consistently release it. I haven't tried the nylon method - but do watch for any stickiness with the chute.
    Good to know. Instead of attached the CR band around the chute and putting a nomex blanket over it, could you put the CR around the nomex?
    TRA #10518 ---- MDRA #106

    L1, 6/25/2016: Modified MadCow Super Batray, CTI I236 BS
    L2, 9/17/2016: Modified RW Patriot, CTI J280 SS
    L3, 4/8/2017: RW Formula 200, CTI M1810 RL

    Max Altitude: 4,978', L3 Cert flight
    Max Speed: Mach ???, L3 Cert flight

  12. #12
    Join Date
    5th June 2010
    Location
    Danville, CA
    Posts
    695
    Best to also also protect the CR with the nomex, and tether the nomex in such a way that it is "whisked off" the bundle at ejection. You don't want the nomex to stay wrapped around the bundle during descent, because it could keep the chute from inflating after release.

  13. #13
    Join Date
    20th April 2012
    Location
    Fredericksburg VA
    Posts
    1,456
    The biggest parachute that I have used with a Jolly Logic Chute Release is a 72" FruityChute with my Upscale Onyx. No problems.
    NAR Level 2 #96210

  14. #14
    Join Date
    21st January 2009
    Location
    Manitowoc, WI
    Posts
    2,055
    Biggest tried was a 78" Crossfire and a 84" standard chute in our Top Gun drag race at LDRS this year. I used a nomex pad on the 78" X-fire, my Dad used the big band directly on the 84"; both worked as intended!
    Eric Cayemberg
    TRA 7783 L3
    TAP

  15. #15
    Join Date
    22nd August 2015
    Location
    Rhode Island
    Posts
    1,016
    The biggest chute I've tried with the JLCR is a 45" octagon chute from Binder Design. It's worked perfectly 3/3 times. It doesn't pack as tightly as some of the thin mill chutes, so it is a relatively large bundle. I didn't have any large rubber bands, so I daisy chained three small ones together. It worked so well, that I'm planning to use this set up for my L2 certification flight.
    NAR #100940, RIMRA & CMASS
    L1 - 4/17/16, Tyrannosaur (by Binder Design), Loki H144
    L2 - 8/19/17, Terrordactyl (by Binder Design), CTI J250

  16. #16
    Join Date
    28th June 2016
    Location
    PA
    Posts
    662
    Just an update: the 8' rocketman packed nicely and I was able to use the large band without problems. I'll have a flight update when it flies on Saturday.

    TRA #10518 ---- MDRA #106

    L1, 6/25/2016: Modified MadCow Super Batray, CTI I236 BS
    L2, 9/17/2016: Modified RW Patriot, CTI J280 SS
    L3, 4/8/2017: RW Formula 200, CTI M1810 RL

    Max Altitude: 4,978', L3 Cert flight
    Max Speed: Mach ???, L3 Cert flight

Similar Threads

  1. Who Used Chute Release for L1, L2, or L3?
    By John Beans in forum Rocketry Electronics and Software
    Replies: 88
    Last Post: 21st September 2017, 06:52 PM
  2. Chute Release Again!!!
    By Lowpuller in forum Recovery
    Replies: 10
    Last Post: 27th June 2017, 08:29 PM
  3. Chute Release & Plastic Chutes
    By ActingLikeAKid in forum Recovery
    Replies: 10
    Last Post: 8th March 2016, 04:12 AM
  4. The R/C Chute Sled: simple R/C chute release unit
    By tab28682 in forum Rocketry Electronics and Software
    Replies: 3
    Last Post: 20th December 2015, 03:15 AM
  5. Fruity Chutes - On Landing Bridal Release
    By eengelgau in forum Recovery
    Replies: 21
    Last Post: 3rd August 2011, 03:39 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •