MAC BlackFly build thread

Discussion in 'Mid Power Rocketry (MPR)' started by mpitfield, May 20, 2017.

Help Support The Rocketry Forum by donating:

  1. Apr 26, 2018 #271

    mpitfield

    mpitfield

    mpitfield

    Lifetime Supporter Staff Member TRF Lifetime Supporter Global Mod

    Joined:
    Jul 7, 2013
    Messages:
    4,319
    Likes Received:
    168
    Gender:
    Male
    Location:
    Toronto, Ontario
    I have heard this before and I think there is a misconception when it comes to when or why to use a deployment bag.

    There is no minimum size or complexity as to when you would or would not use a deployment bag. It is simply a choice. I use them regularly and if they are used as designed they do a good job of ensuring a reliable deployment. If you are a FruityChute user then just talk to Gene and ask him his opinion.

    Having said that, the smallest airframe I have used them in is a 3", but if they were a viable option for a smaller airframe I would use one without hesitation.
     
  2. Apr 26, 2018 #272

    AdAstraPerAspera

    AdAstraPerAspera

    AdAstraPerAspera

    Forum Supporter TRF Supporter

    Joined:
    Mar 15, 2016
    Messages:
    438
    Likes Received:
    13
    Careful. Fiberglass tubes are generally thinner than a glassed Sono tube. And the Sono tube may not have a good ID tolerance either. You might be better off with a custom nose. Have you considered Python Rocketry? I've handled his stuff and it's nice, and probably lighter than filament wound. He could do your tailcone too.

    http://www.pythonrocketry.com
     
  3. Apr 26, 2018 #273

    rharshberger

    rharshberger

    rharshberger

    Well-Known Member

    Joined:
    Oct 13, 2014
    Messages:
    8,081
    Likes Received:
    660
    Gender:
    Male
    Location:
    Pasco, WA
    Plus Sono tubes are "nominally" size to the diameter they state, the 8" could be 7.5 to 8.5" OD depending on whether or not its the inner or outer of the nested pair (sonotubes are shipped as nested pairs and both are the "same" diameter), make sure and have the tube before buying a nosecone.
     
  4. Apr 26, 2018 #274

    mperegrinefalcon

    mperegrinefalcon

    mperegrinefalcon

    Well-Known Member

    Joined:
    Jun 13, 2017
    Messages:
    245
    Likes Received:
    29
    Ya, the nosecone is pretty much the last thing I'm going to buy. I already bought the Sano tube. When I got it I made sure they were both the same outer diameter. I'm going to measure their inner diameter when I get home, and I will figure it out from there. I will probably get the NC from Python if the inner diameter doesn't match madcow. Getting the tailcone from python would be very easy and I'll look into it, though I think I could make my own fiberglass part pretty easily with 4 layers of 4oz cloth over some cardboard and another make-shift coupler from some of the leftover sanotube.
     
  5. Apr 29, 2018 #275

    CzTeacherMan

    CzTeacherMan

    CzTeacherMan

    Well-Known Member

    Joined:
    Aug 8, 2014
    Messages:
    2,757
    Likes Received:
    111
    I'll be there... VERY excited to see it fly. Let me know if you need field support, recovery, etc.
     
  6. Jun 16, 2019 #276

    CzTeacherMan

    CzTeacherMan

    CzTeacherMan

    Well-Known Member

    Joined:
    Aug 8, 2014
    Messages:
    2,757
    Likes Received:
    111
    A year after I burnt up my first Black Fly, I finally got around to painting (sort of) the new body. Nosecone is from the original, everything else is "new". Tried a new paint scheme; mostly based on what I had laying around. Maybe I'll fly it at URRF 6 as a redemption flight... IMG_20190616_103542.jpeg
     
    Last edited: Jun 16, 2019
    gfunk and liv3mind like this.
  7. Jun 16, 2019 #277

    mpitfield

    mpitfield

    mpitfield

    Lifetime Supporter Staff Member TRF Lifetime Supporter Global Mod

    Joined:
    Jul 7, 2013
    Messages:
    4,319
    Likes Received:
    168
    Gender:
    Male
    Location:
    Toronto, Ontario
    I just finished my 4". Unfortunately, I am having issues with the tracker and both altimeters. So far, the manufacturer has ignored my repeated requests for help, so I am left to wonder if they are having more significant issues.

    The supplier is trying to help, but it's slow and too late for URRF, which Is where I was hoping to debut the build

    IMG_20190612_021213__01.jpg
     
    gfunk and CzTeacherMan like this.
  8. Jun 16, 2019 #278

    CzTeacherMan

    CzTeacherMan

    CzTeacherMan

    Well-Known Member

    Joined:
    Aug 8, 2014
    Messages:
    2,757
    Likes Received:
    111
    That looks great, Mike! Bring it with, we'll get in the air! If needed, you can borrow my Altimeter sled... Either way, I wanna see that in person.
     
  9. Jun 16, 2019 #279

    Onebadhawk

    Onebadhawk

    Onebadhawk

    Sponsor TRF Sponsor

    Joined:
    Jan 11, 2013
    Messages:
    5,607
    Likes Received:
    145
    Gorgeous build Mike..
    I wouldn't expect anything less..

    Teddy
     
  10. Jun 16, 2019 #280

    mike2wander

    mike2wander

    mike2wander

    MAC Performance Rocketry TRF Sponsor

    Joined:
    Jun 25, 2012
    Messages:
    370
    Likes Received:
    106
    You guys do realize if you look up BlackFly in the dictionary that you'll find a picture of Mike Pitfield right. Thanks so much for starting the swarm Mike!!
     
    Last edited: Jun 17, 2019
    CzTeacherMan and liv3mind like this.
  11. Jun 16, 2019 #281

    mpitfield

    mpitfield

    mpitfield

    Lifetime Supporter Staff Member TRF Lifetime Supporter Global Mod

    Joined:
    Jul 7, 2013
    Messages:
    4,319
    Likes Received:
    168
    Gender:
    Male
    Location:
    Toronto, Ontario
    Mike I have been compared to much worse...I think. Rereading this, there are way too many Mikes.
     
    CzTeacherMan and spigalau like this.
  12. Jun 17, 2019 #282

    CzTeacherMan

    CzTeacherMan

    CzTeacherMan

    Well-Known Member

    Joined:
    Aug 8, 2014
    Messages:
    2,757
    Likes Received:
    111
    A swarm of flies and a swarm of Mikes.
    I once knew a guy named Mike Mikes...
     
  13. Jun 17, 2019 #283

    mpitfield

    mpitfield

    mpitfield

    Lifetime Supporter Staff Member TRF Lifetime Supporter Global Mod

    Joined:
    Jul 7, 2013
    Messages:
    4,319
    Likes Received:
    168
    Gender:
    Male
    Location:
    Toronto, Ontario
    Some parents are so crule. I was just talking about naming kids the other day and Frank Zappa came up.
     
    CzTeacherMan likes this.
  14. Jun 17, 2019 #284

    Bobfly

    Bobfly

    Bobfly

    Lifetime Supporter TRF Lifetime Supporter

    Joined:
    Jul 3, 2017
    Messages:
    184
    Likes Received:
    19
    Mike you should bring your Black Fly to URRF 6 anyway. Everyone will want to see your cool paint job on static display.

    All the best,
    Bob
     
    CzTeacherMan likes this.
  15. Jun 17, 2019 #285

    mike2wander

    mike2wander

    mike2wander

    MAC Performance Rocketry TRF Sponsor

    Joined:
    Jun 25, 2012
    Messages:
    370
    Likes Received:
    106
    Bob,

    I will be bringing my 6" Fly. It will launch on Friday. The 11.4" MENACE 442 will fly on Saturday
     

    Attached Files:

    CzTeacherMan likes this.
  16. Jun 17, 2019 #286

    spigalau

    spigalau

    spigalau

    Well-Known Member

    Joined:
    May 12, 2019
    Messages:
    124
    Likes Received:
    21
    Gender:
    Male
    Location:
    Auckland, New Zealand
    And this is why Mike drives 2 RV's, one for accommodation & one for projectile storage...
     
  17. Jun 21, 2019 #287

    roytyson

    roytyson

    roytyson

    Well-Known Member

    Joined:
    Oct 31, 2017
    Messages:
    205
    Likes Received:
    94
    I hope Im not kicked out of the cool kids club. Since I never color in the lines and rarely conform to the norm, I didn't start now. I went with Green/copper color shift paint, and chrome letters. What do ya think?
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
    numbo, Tobor, Banzai88 and 3 others like this.
  18. Jun 21, 2019 #288

    CzTeacherMan

    CzTeacherMan

    CzTeacherMan

    Well-Known Member

    Joined:
    Aug 8, 2014
    Messages:
    2,757
    Likes Received:
    111
    That's awesome. Superior!
     
  19. Jun 21, 2019 #289

    mpitfield

    mpitfield

    mpitfield

    Lifetime Supporter Staff Member TRF Lifetime Supporter Global Mod

    Joined:
    Jul 7, 2013
    Messages:
    4,319
    Likes Received:
    168
    Gender:
    Male
    Location:
    Toronto, Ontario
    I love it!
     
  20. Jul 8, 2019 #290

    mpitfield

    mpitfield

    mpitfield

    Lifetime Supporter Staff Member TRF Lifetime Supporter Global Mod

    Joined:
    Jul 7, 2013
    Messages:
    4,319
    Likes Received:
    168
    Gender:
    Male
    Location:
    Toronto, Ontario
    Thought I would post the latest pic of my 54mm BlackFly leaving the rail. This was from the monthly CRC club launch and launched on a CTI G106 Skid. Great reload, lots of flame and noise. It hit 1,755' AGL with main @ 300' using the JLCR. The recovery was picture perfect, except for the fact that I used a hanging charge that ricochets off the body and split the airframe. I should have known better as I did this on another airframe (FWFG), maybe I will learn my lesson.

    LastLaunchG108Cropped.jpg

    I used the spent cap off a diabetic needle that goes onto the diabetic pens. It is just the right size for this purpose. However, the plastic is far too hard and has sharp edges, ergo two damaged airframes. I will post pics of the damage later, for now, enjoy this pic.
     
  21. Jul 8, 2019 #291

    spigalau

    spigalau

    spigalau

    Well-Known Member

    Joined:
    May 12, 2019
    Messages:
    124
    Likes Received:
    21
    Gender:
    Male
    Location:
    Auckland, New Zealand
    How bad is the split ?

    And pretty photo !
     
  22. Jul 8, 2019 #292

    mike2wander

    mike2wander

    mike2wander

    MAC Performance Rocketry TRF Sponsor

    Joined:
    Jun 25, 2012
    Messages:
    370
    Likes Received:
    106
    I'll second that! That looks great. Sometimes coloring outside the lines just makes sense. :cool:
     
  23. Jul 9, 2019 at 2:46 AM #293

    mpitfield

    mpitfield

    mpitfield

    Lifetime Supporter Staff Member TRF Lifetime Supporter Global Mod

    Joined:
    Jul 7, 2013
    Messages:
    4,319
    Likes Received:
    168
    Gender:
    Male
    Location:
    Toronto, Ontario
    After a bit of contemplation, I have another theory that I believe makes more sense and matches my observations. Please let me know your thoughts?

    The last time this happened, I blew a small hole through a thin-wall FW/FG airframe, not just a crack. At that time, and up until now, I thought it was because of the hanging BP holder ricocheting off the inside of the airframe.

    I just inspected and cleaned the inside of BF airframe, and I noted a very dark and concentrated scorch mark around the split. I also clearly recalled, that when I ground tested these spent diabetic needle caps, the intensity of sound was far greater than anything I had experienced before. It was so loud that my ears rang for about ten min. I have done a lot of ground testing, and nothing has compared, even with twice the load. At the time, I just passed it off.

    Below is my new theory, which I am sure will be fairly obvious to some of you. The base of the hanging charge was likely facing, as well as up against the inside wall of the airframe. Combining this with the rigidity of the cap, which probably focused the blast, it resulted in what you see below.
    IMG_20190708_183819__01.jpg IMG_20190708_183758__01.jpg
    Below are some pics of the spent hanging charge cap.
    BFHangingChargeCap.jpg
    IMG_20190708_184301.jpg
    As you can see, the cap survived both the expanding hot gases and the heat with nothing more than some minor discolouration.
    IMG_20190708_184313.jpg
    This brings me to my plan to resurrect the original BF.
    IMG_20190708_184654__01.jpg IMG_20190708_184629__01.jpg
    Instead of fixing it as a flight-ready airframe, which would necessitate some body work inside and outside, I am just going to make it visually "fixed" and leave it as a static model. I am going to repurpose this nosecone, which is not the original and make use of some left-over Mac 54mm CF airframe. I also have some perfectly sized CF plate that I have been looking for something to use it on.

    This will be a one-off custom all CF BlackFly that I will leave natural, just a thin layer of epoxy to cover it and bring out a shine, and a very subtle black on black BlackFly logo with red eyes.
     
    CzTeacherMan likes this.

Share This Page