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


Page 2 of 7 FirstFirst 1 2 3 4 5 6 ... LastLast
Results 31 to 60 of 190
  1. #31
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by stealth6 View Post
    I'm so following this thread. Had something similar in my fleet a while back.

    For what it's worth....the Telemini is THE avionics package for something like this. AFAIK, nothing else on the market comes close to providing deployment and tracking needed for something like this (taking into account available space and mass allowance). And yes, it is RF only, which is plenty good enough....while it is true that GPS has become much more the norm these days it seems, there is a long history of rocket tracking via RF before GPS was so affordable and available to the masses. Get some advice from folks with experience in RF tracking - it will serve you well.

    Can't wait for more, and hopefully some successful flight reports,
    good luck,
    s6
    I agree, the telemini is an awesome flight computer.

    trffan has been retired

  2. #32
    Join Date
    26th November 2009
    Posts
    4,916
    Quote Originally Posted by TRFfan View Post
    And also, do you need a teledongle too to track the telemini?
    As others have said, no. You need an H/T that can receive the beacon signal, an attenuator (mechanical or electronic) and a Yagi antenna for 70cm and RDF work. The Telemini is not GPS/APRS and doesn't require a TNC, teledongle or teleBT.

    For small projects such as this, a beacon/deployment altimeter like the Telemini is the only thing that fits the bill. If flying out on the playa and it drifts far, might have issues because once on the ground, the ground footprint is very small. The salts in the Playa attenuate the Rf once the rocket has landed.

    I'd suggest a handheld mapping GPS that has a "sight 'n go" feature that will lock a bearing for one to follow. Hold it parallel to the Yagi beam
    and lock the bearing as soon as the signal is lost. It's better than nothing.

    I note the Telemini is out of stock and don't know if they'll be making them again. Kurt


  3. #33
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by ksaves2 View Post
    As others have said, no. You need an H/T that can receive the beacon signal, an attenuator (mechanical or electronic) and a Yagi antenna for 70cm and RDF work. The Telemini is not GPS/APRS and doesn't require a TNC, teledongle or teleBT.

    For small projects such as this, a beacon/deployment altimeter like the Telemini is the only thing that fits the bill. If flying out on the playa and it drifts far, might have issues because once on the ground, the ground footprint is very small. The salts in the Playa attenuate the Rf once the rocket has landed.

    I'd suggest a handheld mapping GPS that has a "sight 'n go" feature that will lock a bearing for one to follow. Hold it parallel to the Yagi beam
    and lock the bearing as soon as the signal is lost. It's better than nothing.
    That sounds interesting, do you have any pictures of such of a setup?

    Quote Originally Posted by ksaves2 View Post
    I note the Telemini is out of stock and don't know if they'll be making them again. Kurt
    I'll try to contact the manufacturer and see what he says. If they arent making them any more then I'll try to get a used telemini.
    trffan has been retired

  4. #34
    Join Date
    5th August 2015
    Posts
    1,180
    UPDATE; just added the RASAero file in the original post.
    trffan has been retired

  5. #35
    Join Date
    5th August 2015
    Posts
    1,180
    updated ork file.
    trffan has been retired

  6. #36
    Join Date
    5th August 2015
    Posts
    1,180
    Ordered the body tube and fins. Should arrive within a couple weeks.
    trffan has been retired

  7. #37
    Join Date
    13th June 2014
    Location
    Cocoa Beach, FL
    Posts
    3,556
    Quote Originally Posted by TRFfan View Post
    Ordered the body tube and fins. Should arrive within a couple weeks.
    Who did you end up buying from?
    Tim
    L3 NAR 98225

  8. #38
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by timbucktoo View Post
    Who did you end up buying from?
    I got the fins from TRF user sinfuldarklord (and some extras from carolina composites). The body tube also came from carolina composites.
    trffan has been retired

  9. #39
    Join Date
    5th August 2015
    Posts
    1,180
    Final design here. Altitude and speed in OR and RASAero are similar (mach 1.6 and 9700 ft).

    Attachment 316014

    EDIT; new file.
    trffan has been retired

  10. #40
    Join Date
    13th June 2014
    Location
    Cocoa Beach, FL
    Posts
    3,556
    Quote Originally Posted by TRFfan View Post
    Final design here. Altitude and speed in OR and RASAero are similar (mach 1.6 and 9700 ft).
    Then it's time to build!
    Tim
    L3 NAR 98225

  11. #41
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by timbucktoo View Post
    Then it's time to build!
    Yep!
    trffan has been retired

  12. #42
    Join Date
    30th January 2016
    Location
    US > OK > NE
    Posts
    3,478
    I may have missed it ; how are you smoothing the NC ?

    And have you seen the new Eggfinder Mini ? Just the ticket for this sort of bird.

    Telemini v3 is also supposed to be out at the beginning of April.
    Last edited by dhbarr; 22nd March 2017 at 10:33 PM.

  13. #43
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by dhbarr View Post
    I may have missed it ; how are you smoothing the NC ?

    And have you seen the new Eggfinder Mini ? Just the ticket for this sort of bird.

    Telemini v3 is also supposed to be out at the beginning of April.
    The ridges will be wet sanded down with extremely fine sandpaper and polishing will be done by an auto body shop.

    I did see the eggfinder mini but it's a bit too large for my nose cone, with all the stuff packed in there. Also the body tube is crammed full and reduced to the smallest length, so storing it there would make me lose 1-2 thousand ft in altitude. So i dont think i'll go for that.

    I heard about the telemini but i might instead get a used one if anyone has it to cut the project cost down.
    trffan has been retired

  14. #44
    Join Date
    1st May 2009
    Location
    Perth, Western Australia
    Posts
    103
    Make sure you test your receiver/TeleMini combo before you're out in the field as I've yet to pick up any radio transmissions from the TeleMini on my VX-8GR despite being on the transmit frequency. That said I can connect to it via a Teledongle so it's obviously sending and receiving radio packets. I suspect it's something simple to configure my VX-8GR to "hear" my TeleMini but I've yet to do this on the bench. Anyone out there have any tips for configuring non AltusMetrum radios for picking up TeleMini transmissions for RDF purposes?

  15. #45
    Join Date
    3rd February 2009
    Location
    Falmouth, NS, Canada
    Posts
    351
    [QUOTE=plugger;1680321]Make sure you test your receiver/TeleMini combo before you're out in the field as I've yet to pick up any radio transmissions from the TeleMini on my VX-8GR despite being on the transmit frequency. That said I can connect to it via a Teledongle so it's obviously sending and receiving radio packets. I suspect it's something simple to configure my VX-8GR to "hear" my TeleMini but I've yet to do this on the bench. Anyone out there have any tips for configuring non AltusMetrum radios for picking up TeleMini transmissions for RDF purposes

    I haven't had any trouble hearing the telemini when I had one. My previous post now edited/ deleted was concerning the telemetrum V1.

    Greg
    Last edited by rms; 24th March 2017 at 03:29 AM. Reason: Answered concerning another Altus Metrum product
    TRA 10756 L3
    CAR S922 L4, RSO
    VE1GCG

  16. #46
    Join Date
    1st May 2009
    Location
    Perth, Western Australia
    Posts
    103
    Quote Originally Posted by rms View Post
    I haven't had any trouble hearing the telemini when I had one. My previous post now edited/ deleted was concerning the telemetrum V1.
    I don't doubt that. But my experiences has been different. What model TeleMini did you have? Mine's a v1. And what radio did you use for receiving from the TeleMini? As mentioned mine's a Yaesu VX-8GR. Most likely our two radios have different configurations, hence your ability to hear the traffic from the TeleMini whilst I've been unable to do so.

    Please don't get me started on the Telemetrum v1. I got bit by the "bug" in the battery voltage regulators that caused the LiPo to stop powering the board when the board attempted to fire the apogee deployment charge in a 38mm minimum diameter J570W flight. Nothing like having your radio go silent at near 12k ft. I've still never found the thing and that was YEARS ago.

  17. #47
    Join Date
    3rd February 2009
    Location
    Falmouth, NS, Canada
    Posts
    351
    Quote Originally Posted by plugger View Post
    I don't doubt that. But my experiences has been different. What model TeleMini did you have? Mine's a v1. And what radio did you use for receiving from the TeleMini? As mentioned mine's a Yaesu VX-8GR. Most likely our two radios have different configurations, hence your ability to hear the traffic from the TeleMini whilst I've been unable to do so.

    Please don't get me started on the Telemetrum v1. I got bit by the "bug" in the battery voltage regulators that caused the LiPo to stop powering the board when the board attempted to fire the apogee deployment charge in a 38mm minimum diameter J570W flight. Nothing like having your radio go silent at near 12k ft. I've still never found the thing and that was YEARS ago.
    My telemini has been gone awhile but I would say it was a V1 as it certainly was first gen model. I didn't have any problem hearing it's rf beacon tones on both a Icom IC-T7H and a Kenwood TH-D7A.

    I fly Telemetrum V1 and V2 now but still insist on having a BRB gps along for the ride as my flights over the last couple years have been from 13K to 24K with recoveries up to 2-3 miles away and our recovery area is definitely not flat desert here in Eastern Canada! Tracking redundancy seems prudent to me.
    Honestly having a flight go unseen after the initial boost out of sight and to then walk to the recovery area knowing it is 2.5 miles away puts some real faith in the tracking components working! Awesome when they work, (insert profanity here) frustrating if they don't and really no place to even start a search

    Greg
    TRA 10756 L3
    CAR S922 L4, RSO
    VE1GCG

  18. #48
    Join Date
    5th August 2015
    Posts
    1,180
    UPDATE; Recieved body tube and fins from carolina composites. I roughed up the body tube a bit to help the fins get a better grip of the surface. I still have to get the proline 4500 (its out of stock right now) and syringes. If i can get someone to redesign my fin guides i can have them tacked on to the body tube soon.

    Attachment 316015
    trffan has been retired

  19. #49
    Join Date
    21st May 2016
    Location
    Northern Alabama
    Posts
    358


    fm
    "What'd I learn after 20 years of service? That EA-6B's, F-18D/G's, P-3A/B/C's, A-6's are in real life very large..."
    L1 - Madcow 2.6 Arcas / First Flight / AT100W-14 / May 7th, 2016
    L2 - Madcow 4.0 AGM-58 / Assembly postponed indefinitely
    L3 - Scratch Upscale ASM (just a dream now)

  20. #50
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by Forever_Metal View Post


    fm
    Thanks! The fins and body tube turned out to be very nice.
    trffan has been retired

  21. #51
    Join Date
    13th June 2014
    Location
    Cocoa Beach, FL
    Posts
    3,556
    Wildman has some Proline. Also you can use JB Weld to tack them on but if your fin guide is wrong size what's the point!
    Tim
    L3 NAR 98225

  22. #52
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by timbucktoo View Post
    Wildman has some Proline. Also you can use JB Weld to tack them on but if your fin guide is wrong size what's the point!
    I dont have actual fin guides right now, just the CAD model is made wrong. And wildman has it in a pint size kit, i need it in a 8oz kit which is half the price. I dont want to spend more money on this then i have to. I'm tacking the fins on with BSI 5 minute epoxy.
    trffan has been retired

  23. #53
    Join Date
    5th August 2015
    Posts
    1,180
    Body tube scuffed up more with x acto knife. Shown here loaded with g150 and fin.

    Attachment 316022
    trffan has been retired

  24. #54
    Join Date
    5th August 2015
    Posts
    1,180
    Fin guide ordered from shapeways.
    trffan has been retired

  25. #55
    Join Date
    27th November 2011
    Location
    Eastern Canada
    Posts
    2,183
    NICE!!
    CAR S 1096 Level 3 | My YouTube channel
    NB Rocketry.
    Like us on Facebook!

  26. #56
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by rocketgeek101 View Post
    NICE!!
    Thanks!
    trffan has been retired

  27. #57
    Join Date
    25th October 2016
    Location
    Texas, United States
    Posts
    1,697
    Great work.

    What's the angle of the bevel on the fins?

  28. #58
    Join Date
    5th August 2015
    Posts
    1,180
    Quote Originally Posted by Incongruent View Post
    Great work.

    What's the angle of the bevel on the fins?
    I would guess around 45 degrees.
    trffan has been retired

  29. #59
    Join Date
    18th November 2014
    Location
    Somewhere in Ohio
    Posts
    870
    Quote Originally Posted by TRFfan View Post
    Body tube scuffed up more with x acto knife. Shown here loaded with g150 and fin.

    Attachment 316022
    Those are some small fins! The rocket looks good so far,
    When do you plan to launch this? When you do, make sure to post some pics & some vids if you can!!
    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 46.02 Ns _ Biggest motor, CTI G106, highest flight around 3,500' - TRA Member #17056
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  30. #60
    Join Date
    25th October 2016
    Location
    Texas, United States
    Posts
    1,697
    Quote Originally Posted by TRFfan View Post
    I would guess around 45 degrees.
    Sorry, I wasn't clear in my question.

    I drew up an exaggerated and not to scale picture to try and clarify; angles x and y are what I refer to by bevels. I'm not sure if you interpreted the meaning as of angle z.

    Again, my apologies.

    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_2786.jpg 
Views:	62 
Size:	47.2 KB 
ID:	316032  

Similar Threads

  1. CTI G150
    By TRFfan in forum The Watering Hole
    Replies: 10
    Last Post: 29th January 2017, 01:07 AM
  2. 24mm MD 10,000 ft and Mach 1.6 on a CTI G150
    By TRFfan in forum Mid Power Rocketry (MPR)
    Replies: 134
    Last Post: 8th September 2016, 12:36 AM
  3. Replies: 19
    Last Post: 7th March 2016, 06:35 AM
  4. Another Centuri Mach-10 Clone, a Mach-F86
    By naslrogues in forum Low Power Rocketry (LPR)
    Replies: 10
    Last Post: 18th June 2015, 09:49 PM
  5. Replies: 7
    Last Post: 27th February 2004, 09:04 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
  •