Estes 1/200 Scale RTF Saturn V

Discussion in 'Low Power Rocketry (LPR)' started by JumpJet, Jan 10, 2019.

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  1. May 3, 2019 #121

    gtg738w

    gtg738w

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    I’ve made some progress on a 24mm conversion. I’ll get some data on a C11 & D12 if the weather improves out here.

    C25C00F4-B541-40BF-A89A-E2A1DFA69E00.jpeg
     
  2. May 3, 2019 #122

    BABAR

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    Will it need some nose weight?
     
  3. May 3, 2019 #123

    gtg738w

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    The mount itself is pretty close in weight, but the motor is a good bit heavier. My plan is to balance back to where the original CG was with the C6-3. Not sure what it will take yet.
     
  4. May 5, 2019 #124

    dpower

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    I flew one on a C6-3, C12-4, and D16-4, on a dead calm day. The C6 was sufficient, but did arc over quite a bit, and was past apogee when it deployed. The Q-Jets were both nice straight flights.
     
  5. May 5, 2019 #125

    SecondRow

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    Do you have an estimate for the altitudes? I’m especially interested in the C12.
     
  6. May 5, 2019 #126

    BEC

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    I'm taking one of mine up to Sixty Acres shortly and intend to fly it with an altimeter aboard on those three motors. I'm still skeptical of the big delta between an Estes C6 and a Q-Jet C12 reported earlier in this thread, but should have data later today. Look on the FlightSketch logs to see.

    It's a little breezy so I may forgo the Estes C6-3. I'll figure that out when I get up there.
     
  7. May 6, 2019 #127

    BEC

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    All I got was the C6-3 flight - to 199 feet per the FS Mini. I was expecting it to arc over more based on the comments above, but the boost was pretty straight, really.

    However, the motor I used was rather old (1996) and the delay was WAY short. The upshot of that was that it ejected going up, the 'chute stripped three shroud lines and so it broke off two fins (and cracked the LES) on the bounced landing - even though it was on a grass field (the same one that's in the background in my avatar). One of the two broken fins resisted my attempts to reattach it with medium CA on the field, so I didn't attempt to repair or replace the 'chute while there.

    Next chance will be this coming Saturday at my own club launch (which I run)....but since we have two Cub Scout groups coming I don't know how much of a chance I'll get to fly myself. I will post the data when I have them.
     
  8. May 6, 2019 #128

    gtg738w

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    Ouch! I saw the flight you posted, looks like it ejected at ~85ft/s. That will do it for sure. Does the fin can look repairable? That seems like the weak link to me. I’m still trying to figure how to strengthen it and keep the clear fins.

    We had a brief break in the rain here on Saturday but I was helping with an elementary school launch and didn’t get a chance to fly mine. Hopefully soon, this week is looking better.
     
  9. May 6, 2019 #129

    BEC

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    The one balky fin will require epoxy fillets around the break I think. I need to make a small batch of epoxy to do fillets on a couple of contest models I'm building so I'll get do the S-V at the same time.

    The stock fins would probably be fine under the fully-open canopy of that 'chute, at least landing on most surfaces. But they do seem a bit thin - which of course helps performance.

    By the way (and this is probably more for the FS Mini thread) I didn't put any static ports of any kind in the Saturn V as I couldn't think of any place i wanted to put holes in the main body. So...I'm just depending on leakage around the separation joint for now.
     
  10. May 6, 2019 #130

    RocketT.Coyote

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    Ordered two from AC Supply about a month ago.
     
  11. May 8, 2019 #131

    shreadvector

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    I ordered 6 on Monday and they shipped and should arrive this coming Monday. Will launch with C6-3 at our club launch on 18-May. Then, assuming it survives, I will try one of the 25 C12-4 and D16-4 motors I ordered (along with 25 C12-6 and D16-6) which will also arrive next week. I ordered extras for other club members who never order online and want to buy in person with cash. No stores = no sales.
     
  12. May 19, 2019 at 3:01 AM #132

    gtg738w

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    I finally got to fly my Saturn Vs today. The stock 18mm with the C6-3 was a little disappointing. We had medium winds, ~10mph, and as soon as it left the rod, it took a hard turn upwind and only made it to 100ft. It ejected just before it hit the ground with surprisingly no damage except for a small tear in the 'chute.

    9FF3E9BE-AA7B-4F75-B090-25E5B2BDB93E.jpeg

    Next up was the 24mm mod with a C11-3. Much better flight, straight up to ~200 ft. Flew it again on a D12-5 and another great flight. Definitely the best of the bunch so far. Slight turn upwind to 400ft and easy recovery. Beautiful liftoff as well.

    3C21C35A-72C6-411A-B6A9-1745DEB31AD3.jpeg



    Flight log for the D12:
    https://flightsketch.com/flights/263/

    Will be flying this one again for sure!
     
    Last edited: May 19, 2019 at 3:46 AM
  13. May 21, 2019 at 4:04 AM #133

    gtg738w

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  14. May 21, 2019 at 7:31 PM #134

    BABAR

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    Again seems unfortunate that Estes puts out a(nother ) rocket that if built stock (18mm motor mount) doesn’t fly optimally with an Estes engine. From what I have seen so far, if I had one I’d either get a QJet D or upscale the mount to 24mm.

    I guess we will have more data July 20, as lots of posts have suggested many people plan to launch this commemorative rocket on the anniversary. Should be an interesting day. I wonder if at club launches RSOs may step in if the first few C6-3 flights are sub-nominal.
     
  15. May 23, 2019 at 3:01 AM #135

    terryg

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    Is there a rocksim file available for this rocket? If I get this kit, I would want use the D13W reloads that I already have. A white flame fits a Saturn V better then the black smoke of the QJets.
     
  16. May 23, 2019 at 12:19 PM #136

    GuyNoir

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    Bob Kaplow flew his on a C6-3 at our last club launch and it worked fine. Plenty of altitude for chute deployment.
     
  17. May 23, 2019 at 4:10 PM #137

    beeblebrox

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    There should not be a problem with that at all, clear fins plenty big enough. Not much difference in weight to a C6-3...There is plenty of room around the paper tube inside where it separates for a little clay...
     

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