Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Page 1 of 3 123 LastLast
Results 1 to 25 of 54

  1. #1
    SAL98's Avatar
    Join Date
    Jan 2002
    Location
    RIDGENew York
    Posts
    593
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    50cc Class readings please.

    I have a new ZDZ 50NG and I'm wondering what type of readings others are getting with this engine and other 50 class motors.
    I have about 7 1/2 gallons thru mine. The last 2 1/2 was Amsoil 100 to 1 premix that I mixed at 40:1. I was informed by a fellow flier that this should have only been mixed at 100:1 because it has added additives to be able to run at this low oil content.

    Anyways I'm turning a Menz s 22 x 10 at 6000 rpms. Seem really low to me, Thrust hp says I'm only getting about 24.5 static thrust.

  2. #2

    Join Date
    Apr 2002
    Location
    Locust Grove, GA
    Posts
    12,942
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    I am getting 7300 rpm on a Brison 3.2 and 21x8 NX propeller
    Aircraft Proving Grounds
    http://www.rcaircraft.net/
    Information on the building and flying of Radio Control Aircraft.
    Site for hobbyist in the R.C. Aircraft modeling world.

  3. #3
    zonker123's Avatar
    Join Date
    Apr 2003
    Location
    Grifton, NC
    Posts
    691
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    On my 50 NG:

    22-8 Bambula----6400 rpm
    21-8 Bambula (1/2 inch off each end of the first prop)---6900 rpm
    22-8 proZinger--- 7400 rpm

    got a Mens 22- 8 coming to try

    zonk
    Jet Central Super Bee, Rabbit 100, 2 Cheetah's and a Rhino.
    Team 2DogR/C

  4. #4

    Join Date
    Jan 2002
    Location
    Ponoka, AB,
    Posts
    298
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Hi,
    Menz 21x10 "S" @ 7100 rpm.

    +75 degrees F.....nice day.
    Amsoil series 2000 2-cycle mixed as recommended at 50-1.
    Unlimited on my 17 lb Sukhoi and some speed too!
    Bisson pitts muffler with the pinched ends cut off.
    I think I gained about 100 rpm from this mod.
    The high speed needle is tweaked to max rpm and the low speed needle is as lean as I can go and still maintain a decent transition.
    I do not like running rich......it fouls plugs, makes low power, makes carbon deposits, and can cause rings to stick/seize.
    Thanks
    John


    Hello,
    More 3.2 numbers
    Same equipment and gas.
    This time at an OAT of 35 degrees F giving me a density altitude of 1000 ASL.
    Beautiful December day!
    My previous numbers were at an OAT of 75 degrees F giving me a density altitude of 4000 ASL.
    Interesting how the power went up in the colder denser air and could not compensate for the extra power needed to move the prop through the denser air.

    Menz S 21x10 6800 rpm
    Menz S 22x10 6600
    Menz U 22x10 7200
    Menz U 23x10 6200
    Bambula 22x8 6400
    Bambula 22x10 5700
    Bambula 20x10 7300
    Thanks,
    John


    Hello,
    More 3.2 numbers
    Same equipment and gas.
    I removed the 5/8" exhaust pipes and soldered 1" pipes to the Bisson muffler.
    A little more noise...doesn't matter where we fly.
    200 rpm boost in power!
    I use Amsoil Series 2000 2-cycle racing oil mixed as directed at 50-1.
    This time at an OAT of 32 degrees F giving me a density altitude of 1500 ASL.
    Beautiful February day!
    Measured with a TNC tach.

    Menz 22x10 "S" 6800 RPM

    24 lbs thrust as measured with my spring scale known to be accurate in rough water weighing freshly caught fish!

    This is in my Sig Sukhoi that weighs 17 lbs.
    Nice performance!
    Thanks
    John


    Hi,
    May 2004.
    72 degree F day.
    Menz 22x10 "S" @ 6800 rpm....I get 7000 rpm when the engine isn't fully warmed up.
    I think I'm in the fat part of the torque curve!
    Nice engine.
    John

  5. #5
    zonker123's Avatar
    Join Date
    Apr 2003
    Location
    Grifton, NC
    Posts
    691
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Ok, good friend gave me a 22-8 Menz to try on the ZDZ 50 NG

    7200 rpm static

    16-1/4 lb DP edge

    the menz is head and shoulders the better prop for this plane compared to the others in my previous post, flew smoother, faster and pulled harder in the up lines. Also better control response at 3D settings, the plane locked in better in elevators and harriers, and high alpha knife edge was a lot easier. I have always know that props can change the characteristics of a plane but I was very pleased and surprised with the difference the Menz made on my set up

    zonk
    Jet Central Super Bee, Rabbit 100, 2 Cheetah's and a Rhino.
    Team 2DogR/C

  6. #6
    Swat Cop's Avatar
    Join Date
    Feb 2003
    Location
    Kissimmee, FL
    Posts
    910
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    I have a ZDZ 50 older version not the NG with about 1 gallon though it. I am getting 6100 RPM with a Zinger 22X8. My ZDZ 50 is also in a DP Edge 540.
    Kevin Lynch
    http://hometown.aol.com/bike466/index.html

  7. #7

    Join Date
    Dec 2002
    Location
    Vasteras, SWEDEN
    Posts
    13
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Gents,

    I tached my ZDZ 50RV (i.e. the slightly older version) today and got 6750 rpm with a Menz 22x8. The engine is muffled with a BCM wrap-around pitts.

    All the best,

    Fredrik

  8. #8
    Swat Cop's Avatar
    Join Date
    Feb 2003
    Location
    Kissimmee, FL
    Posts
    910
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Fredrik, what oil are you using? I have the same engine, I seem to be having a problem with oil dripping down on the spark plug after the first flight of the day and fouling the plug. I am using Pennsoil two cycle oil for air and water cooled engines mixed at 50:1. I am not having problems with carbon just oil, the electrode is a tan color.
    Kevin Lynch
    http://hometown.aol.com/bike466/index.html

  9. #9

    Join Date
    Dec 2002
    Location
    Vasteras, SWEDEN
    Posts
    13
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    I'm using premixed fuel intended for air cooled 2c engines from a local manufacturer named Aspen. They call it "environmental petrol" (alkylate petrol, the exhausts don't smell as bad as from normal petrol) including 2% synthetic, not specified, oil. They have some info in English on their web site, www.aspen.se. I have no noticeable oil residues on the spark plug and the engine runs flawlessly.

    Regards,

    Fredrik

  10. #10
    zonker123's Avatar
    Join Date
    Apr 2003
    Location
    Grifton, NC
    Posts
    691
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    OK here are a couple of more readings

    The same ZDZ 50 NG as in my previous posts on my DP Edge
    MSC 22x8----6700 RPM
    Nice prop, quiet, pulls nice at lower RPM and unlimited vertical-not as fast as the Menz but much better than the Prozinger Or Bambula

    Brisson 3.2 with about 30 hours of running i just aquired on a WH Extra Speical--17.5 pounds
    Mejzlik 22-8 Carbon Fibre----7200-7300 RPM, Unlimited vertical and very fast in an upline, even on the heavier plane!! Nice combo!
    MSC 22x8---6400 RPM quiet and nice pull at lower RPM , Vertical is unlimited, steady but not fast--now the weight and slightly less power than the ZDZ start to show. IMHO, just a bit too much prop on this heavier plane if you like to go straight up alot.

    Got a couple of 3W 22-8's coming and a Mejzlik 23-8, will let you know

    zonk
    Jet Central Super Bee, Rabbit 100, 2 Cheetah's and a Rhino.
    Team 2DogR/C

  11. #11

    Join Date
    Mar 2002
    Location
    Arvada, CO
    Posts
    7,726

    RE: 50cc Class readings please.

    54cc Poulan conversion with Ralph Cunninghams synchrospark ignition. 40:1 mix with 87octane gas.

    Pro zinger 22-8 was turning around 6600-6700RPM. Thats the only prop I ever tried in that size.

    Pro Zinger 20-10 was turning 7200RPM.

    All this at 6000' above sea level in Denver.
    Airplanes have expiration dates. Its just not printed anywhere on them.
    Im not really an airplane pilot; but I did stay at a Holiday Inn Express last night.

  12. #12
    SAL98's Avatar
    Join Date
    Jan 2002
    Location
    RIDGENew York
    Posts
    593
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Just in, I had to send my ZDZ 50 NG back to RC Showcase because of a cracked engine. they sent me out a new 50 ng and after the initial run up I wa pulling 6690 rpms using my same glowbee tach and a newley balanced MSC 22x8 prop.

    today i have about 2 gallons of penzoil mix through it and i'm getting 6900 rpms.

    Power is definitely much stronger than the other NG, the uplines are very fast and know I can hover down low (very short periods of time) and punch out with good authority.

    If the power gets any better i'll probaly start touching the tail on the Wild Hare Edge.

  13. #13

    Join Date
    Jul 2002
    Location
    Enterprise, AL
    Posts
    308
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    ZDZ 50 Ng 7280 rpm with a Zinger 22x8 and with less than 3 gallons of fuel used.

  14. #14
    SAL98's Avatar
    Join Date
    Jan 2002
    Location
    RIDGENew York
    Posts
    593
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Get rid of the Zinger and try an MSC, Menz, 3w or even a Mejlik. These props are twenty times better than the zingers simply because they are much much stiffer and have really good effieciency numbers. They cost about 5 bucks more (except for the Mejlik) but they are worth there weight in gold to a Zinger.

    Your rpm numbers will drop greatly but the overall thrust will drasticaly increase. You would would not believe how much of a difference a prop can make on these gassers.

  15. #15

    Join Date
    Jul 2002
    Location
    Enterprise, AL
    Posts
    308
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    If the prop pulled any better it would probably destroy my airplane, a 14.9 pound H9 CAP 232 and I am getting 27 pounds of static thrust when checked using a fish scale tied to the tail of the airplane. If I ever break the prop I will probably try some other brand.

  16. #16

    Join Date
    Nov 2003
    Location
    metropolis, ANTARCTICA
    Posts
    299
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    FWIW... 50cc gas class Taurus TS 52 3.2 cu.in. Stihl 50:1 new out of the box
    6010-6025rpm on a 24x8 menz s, 22x8 menz s 6960. will get better I suspect.

  17. #17

    Join Date
    Nov 2003
    Location
    metropolis, ANTARCTICA
    Posts
    299
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    follow up and the Taurus TS 52 & Menz22x8 still on 50:1 but Rs are up to 7200. will be changing to Amsoil soon.

  18. #18
    Adriano's Avatar
    Join Date
    Jul 2003
    Location
    Miami, FL
    Posts
    18
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    3W 48ib2 T.O.C. / Mejzlik 21x8 carbon / 80:1 Motul 800 mix with 100 octane gas = 8350 RPM

  19. #19

    Join Date
    Jul 2002
    Location
    Madisonville, TN
    Posts
    220
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    I posted this somewhere else, but its pretty impressive for a Chainsaw engine, Homelite 55cc out of a 330 Model Saw. I have 30 bucks and some fab time invested--Runs as well as my G-62, at least on the bench:

    Zinger 22x10------------------6800rpm
    Master Airscrew 20x10------- 7600rpm

    This is at 900ft elevation, about 50-55 degrees. Actual in the air trials will have to wait for warm weather--plan to install in a Giant scale (92"ws) BT-13.

  20. #20
    JoeAirPort's Avatar
    Join Date
    Aug 2003
    Location
    Milwaukee, WI
    Posts
    10,259
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    DA 50 w/ Bambula 22x8 prop. Brand new out of the box, factory carb settings (2 turns high, 1 7/8 low). 50 degrees F, 800 feet ASL.

    6800 RPM.

    Very rich, needs to be leaned out a few hundred. Bambula prop's have big paddles.
    Joe AP

  21. #21
    budgetdude's Avatar
    Join Date
    Oct 2002
    Location
    Burnsville, MN
    Posts
    844
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Brand new DA50, 1 gallon Of 32:1 lawnboy DA loudener, NX 22x8, factory needles, and bloody rich.

    7000

    Pulls my H9 Cap like the space shuttle.
    Andy Thomas

  22. #22
    Josey Wales's Avatar
    Join Date
    Jul 2003
    Location
    **, NJ
    Posts
    4,741
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    DA 50 Stock muffler..20 gallons..Amsoil 100:1
    NX 23-8 6900..needs to be leaned out some more

    Slimline Pitts
    MSC 22-8 7200
    Welcome to NJ...Where fun comes to die.
    Joe

  23. #23

    Join Date
    Jan 2002
    Location
    Riverton, WY
    Posts
    3,114
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Taurus 52, JA pitts, about 1gallon burned, Zinger pro 22x8...7500.... gotta get more prop.
    TKG
    Too much power is just about right.

  24. #24

    Join Date
    Oct 2002
    Location
    Alpine, CA
    Posts
    452
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Fuji Imvac BT-50 EI Gas:

    Mejzlik 22x8 almost 2 gallons with Amsoil at 50:1 -- 7100rpm solid

    I would have never bought this motor, I won it at a funfly, I must say at only 6-8 ounces more than the DA-50 RTF and over $150 less it rocks pretty well.
    Warren
    AMA 19909 - LSF 8170 LVL IV

  25. #25

    Join Date
    Jan 2002
    Location
    altoona, PA
    Posts
    239
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 50cc Class readings please.

    Craftsman 55 cc conversion motor ---- Topflight 22x6x10 @ 6400
    RC pilots are outstanding in the field !!


Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 04:03 PM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.