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  1. #1826

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    RE: *** Ultra Sport Brotherhood ***

    Sorry,
    Yes I did build the model, I did the covering. I don't own any ARF's. I currently have ten planes that I built flyable, like an Aeromaster, a Simla, Bel Air .60 bipe, Robin Hood .25, Big Lazy Bee, Bristol M1, P.47, Brewster Buffalo, Something Extra, Stuka. I am working on a Faiery Fantome.
    Regarding the Spring Air retracts: I purchased them in 1980 for a Royal FW-190 that I have yet to build. There is no model number on them. They measure 3 5/16" x 1 1/8" x 1 1/2" with anodized gold frames, using 3/16" coiled struts that I bent up. The struts put the wheels as shown on the US60 plans.
    I hope that helps. BTW what Brotherhood number would I be?
    Thom
    Thom
    AMA #73928, Simla #4, Ultra Sport Brotherhood #138

  2. #1827

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    RE: *** Ultra Sport Brotherhood ***

    Thom,

    Someone will grab the next number and republish the list, or you can just read the thread backwards until you reach the most recent list and put the number in your signature, etc..


    ORIGINAL: thom25

    Sorry,
    Yes I did build the model, I did the covering. I don't own any ARF's. I currently have ten planes that I built flyable, like an Aeromaster, a Simla, Bel Air .60 bipe, Robin Hood .25, Big Lazy Bee, Bristol M1, P.47, Brewster Buffalo, Something Extra, Stuka. I am working on a Faiery Fantome.
    Regarding the Spring Air retracts: I purchased them in 1980 for a Royal FW-190 that I have yet to build. There is no model number on them. They measure 3 5/16" x 1 1/8" x 1 1/2" with anodized gold frames, using 3/16" coiled struts that I bent up. The struts put the wheels as shown on the US60 plans.
    I hope that helps. BTW what Brotherhood number would I be?
    Thom
    Rick
    Club Saito #725, Ultra Sport Brotherhood #104

  3. #1828

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    RE: *** Ultra Sport Brotherhood ***

    Thanks Thom I appreciate your info. Yeah go back to the last post I made and look for the last number issued and put the next number in your signature and I will then update the list and dont forget to message me that you got that number so I dont miss it like I have done before.
    Robert L. AMA #595312, Club Saito #724
    Ultra Sport Brotherhood #79, P-51 Mustang Brotherhood #22

  4. #1829
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    RE: *** Ultra Sport Brotherhood ***

    The most recent list is one page back and the next in line is 138
    KaP2011
    AMA #408493
    SPA #521
    Ultra Sport Brotherhood #110
    Spitfire Brotherhood # 193

  5. #1830

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    RE: *** Ultra Sport Brotherhood ***

    Robert,
    Thanks I am in.
    Ultra Sport Brotherhood #138
    Thom
    AMA #73928, Simla #4, Ultra Sport Brotherhood #138

  6. #1831

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    RE: *** Ultra Sport Brotherhood ***

    Your in thom25.

    1. Ken Isaac - RCKen
    2. Mike Buzzeo - Minnflyer
    3. Alex7403
    4. Dash008
    5. AH1G
    6. tschuy
    7. MILDBILL-RCU
    8. Box car
    9. Top Gunn
    10. SeaJay
    11. Crash Campbell
    12. SKYHI1
    13. ChuckW
    14. RhyanO
    15. landeck
    16. Ilikebipes
    17. airbusdrvr
    18. Insanemoondoggie
    19. daisy shoot
    20. prgonzalez
    21. BelAirBob
    22. hrrcflyer
    23. rastus1
    24. tony0707
    25. *JCB*
    26. Redback
    27. bigugly
    28. MetallicaJunkie
    29. Gordie M
    30. Jim_Purcha
    31. rcsws
    32. jeffsend
    33. fireman7875
    34. 72
    35. ser00
    36. Oly
    37. cpeisher
    38. donzhere
    39. SKYHI1
    40. kbarko
    41. pgilbert
    42. rambler53
    43. rcjets_63
    44. dschroeder
    45. Quikturn
    46. blueapplepaste
    47. green river rc
    48. SushiSeeker
    49. VCScott
    50. FallDownGoBoom
    51. ccp10
    52. Deadeye
    53. Eganwp
    54. carlosponti
    55. Navy18
    56. MineBurg
    57. Cdallas2
    58. loopyrc
    59. Sled
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    62. Bubba153
    63. Alfredbmor
    64. FentonFlyer
    65. Sneakywrist
    66. BLW
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    68. gabarber
    69. Amishwarlord
    70. JPMacG
    71. kamakazie frank
    72. RussianFlyer
    73. RoyR
    74. Red Jeepster
    75. Fallingleaf
    76. Yukonflier
    77. rcjim000
    78. goonybird1
    79. rglgatortail
    80. Latebreaker
    81. Tango juliet
    82. Saito18
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    84. RR24
    85. mechdrew
    86. siko_flyer
    87. Kit
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    90. JNorton
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    97. pt19 flyer
    98. Doug47
    99. b.bixel
    100! bikerbc
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    102. Mtthwacrss
    103. matadco
    104. rickbrad
    105. GaryHarris
    106. Roary m
    107. P47Tbolt
    108. jp boud
    109. arrdee
    110. KaP2011
    111. HFrank
    112. custombuiltrc
    113. jquid
    114. dasquirrelisme
    115. KC10Chief
    116. _Tommy D
    117. Do328jet
    118. sirzepp
    119. mrshea
    120. AJsToyz
    121. svenska3
    122. I FLY
    123. turnscrew
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    125. Super08
    126. ma_mulcahy
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    132. r/coldie
    133. Tubthumper
    134. JH313
    135. TWIN FLYER
    136. Fliegerboy
    137. Doug Robinson
    138. thom25
    Robert L. AMA #595312, Club Saito #724
    Ultra Sport Brotherhood #79, P-51 Mustang Brotherhood #22

  7. #1832

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    RE: *** Ultra Sport Brotherhood ***

    I think I can be a member now. I got a US40 in a trade. Liked is so much I got an old US1000.
    The 40 has an OS 40 w pipe & retracts. It is zooming at almost 100mph!
    The 1000 I fitted with a Magnum 180 four stroke. Still needs some tuning as it flies much slower than the little 40.

    COUNT ME IN

    Ed

  8. #1833

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    RE: *** Ultra Sport Brotherhood ***

    Yak13:

    Be aware that large airplanes appear to be flying slower than they actually are. With a clean airplane like the US1000, your airspeed in level flight will be just a couple of mph faster than static rpm times prop pitch. (Divided by 1000) So if your 180 will turn a 10 pitch prop at 9000 rpm on the ground, your US1000 will be doing a bit over 90 in the air.

    But speed is not everything. The higher pitch prop you use, the longer your takeoff runs will be and the weaker your vertical pull. I have found that a top speed of 75 - 80 mph is a compromise that gives you good speed and still allows BIG loops and high stall turns.

    Jim

  9. #1834
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    RE: *** Ultra Sport Brotherhood ***


    ORIGINAL: jrf

    Yak13:

    Be aware that large airplanes appear to be flying slower than they actually are. With a clean airplane like the US1000, your airspeed in level flight will be just a couple of mph faster than static rpm times prop pitch. (Divided by 1000) So if your 180 will turn a 10 pitch prop at 9000 rpm on the ground, your US1000 will be doing a bit over 90 in the air.

    But speed is not everything. The higher pitch prop you use, the longer your takeoff runs will be and the weaker your vertical pull. I have found that a top speed of 75 - 80 mph is a compromise that gives you good speed and still allows BIG loops and high stall turns.

    Jim
    Hi Jim,

    Let me see what I can reason out of your statement.
    Let us assume that "doing a bit over 90 in the air" is 92 mph.

    Let us convert 92 mph to inches ___we have 92 x 5280 (feet per mile) x 12 (inches per foot) = 5,829,120 inches per hour.

    That means 5,829,120 dvide by 60 minutes in an hour gives us 97,152 inches per minute.

    At 9,000 rpm each rpm would correspond to a forward movement of 10.79 inches.

    The way I see that is the propeller is pulling the model at 92 mph with a negative angle of attack of the prop blades.

    Now I can believe in miracles or I do not know simple maths.

    Zor

  10. #1835

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    RE: *** Ultra Sport Brotherhood ***

    Zor:

    I am neither a scientist nor a mathematician, but I can assure you that "rule of thumb" is very close to reality. The answers it provides match several published nemonics and have been verified by myself and others many times by radar gun.

    Perhaps the math is not as simple as you assume. You might want to consider the fact that the prop will unload in the air.

    Jim

  11. #1836

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    RE: *** Ultra Sport Brotherhood ***

    Zor, remember that the prop unwinds in the air, i.e. RPM increases. The increase in RPM can be anywhere from 500 to 1,500 or more RPM. The resulting RPM will be more than what a straight pitch/RPM needed for 92 MPH because of inefficiencies in the prop.
    Bruce L. AMA# 54227
    Ultra Sport Brotherhood #15

  12. #1837
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    RE: *** Ultra Sport Brotherhood ***


    ORIGINAL: jrf

    Zor:

    I am neither a scientist nor a mathematician, but I can assure you that "rule of thumb" is very close to reality. The answers it provides match several published nemonics and have been verified by myself and others many times by radar gun.

    Perhaps the math is not as simple as you assume. You might want to consider the fact that the prop will unload in the air.

    Jim
    Hi Jim,

    Yes I know that a prop unloads in the air but I do not know by how many rpm and even that will vary with the speed.

    You no doubt noticed I used 92 because you had written "a coupleof mph faster".

    I made the calculations just for the fun of figuring things out .

    Props diameters and pitch are selected to load the engine to its constant rated horsepower and result in its best (highest) thrust to torque ratio. That determines the angle of attack for a fixed pitch prop.

    In different words ___With a specific engine capable of delivering a maximum constant horsepower installed on a specific airplane the resulting cruising speed should result with an angle of attack of the prop blades that has the best thrust and a minimum torque requirement.

    It is sometime referred to as the prop having best efficiency.

    I am just trying to explain my understanding.

    I can see things better in my mind than I can convert it into written text.

    Zor

  13. #1838
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    RE: *** Ultra Sport Brotherhood ***


    ORIGINAL: landeck

    Zor, remember that the prop unwinds in the air, i.e. RPM increases. The increase in RPM can be anywhere from 500 to 1,500 or more RPM. The resulting RPM will be more than what a straight pitch/RPM needed for 92 MPH because of inefficiencies in the prop.
    Yes landeck,

    It would be interesting to have some postings from fellows with telemetry and an rpm feedback.

    Zor



  14. #1839

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    RE: *** Ultra Sport Brotherhood ***

    Zor, I agree.

    Bruce
    Bruce L. AMA# 54227
    Ultra Sport Brotherhood #15

  15. #1840

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    RE: *** Ultra Sport Brotherhood ***

    Hey Guys,

    Back into the brotherhood with my new US60 / OS75AX all finished as per pics below. Sorry about the photo quality, I just used my phone camera

    Cheers

    Gordie
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    Ultrasport brotherhood #29

  16. #1841

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    RE: *** Ultra Sport Brotherhood ***

    Very nice, thats a real good looking plane, good job.
    Ken
    Wherever conversion engines are outlawed, only outlaws will have conversion engines.

    ULTA SPORT BROTHERHOOD #8

  17. #1842

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    RE: *** Ultra Sport Brotherhood ***

    Very good looking plane. What prop are you using with the OS 75 AX?

    Bruce
    Bruce L. AMA# 54227
    Ultra Sport Brotherhood #15

  18. #1843
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    RE: *** Ultra Sport Brotherhood ***

    ORIGINAL: Gordie M

    Hey Guys,

    Back into the brotherhood with my new US60 / OS75AX all finished as per pics below. Sorry about the photo quality, I just used my phone camera

    Cheers

    Gordie
    What is your AUW and how does it fly with the .75? It looks really good.

    Mine is very near completion but I keep setting it aside because I can't decide on an engine. This week I'm leaning toward a Saito 1.00. I have went from an OS .75AX to an OS .95AX to an OS FS95 to a Super Tigre G90. I just can't decide. I want to have very good verticle. I would like to have a 1 to 1 power ratio, or maybe a little more. I traded the Super Tigre off so it's out of the picture. I already have the Saito 1.00, but I'm going to buy a new engine before the end of Sept. (even if I don't need it)so I have to decide soon.

    What are the suggestions from the gallery?

    KaP2011
    AMA #408493
    SPA #521
    Ultra Sport Brotherhood #110
    Spitfire Brotherhood # 193

  19. #1844

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    RE: *** Ultra Sport Brotherhood ***

    looks amazing Gordie!

    I think Im pretty good with monocoat, but always have a problem comming up with a scheme.

    Yours is amazing!

    Bill S.
    Carl Goldberg Ultimate Brotherhood #56
    Goldberg Tiger Club #17
    SIG Brotherhood #69

    Ultra Sport Brotherhood #135
    http://radiocontrolhobbies.freeservers.com

  20. #1845

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    RE: *** Ultra Sport Brotherhood ***


    ORIGINAL: Twin_Flyer

    looks amazing Gordie!

    Bill S.
    Hello Gordie,

    I have to agree with Twin Flier. That is one of the best looking Ultrasport's I've seen........

    David
    Fly Safe and Have Fun ! ! !
    Ultra Sport Brotherhood #22

  21. #1846
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    RE: *** Ultra Sport Brotherhood ***

    Nice!!!
    Going Ballistic
    WATCH THIS!.............oops.
    AMA 405143

  22. #1847

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    RE: *** Ultra Sport Brotherhood ***

    Hi KaP2011 ,
    I have an US60.(See post #1819 and 1822) I am running an OS .75AX with an APC 14X8 prop, Omega 15%. Lots of speed and vertical. Try it you will like it.
    Thom
    Thom
    AMA #73928, Simla #4, Ultra Sport Brotherhood #138

  23. #1848

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    RE: *** Ultra Sport Brotherhood ***

    Thanks for the nice comments guys!

    AUW is around 8lbs. Based on my previous US with same engine I anticipated nose heavy, so moved the servos back a bit during the build, bought a macs muffler and planned a wood prop. Wouldn't you know it, tail heavy in that configuration!!! So back to stock muffler and APC prop - it balanced perfectly. I know I could strip 5ozs out by moving the battery forward and going back to macs + wood prop. It's also over-servoed with high torque digi's at 2.2oz each, so there is 2+ozs weight saving there if you use more appropreiate sized servos.

    Mods are fully sheeted wings + twin aileron servos mountedunder hatches in each wing.

    Prop: 13x6 or 13x7. I tried the 14 inch props on the previous US / 75AX. Personally I think thats too much prop for the 75AX and causes a vibration in the mid range.. The US is not overly fast in level flight with a 13x6 but the thick wing doesn't help straight line speed anyway. Vertical isout of sight upon the other hand....

    Covering is Ultracote: Orange (its a bit see-thru) + Pearl White (really hard to use - almost as bad as Silver) + Carbon fibre black + Silver and Pearl Blue stripes.

    Will take some more pics using a good camera the carbon fibre black looks really cool close up

    Cheers,

    Gordie
    Ultrasport brotherhood #29

  24. #1849
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    RE: *** Ultra Sport Brotherhood ***

    ORIGINAL: Gordie M

    Thanks for the nice comments guys!

    AUW is around 8lbs. Based on my previous US with same engine I anticipated nose heavy, so moved the servos back a bit during the build, bought a macs muffler and planned a wood prop. Wouldn't you know it, tail heavy in that configuration!!! So back to stock muffler and APC prop - it balanced perfectly. I know I could strip 5ozs out by moving the battery forward and going back to macs + wood prop. It's also over-servoed with high torque digi's at 2.2oz each, so there is 2+ozs weight saving there if you use more appropreiate sized servos.

    Mods are fully sheeted wings + twin aileron servos mountedunder hatches in each wing.

    Prop: 13x6 or 13x7. I tried the 14 inch props on the previous US / 75AX. Personally I think thats too much prop for the 75AX and causes a vibration in the mid range.. The US is not overly fast in level flight with a 13x6 but the thick wing doesn't help straight line speed anyway. Vertical isout of sight upon the other hand....

    Covering is Ultracote: Orange (its a bit see-thru) + Pearl White (really hard to use - almost as bad as Silver) + Carbon fibre black + Silver and Pearl Blue stripes.

    Will take some more pics using a good camera the carbon fibre black looks really cool close up

    Cheers,

    Gordie
    Thanks for the info Gordie. I expect mine will come in close to that weight as well as I've done all the Minnflyer mods. plus adding eflite retracts. I've got an Extra 300 that weights 7.5# with a Tower .75 on it and I'm not too impressed with the Tower engine just yet. I believe it is just getting to the fully broken in stage so it may get better.

    If anyone could educate me on how to figure the power to weight ratio I would be greatfull.
    KaP2011
    AMA #408493
    SPA #521
    Ultra Sport Brotherhood #110
    Spitfire Brotherhood # 193

  25. #1850
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    RE: *** Ultra Sport Brotherhood ***


    ORIGINAL: KaP2011
    >
    >
    >
    >
    If anyone could educate me on how to figure the power to weight ratio I would be greatfull.
    Divide the weight into the power.

    Examples ___

    Power 1 HP
    Weight 1 lb
    Ratio is 1 HP per lb.

    Power 3 HP
    Weight 8 lbs
    Ratio 3 divide by 8 is 0.375 which is 3/8 of a horse power per pound of weight.

    Zor


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