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    Overview - 7/23/2003 6:52:10 AM   
    Countryboy



    Posts: 1510
    Joined: 12/17/2001
    From: Lawrenceburg, KY, USA
    Status: offline     		Pic showing overview of the 622 layed out on the wing.

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    (in reply to 48chebbie)
           Post #: 101

    Overview #2 - 7/23/2003 7:00:55 AM   
    Countryboy



    Posts: 1510
    Joined: 12/17/2001
    From: Lawrenceburg, KY, USA
    Status: offline     		Pic showing the Centurion layed out.

    With the proper strut length, I think the Centurion in an 85 degree would be a good choice for retrofit. Also the Robart 531 would be a good choice.

    Don't take offense Kyle2Baseball, just pointing out what might have of been a mistake in your Robart # selection. If I'm wrong, the flame suit is on.

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    (in reply to 48chebbie)
           Post #: 102

    Hangar 9 150 Size P-51 - 7/23/2003 8:13:43 AM   
    Kyle2Baseball



    Posts: 147
    Joined: 6/13/2002
    From: Kissimmee, FL, USA
    Status: offline     		Hey Countryboy,
    Wouldn't you know it, I called Horizon Hobbies tech support and they told me the 622'S would be a direct replacement.
    Go figure
    Thanks for your feed back.

    _____________________________

    I hate Florida Weather
    I want to fly more

    (in reply to 48chebbie)
           Post #: 103

    Hangar 9 150 Size P-51 - 7/23/2003 8:15:07 PM   
    mulligan



    Posts: 1147
    Joined: 4/14/2002
    From: Sanford, FL, USA
    Status: offline     		Countryboy,

    It appears the Robart 531s rotate away from actuator; the 551s rotate towards the actuator, thus they seem to be a better choice if they can clear the gear bay. What's your opinion?

    Also, I'm looking at Robart straight struts 660s as opposed to 650s for length- you agree?

    Finally, does anyone know how those gear door mounting brackets (e.g., #660DB) attach to the door?

    Thanks,
    George

    < Message edited by mulligan-RCU -- Jul 23 2003 3:33PM >

    (in reply to 48chebbie)
           Post #: 104

    Hangar 9 150 Size P-51 - 7/23/2003 9:59:49 PM   
    Countryboy



    Posts: 1510
    Joined: 12/17/2001
    From: Lawrenceburg, KY, USA
    Status: offline     		[QUOTE]Originally posted by mulligan
    Countryboy,

    It appears the Robart 531s rotate away from actuator; the 551s rotate towards the actuator, thus they seem to be a better choice if they can clear the gear bay. What's your opinion?

    George,

    You are correct.... the 551 series would be the better choice. After going back and reviewing Robarts site, I see that the 531 retraction angle is measured from the opposite end of the actuator. Nice catch!!!

    Also, I'm looking at Robart straight struts 660s as opposed to 650s for length- you agree?

    If you choose to go with the straight leg strut, the 660 would be the way to go. The 650's appear to be too light duty also. My personal preference on the strut would be to go with the offset yoke in that series. If you are going to go through the expense.... might as well get the look to go with it. Also, one might have to do some trimming of the wheel well to clear the scissor links.

    Finally, does anyone know how those gear door mounting brackets (e.g., #660DB) attach to the door?

    Can't answer this one for sure, as I have never used them. Have an idea as to how they attach, but without seeing them first hand, can't say for certain.

    Thanks,
    George     [/QUOTE]

    (in reply to 48chebbie)
           Post #: 105

    Hangar 9 150 Size P-51 - 7/23/2003 10:30:08 PM   
    mulligan



    Posts: 1147
    Joined: 4/14/2002
    From: Sanford, FL, USA
    Status: offline     		Hmmmm, the offset yolk would look better when down, but since the retracts only retract 85 deg., I thought the wheel would not be fully in the bay, and the door would not close fully.

    If you look at the geometry of the 622 (even though it's not a possibility), it actually retracts 90 deg., (85 deg. from down position + 5 deg. extra). Strut is not flush with wing, giving extra room for an offset yolk and wheel to fit in bay.

    What to do, what to do?

    - George

    (in reply to 48chebbie)
           Post #: 106

    New Robart Gear for H9 Mustang 150 - 7/23/2003 10:44:14 PM   
    NoGuts_NoGlory



    Posts: 130
    Joined: 1/3/2002
    From: North Palm Beach, FL, USA
    Status: offline     		A very reliable source said that Robart is currently working on a set of retracts specifically for this plane. When will they be ready? - "soon".
    Howard

    (in reply to 48chebbie)
           Post #: 107

    Hangar 9 150 Size P-51 - 7/24/2003 12:49:31 AM   
    mulligan



    Posts: 1147
    Joined: 4/14/2002
    From: Sanford, FL, USA
    Status: offline     		Crap. That puts me in a quandry.

    Thanks for the news, though, Howard.



    I was also toying with the idea of getting the 550 90 deg. retracts with 662RL offset yolk struts and mounting at a 5 deg. tilt inside the wing. Gear down would be 85 deg. and the gear up would be 5 deg. into the wing, which would keep everything inside the wing. That would require some gear bay mods, but really anything you do would require some mod.

    - George

    (in reply to 48chebbie)
           Post #: 108

    Hangar 9 150 Size P-51 - 7/24/2003 5:10:59 AM   
    Countryboy



    Posts: 1510
    Joined: 12/17/2001
    From: Lawrenceburg, KY, USA
    Status: offline     		[QUOTE]Originally posted by mulligan
    Hmmmm, the offset yolk would look better when down, but since the retracts only retract 85 deg., I thought the wheel would not be fully in the bay, and the door would not close fully.

    George,

    If the wing had no dihedral, life would be simpler. Such is not the case though. If you go back & look at the 551 diagram, you will see that in the fully retracted position, that the strut remains at 90 deg. to the actuator/ pivot point. From this point, the strut will only swing through an 85 deg. arch.
    The relative angle between the retract mounting rails & the wheel bay does not change. Now picture the retract mounted in the wing.... in this case the 551 diagram as shown on Robart's site. Now visualize that retract mounted in the left wing panel "Viewed from Trailing Edge" with the wing panel blocked up to have the correct dihedral, and tell me what you see.

    The way I view it, that will put the wheel at, or close, to 90 deg. to earth when in the extended position, and should not affect the retraction angle. The retract, even though the wing has dihedral, will still be at 90 deg. to the wing.
    Does your head hurt.... mine sure does.

    If you look at the geometry of the 622 (even though it's not a possibility), it actually retracts 90 deg., (85 deg. from down position + 5 deg. extra). Strut is not flush with wing, giving extra room for an offset yolk and wheel to fit in bay.

    The 622-5 retract for the T/F 1/5 Mustang has problems in it's own right. That extra 5 deg. causes problems in mounting geometry also. I haven't seen one of these yet, that when sitting on the ground.... did not look like a new born Colt trying to stand for the first time.

    What to do, what to do?

    You tell me!!!

    - George     [/QUOTE]

    (in reply to 48chebbie)
           Post #: 109

    Hangar 9 150 Size P-51 - 7/24/2003 6:28:19 AM   
    rc34074


     

    Posts: 857
    Joined: 3/30/2002
    From: lexington, OH, USA
    Status: offline     		why not look at the spring air 400 series retracts? they would fit much easier than the robart 622s and they are strong gear-at least as strong as the robart 622 retracts. [url]www.retracts.com[/url]

    ed

    _____________________________

    "there are fighters and there are targets"

    (in reply to 48chebbie)
           Post #: 110

    Hangar 9 150 Size P-51 - 7/24/2003 6:41:30 AM   
    mulligan



    Posts: 1147
    Joined: 4/14/2002
    From: Sanford, FL, USA
    Status: offline     		This is what I was thinking about...


    - George

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    (in reply to 48chebbie)
           Post #: 111

    P51 Gas - 7/31/2003 7:19:26 PM   
    Stagwing


     

    Posts: 8
    Joined: 2/12/2003
    From: Greenville, SC, USA
    Status: offline     		I'm putting a G23 in mine. I have wanted to move up to gas for a while and I happen to have a new G23 just sittin there begging to be used. I'll let you know how it works out. I have access to some pretty good modelers around here so brain storming the installation should not be that much of a problem. If anyone else out there has already used a G23 or G26 send pictures of your setup. Dan

    _____________________________

    dwt

    (in reply to 48chebbie)
           Post #: 112

    price??? - 8/1/2003 11:13:28 PM   
    yard-dart



    Posts: 927
    Joined: 3/6/2002
    From: West Monroe, LA, USA
    Status: offline     		I'm kinda like P-51B, this plane seems to be a little pricey. I've put some numbers together on what it would take to complete this plane:

    $500.00 Plane
    $400.00 Engine
    $250.00 Servos
    $50.00 Spinner

    $1200.00 Minimum

    Now I don't mean to sound like a tight-ass, but this seems a little much. I know that all of these items are mandatory, but $500.00 for a plane that's not even considered a big bird is a little overkill.
    I've got the 1/4 scale Pacific Aeromodels Laser, which is a big bird with a gasser, and I only have around $900.00 in it. I am aware that there is no comparison between it and the mustang, but still, a plane is a plane. The quality of my laser is great, so quality is no longer an issue. All planes "should" be of good quality anyway.
    I am no tightwad when it comes to planes, my wife will tell you that, but I just think this 'stang is a little to harsh on the pocketbook. I think $399.00 is about the "max" that should be charged for this bird. I think I'll wait for the price to come down a little before I purchase it, and I'm quite sure it will come down.

    John

    (in reply to 48chebbie)
           Post #: 113

    Hangar 9 150 Size P-51 - 8/2/2003 12:43:22 AM   
    P-51B



    Posts: 6173
    Joined: 10/11/2002
    From: An Iceburg in, ANTARCTICA
    Status: offline     		Yard-Dart,

    I was able to get one at my LHS for $370.00. I also called Doug's hobby shop in Waldorf, MD., they had them for either $390 or $370 (I can't remember which). You can find their advert in RCM.

    I already have a saito 180 (...unless I decide to go gas) and radio gear. I will have to get a spinner for it though.

    _____________________________

    In order to think "outside the box", one must first accept there IS a box.

    (in reply to 48chebbie)
           Post #: 114

    Retracts - 8/2/2003 2:53:12 AM   
    airspeed917



    Posts: 64
    Joined: 12/9/2001
    From: NY
    Status: offline     		I have been talking with Robart,, They got themselves the wing for this plane and figured out the best pair of retracts for it. Here is what I was Told. This is the actual reply.

    Ron:
    The powers that be have decided the Robart 551RS 85 deg Retract mechanisms will work, but this means converting to a pneumatic system rather than mechanical. They also suggest the 660 Robostruts with a 3-1/4 wheel. There will not be any major modifications to the wing with these suggestions. Hope this helps.
    Sincerely
    Gary Ernst
    Robart Mfg.

    (in reply to 48chebbie)