RE: Sundowner 50 Arf  
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RE: Sundowner 50 Arf - 1/23/2008 3:32:25 PM   
bob27s



Posts: 4831
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		There were a couple of you who PMed me about this thread and were building with SJ-50 or SJ-60LX installations. Anyone finish theirs yet ?


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RE: Sundowner 50 Arf - 1/23/2008 4:53:24 PM   
joshfneptune


 

Posts: 6
Joined: 4/10/2007
From: Prescott, AZ, USA
Status: offline 		The plane was a complete loss. I still haven't figured out what it was that caused the crash but my second one is almost done and ready to fly. Probably maiden it this afternoon. Hopefully the failure was an isolated incident. I already sent in the related radio gear into horizon to get checked out and put a new reciever and servos in. I'm also gonna try a flaperon mix since she did sink pretty quick on landing. Didn't tip stall, but a fast sink rate can be almost as ugly. We got a short runway with obstacles on either side where I fly so It's almost like you have dive at the runway to land! I'll let you know how it goes. If anyone else has tried this, let me know how sucessful it's been.

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RE: Sundowner 50 Arf - 1/23/2008 5:47:49 PM   
F4FWildcat


 

Posts: 9
Joined: 8/19/2006
From: Lewis Center, OH, USA
Status: offline 		Good luck. I'm very envious, gonna be a while till flying time here in frigid Ohio! Keep us all posted on how everything goes.

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       Post #: 28

RE: Sundowner 50 Arf - 1/23/2008 8:53:08 PM   
prophecypilot


 

Posts: 83
Joined: 3/1/2002
From: Kenly, NC,
Status: offline 		Got one of these last weekend and it is a nice looking plane. I had planned to squeeze a YS 91 on it but it is going to take a little re-engineering. To start with, the firewall will have to be moved back to accomodate the longer engine. Then I had thought about mounting the rudder and elevator servos in the rear of the fuse, and also the battery. Even if it balances without additional weight, do you think the airframe can stand the extra power? Thanks

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       Post #: 29

RE: Sundowner 50 Arf - 1/23/2008 11:54:46 PM   
patzane


 

Posts: 588
Joined: 11/11/2005
From: Glendale, AZ, USA
Status: offline 		I plan to use the same servos 475 on 6v


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RE: Sundowner 50 Arf - 1/24/2008 7:04:25 AM   
MicroDat


 

Posts: 226
Joined: 5/7/2007
From: studio city, CA, USA
Status: offline
quote:

ORIGINAL: prophecypilot

Got one of these last weekend and it is a nice looking plane. I had planned to squeeze a YS 91 on it but it is going to take a little re-engineering. To start with, the firewall will have to be moved back to accomodate the longer engine. Then I had thought about mounting the rudder and elevator servos in the rear of the fuse, and also the battery. Even if it balances without additional weight, do you think the airframe can stand the extra power? Thanks



I want to put a 110 on it if I get this plane. Sounds like a lot of work to move the firewall back. I rather just put the mixture box right against the firewall. Let us know how it goes, I'm very curious.

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       Post #: 31

RE: Sundowner 50 Arf - 1/24/2008 7:19:01 AM   
joshfneptune


 

Posts: 6
Joined: 4/10/2007
From: Prescott, AZ, USA
Status: offline 		After examining the wreckage of my first Sundowner 50, I believe the wings are sufficiently strong and the fuselage should also be sufficiently strong. I would replace the horizontal stab with a solid balsa or bass stab and glass it since you're already gonna need to add tail weight. I would also reinforce the firewall considerably.

Having said that, I would be weary of going with a 91 if you still plan on sport flying or having half a cowl left on the plane. I don't think the 91 will fit side mounted and you'll have to cut out a fairly larger portion of the cowl if you mount it inverted. At one point, I thought of putting a 110 on it, and I'm glad I didn't. Even with only a YS 63 on it, it comes in pretty hot. A 91 is heavier then a 110 and the sundowner wing doesn't really generate enough lift to support the added weight. It'll increase your stall speed quite a bit. There's no racing league for the sundowner near me so there's no need to make it that much of a break to land. I'll let you know how my Falperon config works when I test it tomorrow (Weather pending). If you do put a 91 in it, let me know how it goes.

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       Post #: 32

RE: Sundowner 50 Arf - 1/25/2008 1:29:35 AM   
planefixer


 

Posts: 5
Joined: 4/28/2007
From: Lafayette, IN, USA
Status: offline 		I have just finished assembling this aircraft. I put it together with a Saito .82 engine upfront. I used JR ST47 servos. According to Horizon Hobby, these will be sufficient. Just wondering if these servos will handle the load. I have these servos installed in 3 other models of the same size and a Aeromaster Biplane that is bigger and have not had a problem. I would hate to lose a 200 dollar model over a 10 dollar servo! Anyway I won't be flying this plane for a couple of months as I am waiting for the weather to clear up. I have an old beater for winter flying. No sense in tearing up the new plane landing on a rough, muddy, or frozen runway.

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RE: Sundowner 50 Arf - 1/28/2008 2:17:03 PM   
easton24


 

Posts: 349
Joined: 11/25/2004
From: STEDMAN, NC, USA
Status: offline 		I mounted the os 75 on last night. I didnt have much of a problem. I did have to notch out the top of the cowl where the head was making contact with the cowl. I also had to move the blindnuts out about 5mm out each.

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       Post #: 34

RE: Sundowner 50 Arf - 1/29/2008 2:57:23 AM   
patzane


 

Posts: 588
Joined: 11/11/2005
From: Glendale, AZ, USA
Status: offline 		easto24 how do you have the motor (side or inverted) Pay day for me is Friday so I will be putting one on order


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RE: Sundowner 50 Arf - 1/29/2008 3:14:37 AM   
easton24


 

Posts: 349
Joined: 11/25/2004
From: STEDMAN, NC, USA
Status: offline 		Side mounted.

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       Post #: 36

RE: Sundowner 50 Arf - 1/29/2008 3:39:15 AM   
prophecypilot


 

Posts: 83
Joined: 3/1/2002
From: Kenly, NC,
Status: offline 		I finally decided not to butcher the plane just yet to put in the 91. I decided to use a YS 63 I had. The plane flies great. It was a little breezy yesterday, but the plane cuts through it like a hot knife through butter. The balance was dead on with the 63. I only had a couple of props to experiment with, but I've got a 12-10 on order, that should pick up the top end a little. My buddy has a Spitfire that has been clocked at 110 and I was noticably faster when we were flying together. It does come in a little hot, so much heavier of an engine would probably make it a handfull to land. Good luck to all you guys about to try yours.

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       Post #: 37

RE: Sundowner 50 Arf - 1/29/2008 7:48:12 PM   
sti warrior


 

Posts: 7
Joined: 7/26/2007
From: Laredo, TX, USA
Status: offline 		well mine is almost done with a Jett .50BSE im waiting on my jett in-cowl muffler because the stock muffler doesnt fit ill post pics later

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       Post #: 38

RE: Sundowner 50 Arf - 1/29/2008 9:10:03 PM   
still4given



Posts: 463
Joined: 1/27/2006
From: Victorville, CA, USA
Status: offline 		Since some of you are using the YS 63 I thought this would be a good place to ask. How is the 63 for speed. I just acquired one and am trying to decide how to use it. Would it be competitive in a 40 size warbird? What size prop are folks using for speed?

Thanks, Terry
Revver Bro 180

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