Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Sundowner 50

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Old 11-12-2012, 10:26 AM
  #1
AdamPrime
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Default Sundowner 50

Hello I have a sundowner 50 with an os 55 ax trying to find the right prop for this combination. I am looking to get as high as a speed as I can. I was thinking of something like a 10x8 10x9. Any suggestions? Adam
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Old 11-12-2012, 12:24 PM
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Default RE: Sundowner 50

I would probably start with a 10x7 or a 10x8. Do not over prop it and bog the engine down.
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Old 11-12-2012, 01:04 PM
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AdamPrime
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Default RE: Sundowner 50

I was running a 10x8 with a 46ax. I was thinking of going up 1 in either pitch or diameter. I was leaning toward a 10x9
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Old 11-13-2012, 07:30 AM
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Default RE: Sundowner 50

The 55 turns a 10 x 9 well (over 14k) with the Jett pipe.
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Old 11-13-2012, 07:42 AM
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Default RE: Sundowner 50


Quote:
ORIGINAL: AdamPrime

Hello I have a sundowner 50 with an os 55 ax trying to find the right prop for this combination. I am looking to get as high as a speed as I can. I was thinking of something like a 10x8 10x9. Any suggestions? Adam
Yup - those are good choices, try them both.
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Old 11-13-2012, 06:47 PM
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Default RE: Sundowner 50

http://www.caldwellaeromodelers.com/speedrally.asp

Click on the link above. I think there is some info from this year and last year's event that will interest you.
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Old 11-13-2012, 07:48 PM
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Default RE: Sundowner 50


Quote:
ORIGINAL: vicman

http://www.caldwellaeromodelers.com/speedrally.asp

Click on the link above. I think there is some info from this year and last year's event that will interest you.
Vic, it's very cool to be able to see all the real world results that you recorded and all of the different ways that modelers went to get those results.
You guys had some really busy days since this event first began that will be great memories to last a lifetime.
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Old 11-13-2012, 08:59 PM
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Default RE: Sundowner 50

Yep, all we need now is to get you out here to see what you got. I would love to hand you a 250 sticker.
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Old 11-17-2012, 09:20 AM
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Default RE: Sundowner 50

250 mph or 250 Kph, either way .....highly unlikely
Might be better sticking that 55 in a viper 500 to get some speed.....?
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Old 11-17-2012, 11:25 AM
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Default RE: Sundowner 50

What??
Did someone post something wrong?
I didn't see anyone talking about 250 anything...
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Old 11-17-2012, 01:40 PM
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Default RE: Sundowner 50


Quote:
ORIGINAL: vicman

Yep, all we need now is to get you out here to see what you got. I would love to hand you a 250 sticker.
he was referring to your reply to combatpigg
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Old 11-17-2012, 01:54 PM
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Default RE: Sundowner 50

Wow, a little chip on someone's shoulder.
FWIW I haven't given anyone a 250 sticker...ever. And only one guy ever hit 225 with only two breaking 200.

My link to the rally results was merely for the op to look up his exact set-up since George S has brought one two years running and give emperical data.
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Old 11-23-2012, 06:32 PM
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Default RE: Sundowner 50

Is it kosher to fly straight down at the guy with the radar gun? Or does the pass have to be more or less level..?
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Old 11-23-2012, 09:35 PM
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Default RE: Sundowner 50

The Rally is just that... Run whatcha brung and go as fast as you feel comfortable bragging about.
If you want a level pass great, if you like a little dive action? Thats great too.

The radar gun operator stands behind the pilot. His thinking is that the pilot isn't going to hit himself.
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Old 11-24-2012, 06:24 AM
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Default RE: Sundowner 50


Quote:
ORIGINAL: vicman


The radar gun operator stands behind the pilot. His thinking is that the pilot isn't going to hit himself.
"Famous last words"
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Old 11-24-2012, 10:16 AM
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Default RE: Sundowner 50

Other than 35 years ago clipping myself with a .15 flying wing, the closest I have come to that is with my Magnum R.. kinds forgot about the closing speed as I flew it towards myself in a shallow dive at full tilt.

Standing behind the pilot is always the safest choice. Even if he hits himself, human shields are quite effective.
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Old 11-24-2012, 11:10 AM
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Default RE: Sundowner 50

Was flying PBF combat with 2 other flyers earlier this spring. One whom I trusted and the other guy was fairly new to combat flying.

We were standing close to each other, approximately 1 ft. between each of us and the in-experienced pilot lost control of his pbf (powered by a .40 supertiger I believe) and "Knife edged"it between myself and the other flyer at full throttle !!! Don't see how he could of not have hit any of us as we too thought standing close we would stay away from each other. PBF went into the pits area and just missed other planes in the pits. Needlessly to say, the pilot was horrified with what he had just done and could not fly anymore that day, thinking about "What" could have happened. All I remember was a blur going past me. Would not want to know what "could have happened" had it hit one of us square on. Sometimes God is looking out after us !!!
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Old 11-24-2012, 09:58 PM
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Default RE: Sundowner 50

O.P. :
Run an APC 10X9 with a tuned red Jet muffler or tuned pipe. Id stay away from 10X8, 30% and cooler plug on the 55, it will make more power, but it takes a toll on engine life. Expensive fuel consumption goes up, flight time goes down, just not worth it unless you are racing.
Even so the bearings will go south. When the get "gritty" replace them with the stainless bearing kit from only from RC Bearings. Their rear bearing is the only one on the market that's stainless + plastic retainer and it makes a difference in my opinion. I believe the front bearing in the kit is steel, but front's never seem to go bad, so go ahead and use it with confidence.
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