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

WANTED---DD Tips

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Old 03-16-2003, 03:56 AM
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BullardRM
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Default WANTED---DD Tips

I am almost ready to try my first DD. I am using a Jett 50 RE with a pipe (awesome engine). Please share your experiences and advice on launching this tiger and what to expect. Any info to help settle my nerves would be GREATLY appreciated.
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Old 03-16-2003, 04:15 AM
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Bob Payne
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Default WANTED---DD Tips

I hold mine between the elevons tilted up a bit and rev
it up and just let go, no shove or anything and mine
currently only has an os la46,
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Old 03-16-2003, 04:28 AM
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jlong34016
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Default os 46 la

what is your total weight and what prop are you running? Mine has ys 45 is 3# 10 oz and 9x7 prop and it takes a run and toss to get it up.
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Old 03-16-2003, 04:46 AM
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Kaos1
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Default WANTED---DD Tips

BullardRM,
When I was flying my duster, it had a Picco 45 and a 9X7 prop turning 16K static. It probably unloaded another 2500 in the air as it came on the pipe. I would usually have a person hold it by each wing tip, pointed about 10 degrees nose up and 10 degrees to the right (right wing low) to counter act the torque of the engine. Of course facing into the wind, though it really didn't matter with that much thrust. Throttle up to full and let go for the time of your life! In the first second the plane would already be out 150 feet. Be ready for some wild wing rocking on the first and every flight. Take offs were always exciting. And it just got better from there.

My duster came in at 2.25 pounds w/o fuel. 6oz. tank.

The saddest day of my life is the day I sold it. I envy your new venture.

Kaos1
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Old 03-16-2003, 08:28 PM
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Default Launching

Bullard,

Read my comments and see photos on the "Diamond Dust Engine Selection" post.
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Old 03-18-2003, 01:52 AM
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jlouden
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Default WANTED---DD Tips

Make sure you set up plenty of expo on the elevons. 50 to 75 percent is not unheard of. For a first flight, do not go to full power for the launch. Bring your throttle up slowly and when your holder can feel the plane pulling strongly leave the throttle there and launch. You can also use a flatter prop to keep your top speed down until you get the hang of it.

Good Luck

John
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Old 03-18-2003, 02:05 PM
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Default Launching

Bullard,

If you look at my launch photo you can see that with the Jett FIRE 50 it pulls so strongly there is virtually no torque roll. Notice also that it does not descend at all, it flies straight out at the same angle I launch it. I release it at full throttle with the controls at neutral. Because it hits flying speed almost instantly you really don't have to worry about torque with that engine.

Expo is a personal preference thing. Some guys love it but I use very little. I don't care much for the non-linear nature of expo. Instead of gobs of expo I tend to use less throw on my elevons. You will have to decide what works best for you.
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