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

NEW ZOOMER/WITH JET 50

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Old 07-15-2008, 11:22 PM
  #1
SACKRC
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Default NEW ZOOMER/WITH JET 50

GOT A ZOMMER TOGETHER WITH A JET 50 PUT A 8.8X8.5 APC FULL BLADE @ 19200.
1/4 OFF TIPS @ 20,000 RPM ON THE BENCH. WILL FLY IT WED. ALSO PUT THE EXHAUST TIMEING UP TO 170 (165 STOCK) USING 15% NITRO.. SEEM TO HAVE GOOD RESPONSE.
ANYONE HAVE AN OPINION ON WHATS BETTER, SPOILERS OR FLAPRONS OR NOTHING FOR THE BEST LANDING SITUATION. THANK RICH B.
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Old 07-15-2008, 11:40 PM
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Default RE: NEW ZOOMER/WITH JET 50

Zoom, Zoom, Zoom!
Sweet!
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Old 07-16-2008, 06:21 PM
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Default RE: NEW ZOOMER/WITH JET 50

The ailerons are well away from the wing tips, you may get away with flaperons. Try it way up high, worse case, slow & cross wind to see if it snaps easy.
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Old 07-17-2008, 11:40 AM
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Default RE: NEW ZOOMER/WITH JET 50

Looks nice.....

probably will not need flaperons.... but you can give it a try.

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Old 07-17-2008, 04:48 PM
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Default RE: NEW ZOOMER/WITH JET 50

SACKRC:

Had the identical setup except no grinding on the engine. (A crime punishable by death) except the 12% wing. No problems in landing except it takes a little longer than a Q-500 to slow down. Mine died by radio failure at flight 15 or so. I liked it. If concerned about landing speed, try flaporons first at altitude. Can always switch them out if you don't like how they work at altituude. Does not take much!!! ENJOY
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Old 07-18-2008, 08:11 AM
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Default RE: NEW ZOOMER/WITH JET 50

WENT UP WED. A LITTLE HARD TO TRIM.. AFTER 4 FLIGHTS IS WAS FINE. HAD SOME HEAD WIND UP THE FIELD SO LANDING WERE SHORT. ON A CALM DAY MIGHT NEED FLAPRONS , OTHER THEN THAT IT EXCELLENT. LAST ONE I HAD WITH A 40 JETT DID 16O. THIS ONE IS NOT MUCH FASTER IF ANY. MAYBE MORE NITRO! TRYED SOME FULL PIPES ON THE BENCH. RPM IS ABOUT THE SAME AS THE JETT MUFFLER. I GUESS ILL HAVE TO TRIM SOME WING OFF..... OR ANY IDEAS OUT THERE ON A HOT PIPE , USING AND MAC 40-50 PIPE NOT MUCH DIFF. IVE TRY 30 % HELI FUEL NOT WORTH THE EFFORT , ONLY 500 RPM INCREASE. EXHAUST AT 170 MAYBE UP TO 175.????
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Old 07-18-2008, 09:53 AM
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Default RE: NEW ZOOMER/WITH JET 50

get rid of the wheels and should pick up 15-20mph!!
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Old 07-18-2008, 09:54 AM
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Default RE: NEW ZOOMER/WITH JET 50

Try the macs 45 sized marine pipe. Its got a shorter mid section than the airplane pipe. It won't have as smoothe of a transition though.

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Old 07-18-2008, 11:28 AM
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Default RE: NEW ZOOMER/WITH JET 50

I VE GOT THE WHEELS, GOOD IDEA DIDNT THINK IT WOULD BE A BIG IMPROVMENT.
WILL TRY IT THIS WEEKEND.. I DO HAVE A MARINE PIPE WITH BETTER ANGLES I KNOW THE RANGE WILL BE LESS MIGHT GIVE IT A TRY.
WHATS MY POTENTIAL SPEED??
JUST SOME TIME AGO A GUY FROM P. R. HAD A PATRIOT DOING 170MPH.
HOW TRUE IS THIS???? MY WEIGH IS 4.5 LBS. AND LESS AIRFOIL SHOULD I DUE 180 TO 190, 200????
MY FIRST ZOOMER DID 160 WITH A 40 JET, AND NO LANDING GEAR.
JUST A GOOD HAND LAUNCH??
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Old 07-18-2008, 12:15 PM
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Default RE: NEW ZOOMER/WITH JET 50

Timing change is not going to help a great deal .... once you get to a point, airflow through the carb/crankshaft becomes the limiting factor on the engine. All a timing change is going to do is shift the torque curve a bit.

You noted an 8.8x8.5 approaching 20K rpm.... thats darn good in any book. I'd not expect much more.

You might want to try taking a 8.8x9.25 and clipping it down in diameter to 8.25" to get the rpm back.

In any case, it is very unlikely the aircraft is going to perform much over 160 mph.
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Old 07-18-2008, 01:46 PM
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Default RE: NEW ZOOMER/WITH JET 50

BOB 160MPH ,, WHATS WITH THAT 170MPH GR PLANES PATRIOT VIDEO???? TRUE/FALSE.
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Old 07-18-2008, 03:53 PM
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Default RE: NEW ZOOMER/WITH JET 50

HEY THER IS NO NEED TO YELL LOL, just kidding but thats a nice plane i hope you enfoy it. I would like to see some video though. Thanks

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Old 07-18-2008, 04:33 PM
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Default RE: NEW ZOOMER/WITH JET 50


Quote:
ORIGINAL: SACKRC

BOB 160MPH ,, WHATS WITH THAT 170MPH GR PLANES PATRIOT VIDEO???? TRUE/FALSE.
I'm not one to dispute anyone else's information. Any thing is possible.

In the case of the Rossi 53 powered Patriot I think the doppler speed measurements came up with basically the same info.

I only offer up information on my aircraft and a few others when I have confirmed in some fashion or someone has duplicated data. And from my own information I can sometimes offer estimates or projections for similar setups.

Keep in mind, full blown, current, competitive 428 Q-500 aircraft fly in the 170-175 range. QM40 tends to run around 185-190 now. Takes a great deal of attention to wing and airframe design, the right prop and a good load of power to get there.
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Old 07-18-2008, 05:11 PM
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Default RE: NEW ZOOMER/WITH JET 50


Quote:
ORIGINAL: SACKRC

BOB 160MPH ,, WHATS WITH THAT 170MPH GR PLANES PATRIOT VIDEO???? TRUE/FALSE.
The 170 mph speed was measured in a steep dive. In level flight it hit 135 mph.
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Old 07-19-2008, 05:16 PM
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Default RE: NEW ZOOMER/WITH JET 50


Quote:
ORIGINAL: SACKRC

I VE GOT THE WHEELS, GOOD IDEA DIDNT THINK IT WOULD BE A BIG IMPROVMENT.
WILL TRY IT THIS WEEKEND.. I DO HAVE A MARINE PIPE WITH BETTER ANGLES I KNOW THE RANGE WILL BE LESS MIGHT GIVE IT A TRY.
WHATS MY POTENTIAL SPEED??
JUST SOME TIME AGO A GUY FROM P. R. HAD A PATRIOT DOING 170MPH.
HOW TRUE IS THIS???? MY WEIGH IS 4.5 LBS. AND LESS AIRFOIL SHOULD I DUE 180 TO 190, 200????
MY FIRST ZOOMER DID 160 WITH A 40 JET, AND NO LANDING GEAR.
JUST A GOOD HAND LAUNCH??
Yo SackRC,

Please turn off the Caps Lock! It's harder to read caps and it is also a little bothersome, and it doesn't get the info across any better. Most forum users can't stand reading them.

Cheers,

MJD
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Old 07-06-2015, 12:45 PM
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Look Great!!!!
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Old 07-10-2015, 02:29 PM
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An 8 year bump. : o
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