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

MY ENTRY FOR N. C. SPEED MEET

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Old 06-11-2009, 05:19 PM
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SACKRC
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Default MY ENTRY FOR N. C. SPEED MEET

Got a AJ2 by matney hob. with and jet 50, Running a 7.4 x 8 prop. at 23,500 on the ground. Will be triming it out next week.. If all goes well it will be in N. C. on the 27th. The motor is running strong, been bench runing it for a break in. Got a freind with a 40 nelson cant seem to pull the prop to more than 19,000. Im suprised though it was good for 24,000 at the pylon events.
Any input on the nelson? Any projection on my possible speed?

Hey vicman will call you got some questions. Spoke toyou a couple a months ago. Rich Barile from N. York
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Old 06-11-2009, 07:25 PM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

SRC, that's a BAD****! Pretty, too.

Just like some "baked potatoes" I know have had 1 too many shots of booze or 1 too many bong hits in their life time, your Nelson might have had 1 too many happy runs. Could be bearings going bad.
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Old 06-11-2009, 07:58 PM
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daven
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Default RE: MY ENTRY FOR N. C. SPEED MEET

Was it a Q40 nelson or Q500 nelson? They are timed differently.
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Old 06-11-2009, 08:28 PM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

The pitch speed of an 8" pitch prop at 23,500 is 178 mph. Chances are you have the horsepower to drag it along at that clip, and it may unload some too. You might have yerself a 180 ship there.

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Old 06-12-2009, 09:14 AM
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daven
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A 7.4x8 on a SS Nelson Q40 should turn a minimum of 22k if its not, something is wrong.
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Old 06-13-2009, 08:20 AM
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Default RE: MY ENTRY FOR N. C. SPEED MEET



The jett has .450 carb ( 90 jett carb) exhaust is 182 deg. Thinking about 190 deg. , to get closer to 200mph.mark, but with some throttle control. At this time throttle is excellent. What ya think.

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Old 06-13-2009, 08:57 AM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

For me better throttle response is worth a few mph. I know that sounds backwards but if you've run WOT motors in a non racing environment you know what I mean. I'm taking out exactly that this morning to tune for the NC event, a F3D with the FAI FIRE Nelson, no throttle, but a nitro head on it to make life a little easier. BTW in the motor pic that is the bottom of the inside of the crank you see through the venturie, bib big opening,
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Old 06-13-2009, 09:04 AM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

SACKRC... Don't worry about 200 for the NC thing... In fact if you plan on 165mph or so you'll be the fastest. Yeah, 165....


ORIGINAL: SACKRC



The jett has .450 carb ( 90 jett carb) exhaust is 182 deg. Thinking about 190 deg. , to get closer to 200mph.mark, but with some throttle control. At this time throttle is excellent. What ya think.

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Old 06-13-2009, 01:56 PM
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Let the taunting begin!

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Old 06-13-2009, 03:24 PM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

Yeah, I only turned 11,000 today. He should be OK with the 160-165....   
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Old 06-14-2009, 09:47 PM
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Default RE: MY ENTRY FOR N. C. SPEED MEET



Ladies, laddies, Try to be civil here



Especially you Evan, since I'm gonna wipe the mountian top with your hynie this year. Rich, I'm very excited to see your new ship do it's thing in a few short weeks. This is going to be an awsome day again this year!



All you East Coast Revvers this is the place to be and show your colors.



yeah 165 should be good enough...shoot for that...yeah, I like your thinking Evan.[8D]

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Old 06-19-2009, 06:54 PM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

Vicman,
Got and a good trim. Should be good to go, getting alot of air bubles in fuel line. I changed to jett bubbleless tank. Question can i put a T in the fuel line, between the needle and tank to fill up , or would that cause some bubbles as the fuel runs past the T fitting. Never use a jett tank seems a bit tough to fill up.
Also Im getting fuel in Lexinton, need a glow start and starter. and minor tools to get started. Im flying into Charlette , going to lexington and leaving from there.
will call you. thanks.
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Old 06-19-2009, 07:24 PM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

I won't cause bubbles, there's no where for the air to come from...
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Old 06-20-2009, 08:41 PM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

I've got plenty of 15% Byron if you want to use that.

Evan, are you still an iffy?
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Old 06-21-2009, 07:25 AM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

A T won't hurt as long as its plugged when not in use.
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Old 06-21-2009, 07:41 AM
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Default RE: MY ENTRY FOR N. C. SPEED MEET

I'm always an iffy... I am planning on coming up though, not sure what I'll bring. Itook the F3D out and tuned it up but it really needs a long landing area. Then I have my old Magnum, 8 years old or so and still flys great but really not that fast. Then the electrics, Ihave two new ones since last year, one fast one slow....
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