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

Little Toni

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Old 04-07-2006, 08:13 AM
  #1  
rcflyerdave
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Default Little Toni

My friend just maidened his Toni with a Evelution 100 and a 14/6 prop.It didn't seem too fast to me ,about 85 mph guessing.I believe about a 12/8 would give more speed.Any comments or suggestions about plane ,motor,and prop.
Dave
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Old 04-07-2006, 09:56 AM
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Default RE: Little Toni

Nothing flies "fast" on a 14-6 prop unless you spin it through the roof. It's a horizontal helipcopter blade good for lots of static thrust and tons of pull at moderate flying speeds. A 6" pitch prop requires minimum 14,960 rpm to pull something 85mph. Was he really running that fast?

In 12" diameter I would probably run higher than 8" pitch though on that motor, 9 or 10 perhaps. Using the admittedly crude rule for load factor of diameter cubed times pitch, for a similar load factor in a 12" prop you need about 11" of pitch.

MJD
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Old 04-08-2006, 12:07 AM
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Default RE: Little Toni

Amen, Brother....why use a lame 14-6, when you can use a 12-8 ?

FBD.
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Old 04-08-2006, 07:35 AM
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Default RE: Little Toni

I run a 13/8 apc on a G90 in my Shoestring and it's a mover.
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Old 04-08-2006, 10:48 AM
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Default RE: Little Toni

With a 11 X 8 apc and Jett 90, the Tony will move out to about 130. The Jett turning around 15K. The Tony will stay on a Alley Cats tail with a strong well tuned engine. Buddude 8 proved that to me a few weekends ago after having a little shootout locally. There are not many 60-90 engines out there that will turn the rpm's needed to make the Tony scoot. Sad, but true. The YS 110 with a 12 X 14 apc will make the thing scoot with 30% fuel, but you gotta be a 4 stroke guy willing to abuse the engine a little. They look nice and fast on the ground though!
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Old 04-08-2006, 09:22 PM
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Default RE: Little Toni

The YS 110 with a 12 X 14 apc will make the thing scoot with 30% fuel, but you gotta be a 4 stroke guy willing to abuse the engine a little. They look nice and fast on the ground though!
i did a comparison with a number of props so far:

12x11 at 12,700rpm
12x14 at 12,400rpm
13x10 at 11,300rpm

the 12x14 was NOT faster than the 13x10 (this is by subjective feeling) and the engine showed a flywheel effect of being underpropped. the 13x10 is about optimum - and no, 11,300rpm is no abuse. 12,700 get's closer to red-line.

i guess it all boils down to - max speed ===> thrust=drag ====> maximize power

i can mix up some 50%.... the ys can handle it.
[sm=sunsmiley.gif]
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Old 04-09-2006, 08:46 AM
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Default RE: Little Toni

Yeh, Don't forget to post pictures inthe "Saturday Stuffings!" Just kidding, Should be very impressive
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Old 04-21-2006, 03:53 PM
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Default RE: Little Toni


ORIGINAL: rare_bear

The YS 110 with a 12 X 14 apc will make the thing scoot with 30% fuel, but you gotta be a 4 stroke guy willing to abuse the engine a little. They look nice and fast on the ground though!
i did a comparison with a number of props so far:

12x11 at 12,700rpm
12x14 at 12,400rpm
13x10 at 11,300rpm

the 12x14 was NOT faster than the 13x10 (this is by subjective feeling) and the engine showed a flywheel effect of being underpropped. the 13x10 is about optimum - and no, 11,300rpm is no abuse. 12,700 get's closer to red-line.

i guess it all boils down to - max speed ===> thrust=drag ====> maximize power

i can mix up some 50%.... the ys can handle it.
[sm=sunsmiley.gif]
I am courious which props you are comparing, are they all the APC:s brand? I am also running a few high pitched props on my piped twostrokes for good speed and quiet operation, and it works nice. However I think the rpm difference between the 12x11 and 12x14 should be more than 300rpm.
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Old 04-27-2006, 09:28 AM
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Default RE: Little Toni

Rare Bear, I've been using an APC 13/13N on my Toni/110 and 30%. Have you tried that combo? Before my tach broke I was getting around 10,500. I will have to try a 13/10 and compare.
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Old 04-28-2006, 08:21 AM
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Default RE: Little Toni

I put an OS vrdf 11-9. It flies impressively on 15% fuel...

randy91 on mine with an
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Old 04-28-2006, 08:23 AM
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Default RE: Little Toni

Well,

That did not post correctly. I put an OS vrdf 91 on my Toni. With an 11-9 apc and 15%
she flies impressively

randy
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Old 05-02-2006, 05:42 AM
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Default RE: Little Toni

got one new in box (little tony), any offers?
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