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

OS .46FX Needs Some Speed

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Old 05-21-2006, 04:40 PM
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Fuzz1029
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Default OS .46FX Needs Some Speed

I have an OS .46 that needs a new home (ARF) and would like some suggestions. My only requirement is that it be capable of going fast. From what I have seen the F-20 is pretty popular. Any other suggestions?

Thanks in advance.
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Old 05-21-2006, 05:46 PM
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MattyC-130
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Default RE: OS .46FX Needs Some Speed

If you are looking for speed you need to max out recomended engine size. IE I use Magnum 52s in all my 40 size speed planes, 75 in 60 size plane and 91 in 60-90 size plane. There is no substitue for displacement just make sure its short stroke for RPM. Long strokes are only good for torque. I would try to find some 25-40 size plane for the 46. EZ used to make little 25 size mustang racers that would be perfect for the 46.
Hope this helps
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Old 05-21-2006, 07:35 PM
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Cyclic Hardover
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Default RE: OS .46FX Needs Some Speed

The OS 46 would not really be a powerhouse on an F20. It'll just be "okay" If you want to get it on something impressive, Small thing like the Shrike Arf or some Q500 thing. with a 9ish prop onit, it's going to move.
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Old 05-21-2006, 08:18 PM
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combatpigg
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Default RE: OS .46FX Needs Some Speed

Even with a Q-500 ARF, it will lose its' luster pretty quick. I would put it in a Diamond Dust, which isn't much harder to build than an ARF. I don't think you will get bored with a DD, can't say the same for a quickee.
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Old 05-22-2006, 08:00 AM
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Default RE: OS .46FX Needs Some Speed

The F-20 is a decent choice, but you will want to build the kit version and ensure it has retracts in it. Some of the ARFs are pretty quick, even with the fixed gear, when set up well. As noted, you need a decent engine up front.

The Q-500 route is an easy way to get yourself into something quick. You get good speed, stability, slows down nice for landing - no retracts or other complexity. With a 46FX in stock condition, stock muffler, 9x6 or 9x7 prop - 120 mph is easy.

Depending on the condition of your 46FX, your best bet for some improved performance is adding a jett-stream muffler to it. The engine responds extremely well. No complexity at all - just bolt it on. This setup would give you superior performance on either something like the F-20, a Patriot, or the Q-500 setup.

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Old 05-22-2006, 09:17 AM
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daven
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Default RE: OS .46FX Needs Some Speed

A viper or predator would be a good choice for that engine, capable of 120 mph with a 8.8" x 8.75 pylon prop (or something similar).

The FX likes to turn up more than the AX, try to fly around 16,000 rpm for best top speed.
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Old 05-22-2006, 10:41 PM
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Default RE: OS .46FX Needs Some Speed

I'd say the Diamond Dust, I never get bored of mine
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Old 05-23-2006, 12:03 AM
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Default RE: OS .46FX Needs Some Speed

I'd go with the F-20. It's a real nice plane, and they fly good. All
you need is a four channel radio, maybe a Tower muffler ($15.00)
a 9-7 prop....and let 'er rip !! [sm=thumbup.gif]

FBD.

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Old 05-23-2006, 01:28 AM
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Default RE: OS .46FX Needs Some Speed

What's the absolute fastest, throttable engine for the f-20??
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Old 05-23-2006, 01:55 AM
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Default RE: OS .46FX Needs Some Speed

Jett-60LX

OPS-60

Rossi-65 DF

OS-77VRDF

Just guesses-

As for reasonably sized powerplants with minimal mods:

Jett-60LX
Jett-50
YS-45 Macs 7.5CC pipe
Webra-50GT
Rossi-53

etc.
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Old 05-25-2006, 12:20 AM
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Default RE: OS .46FX Needs Some Speed

I have the OS 46fx with Jettstream muffler turning apc 9x8 on a Kangke F20 and I would not call it just decent power. It is a screamer doing low passes at about 120mph. The OS46 can barely fit in the nose and I had to put all the radio stuff in the tail to balance. I don't see how you can fit a 60 motor in a 40 size F20. Only thing I would hope for is retracts for this bird.
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Old 05-25-2006, 09:11 AM
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Default RE: OS .46FX Needs Some Speed

ORIGINAL: kmtranmd

I have the OS 46fx with Jettstream muffler turning apc 9x8 on a Kangke F20 and I would not call it just decent power. It is a screamer doing low passes at about 120mph. The OS46 can barely fit in the nose and I had to put all the radio stuff in the tail to balance. I don't see how you can fit a 60 motor in a 40 size F20. Only thing I would hope for is retracts for this bird.
If you want more yet, the Jett 60LX is a .40 sized motor and has the same bolt pattern as your .46. MJD
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Old 05-25-2006, 09:18 AM
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Default RE: OS .46FX Needs Some Speed

ORIGINAL: kmtranmd

I don't see how you can fit a 60 motor in a 40 size F20. Only thing I would hope for is retracts for this bird.
Just of note - The Jett 60LX noted here is a "40" size engine - same case as the Jett 46,50 and the same footprint and mounting as the OS46 engines.

(oops, someone beat me )

BTW kmtranmd,
if you have an opportunity, email me a few photos of your plane and engine install.
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Old 05-25-2006, 09:36 AM
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Default RE: OS .46FX Needs Some Speed

Macs pipes makes a pre-tuned long pipe setup for the OS .46 that will make
it scream. Here's a cool plane....with wheels !!

http://www.hobbypeople.net/gallery/123780.asp [sm=thumbup.gif]

FBD.
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Old 07-31-2006, 08:00 PM
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Default RE: OS .46FX Needs Some Speed

Not to get off topic here, but will mufflers made for the 46fx work equally as well for the 46sf, and how should I prop the engine for speed?
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Old 08-02-2006, 01:34 AM
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Default RE: OS .46FX Needs Some Speed

The prop depends on a few factors....fuel ect. Usually a 9-7, 9-8,
or a 10-8 MAS will give you some decent speed. In any case, you
need some big pitch, and all the RPM's it will turn for speed.

FBD.
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