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

40 size stick + K&B 61

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Old 01-03-2012, 03:32 PM
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WaffleMan
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Default 40 size stick + K&B 61

The little 46 LA just wasn't enough.... Post flight report will be in a couple of weeks, I have yet to finish installing the new engine. Pics will come when it its done. This ouht a go pretty fast, the K&B only has 1 run on it
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Old 01-03-2012, 04:05 PM
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Roary m
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Default RE: 40 size stick + K&B 61

A friend of mine did that with a K&B 61 pumper; it flew well until the horizontal stab exited the plane at full throttle in level flight. I would suggest some tristock to beef up the tail attachments to the fuse. I think it was a better flier with the bigger engine.
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Old 01-03-2012, 05:01 PM
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Default RE: 40 size stick + K&B 61

I doubt it will do any better then 80mph.
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Old 01-03-2012, 05:15 PM
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Default RE: 40 size stick + K&B 61

Well... It will go faster than it did... The 46 LA leaked half of the fuel it took in instead of burning it... The plane will stay cleaner to.
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Old 01-03-2012, 09:59 PM
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Default RE: 40 size stick + K&B 61

Propped right, an LA .46 should be able to drive a .40 size stick in the 100mph+ range with no problem. Keeping the stick together may be a different issue.
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Old 01-03-2012, 11:52 PM
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Default RE: 40 size stick + K&B 61


ORIGINAL: cutaway

Propped right, an LA .46 should be able to drive a .40 size stick in the 100mph+ range with no problem. Keeping the stick together may be a different issue.

No way. We have a hard time getting Q500 planes to go over 110mph with TT.40 Pro's with APC 9x6 props turning just over 16,000 rpms. We use a radar detector. A stick has too much drag to go that fast, especially with a LA.46.

Kurt
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Old 01-04-2012, 07:48 AM
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Default RE: 40 size stick + K&B 61

I fly an Ultra Stick 40 with a modified OS 61 on it. It really is not all that fast, but it is very fun to fly and has almost unlimited vertical. I supose you could play with props and get a little more speed out of it, but it is a stick after all. These things are made to be fun to fly, and they are. Put the 60 on it and have fun with it, you will love it with that engine. Mine will hover pretty well with the 61 on it, and have enough power to pull out of the hover.

Enjoy

Scott
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Old 01-04-2012, 10:30 AM
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Default RE: 40 size stick + K&B 61

No offense but isn't this an "Extreme Speed Prop Plane" forum??
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Old 01-04-2012, 11:26 AM
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Default RE: 40 size stick + K&B 61


ORIGINAL: smoknrv4

No offense but isn't this an "Extreme Speed Prop Plane" forum??
AMEN BROTHER LOL
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Old 01-04-2012, 12:23 PM
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Default RE: 40 size stick + K&B 61

40 mph is extreme to some...
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Old 01-04-2012, 12:48 PM
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Default RE: 40 size stick + K&B 61


ORIGINAL: cutaway

Propped right, an LA .46 should be able to drive a .40 size stick in the 100mph+ range with no problem. Keeping the stick together may be a different issue.
100mph with a 46 LA!?!? Either your crazy or we must be thinking of different engines. I am reffering to the O.S. trainer engine, not anything else. Besides, the engine in question (the 46 that is) spits out half of the fuel it takes in, instead of burning it. It is the worst "slimer" that I have ever seen. (as far as slime goes, it is not that bad for a trainer engine.... just so much slime)
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Old 01-04-2012, 01:47 PM
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Default RE: 40 size stick + K&B 61

Extreme is relative?
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Old 01-04-2012, 04:23 PM
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Default RE: 40 size stick + K&B 61

ORIGINAL: Bozarth
No way. We have a hard time getting Q500 planes to go over 110mph with TT.40 Pro's with APC 9x6 props turning just over 16,000 rpms. We use a radar detector. A stick has too much drag to go that fast, especially with a LA.46.
Apples/oranges. A Q500's spec 9x6 is for reving. The LA .46 is much more of a stump puller than a Q500 engine. It can turn a 9x8 or 9x9.
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Old 01-04-2012, 04:26 PM
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Default RE: 40 size stick + K&B 61

ORIGINAL: WaffleMan
Besides, the engine in question (the 46 that is) spits out half of the fuel it takes in, instead of burning it.
If its doing this, then your engine is completely worn out. What fuel were you running in it?
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Old 01-04-2012, 06:15 PM
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Default RE: 40 size stick + K&B 61


ORIGINAL: cutaway

If its doing this, then your engine is completely worn out.
I reached that conclusion on my own... That is why it is being replaced.

ORIGINAL: cutaway

What fuel were you running in it?
different fuels... in the 10 to 15 percent nitro range.... sometimes with added oil and sometimes not. However, I dont think its the fuel. I bought the engine and plane from the local clubs "fly it till it can fly no more and then some" guy... He does not take good care of his engines
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Old 01-04-2012, 06:40 PM
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Default RE: 40 size stick + K&B 61

My LA .46 is a beast running on 80/20 zero nitro fuel...but after 9 hours it still has a fierce TDC "pinch" and starts with one flip every time. Feed it a 5% nitro mix and it produces truly remarkable power for a "cheap" engine.

If the crank bushing isn't sloppy loose on yours, a new piston/liner would freshen up its performance quite a bit.

Another thing I did on mine was toss the stock OS muffler and fit one from a Fox Stunt .35 (the holes line right up) that I lopped the back off of to reduce backpressure. Its a bit louder, but the tricked out Stunt .35 muffler improved power visibly. The back half of the Fox muffler won't fall off like the OS units are prone to doing.
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Old 01-04-2012, 07:27 PM
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Default RE: 40 size stick + K&B 61


ORIGINAL: cutaway

The back half of the Fox muffler won't fall off like the OS units are prone to doing.
I have never had the back half of the muffler fall off. The whole muffler has come off, but never just the back part
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Old 01-04-2012, 07:35 PM
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Default RE: 40 size stick + K&B 61

This comment is not really directed at anyone but I have seen where someone will swap a larger engine and a tuned performance pipe on the same plane having previously flown it with the smaller engine and while the sound in the air may be enormous, the sound sometimes has the effect of speed; the two stroke unloading at high pitch just sounds fast. Traps or some type of speed recording device helps.
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Old 01-05-2012, 02:18 PM
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Default RE: 40 size stick + K&B 61


ORIGINAL: cutaway

Propped right, an LA .46 should be able to drive a .40 size stick in the 100mph+ range with no problem
Only in your dreams.
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Old 01-05-2012, 05:50 PM
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Default RE: 40 size stick + K&B 61


ORIGINAL: cutaway

ORIGINAL: Bozarth
No way. We have a hard time getting Q500 planes to go over 110mph with TT.40 Pro's with APC 9x6 props turning just over 16,000 rpms. We use a radar detector. A stick has too much drag to go that fast, especially with a LA.46.
Apples/oranges. A Q500's spec 9x6 is for reving. The LA .46 is much more of a stump puller than a Q500 engine. It can turn a 9x8 or 9x9.

A TT .40 Pro is nothing more than a sport engine. It is not ringed and has ball bearings. Your "stump puller" comment conflicts with the props you mentioned? I don't believe the LA.46 is either a "stump puller" or capable of turning a 9x8 or 9x9 with much success!!!!

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