I am thinking of putting my OS.61 in a Hanger 9 Aresti. I want the plane to be good for pattern, and with a little extra ooomph.

Would this be overkill? In particular it looks like I have to install the engine inverted. Any problems with this?

ohiomark,

Here at our club, myself included, all we use is the .61 size engines on the (5) aresti's. The engine of choice is the Webra .61 Speed w/ tuned pipe. One fella has the OS .61 FX w/ tuned pipe, aresti flies great. Just be prepared for a lotta speed.

chris

That's a lotta speed! How much tail weight do you need on these? Mine (avitar) needed the battery way back with the 46 FX.

The inverted engine is no problem if you get the low-speed needle just right. I have a ritual when I start my aresti: Thumb over carb and prime a few flips. Notice fuel dripping out of carb. flip plane up on the left wingtip and flip again, then point nose up. Watch goop / fuel drain out the muffler. Attach glow. Flip the spinner clockwise with fingertips. Observe engine starting on kick-back from clockwise flip (watch those fingers). Fly.

I think I have about 1.5oz of lead in the tail....btx, rtx all in the front of the plane. The webras are so light that it takes a little more nose wgt. than other engines in thier class. We also mount inverted with no probs of starting. Some do similar technique as youself. I use forcepts on the carb line so no fuel reaches the needle during fill. Also we found that quick fill fuel valve dont take the g's we put these planes through. All of us switched to fuel dots...much better. I have always used the dot on my large scales, but since we fly "full throttle" with these aresti's, the 16oz fuel just dont last very long, we tried to save a little fill time.

Sounds like ya all are having as much fun as we are. Try the knife edge snap on low rates, start with the first snap at 3ft of the ground then let er' roll up. I bet she'll do at least 10 before she gets outa sight. High speed inverted flat spins are cool too.

later,
chris

Chris,

Now you gotta tell us how to do this trick.

I replaced the stock OS 46 FX muffler with the Tower muffler (plenty of loctite on the screw). Wow!! Big difference! What a screamer.

bgi,

when you enter the knife edge manuver, be about 3-4 ft. high, be sure you have enough rudder to hold knife edge at this level...once in knife edge you already have rudder input, so just add aileron and watch the plane snap up, continue to add aileron after the last snap and she'll do as many as you want if you have enough power and rudder to hold knife edge...just be sure to release aileron when the plane snaps or she will enter a snap stall at full throttle, which looks cool but dont let her get away from ya.

chris

Lemme try that one at altitude first. Sounds very likely to make a bucket of balsa splinters. Is the plane going to roll? And does this mean I need to alternate rudder inputs to keep up with KE?

I'll try this one on G2.

thanks!

What are fuel dots?

Also, Do you have any back pressure trouble when you use the forecept to clam the hose to the muffler?

Fuel dots are fuel filling devices. They are tubing plugs which are fitted into a recepticle in the fuselage. Normally, they look like a dot on the fuse. When you pull them out, they bring the fuel tube with them.

To fill, remove the dot/plug, pulling the fill line out through the hole in the fuse. Hold the line, remove the plug, fuel, replace plug, push back in to recepticle. done.

Full throttle (CHRIS)

Could you explain how you mount the tuned pipe on the Aresti.
I have a Irvine 53 on mine and enjoy it - but would like to put a "pipe" on it. The muffler seems too close to the leading edge of the wing for a pipe to clear it.

BGI
I got my Irvine 53 back from Sig - all they did was change the conrod - I have not yet had a chance to run it - I just remounted it this past weekend. I'll let you know how it holds up when I get to run it some. Been unable to fly at all since 10-02 - hopefully I'll get to sometime this month.

Thanks Eddie

bgi,

when you enter knife edge the aresti will hold that manuver until you change it. when you throw aileron into it she will snap up very quickly, if your plane will hold knife edge with out any aileron input or elevator (like mine) then this manuver is so easy you wont believe your eyes. the aresti is the most stable .40 size plane i have ever flown.


eddie,

my webra is mounted inverted and using a short header from macs pro. the tuned pipe is also from macs pro and is not the quiet version so its shorter. i have the pipe riding just above the left wing mounted on the side of the fuse. use heat reflective tape on the wing below the pipe so that the heat does not disturb your covering.

chris

Chris
Thanks for the answer.
I was thinking of the quiet type pipe. Actually the "sound" is why I'd be interested in a pipe. the 53 has plenty of power for me at this time. I'll need to get more stick time to be intersted in more speed.

Thanks
Eddie

Chris,

My Aresti is my second plane. I believe you when you say it's stable! I was quite impressed with it's "go where you point it" behaviour and how easy it is to land. It was something getting used to how long it takes this thing to slow down for approaches compared to the trainer.
I've been practicing KE for a while and know that I need to move the CG back some. I expect it will be much livelier after that. Either the metal H9 engine mount has to go or some lead is going in the tail. Currently using an 11x5 to keep the speed down, but thinking it's time to go back to an 11x6. I bought a Saito 72 for it, but am keeping the 46FX on it now that the tower muffler woke it up from it's slumber.
Have you flown a Kyosho Sensation or Majestic 40 size? I have a couple sensations still in the box from the Tower clearance. I'm tempted to get a Majestic (tower please put them on clearance) after reading about how stable they are. On the other hand, I'm thrilled with the Aresti.

swlarcham,

The Tower muffler has the advantage of diverting most of the goop above the wing if you aim the tip up. Just do some upside-down every now and then to clear the goop out.

BGI
I don't mean to change the subject BUT
Did the tower muffler make all "That" big a diff on the 46FX.
And what diff was there in sound output.
I have a OS46FX on a Fazer that might benefit.
I do however like the quieter sound of the stock muff.
I've had a magnum that screamed -literally. It wasn't all that powerful but it sure was loud.
I have a mentor that is DieHard pattern flyer and DieHard low noise output. I acquired some of his tastes for quiet engines -esp the sound of a tuned pipe.

tha os 46 and the irvine 53 stock are the quietest motors I'm experienced with.

but a little extra power is alsways nice :-)

eddie

For me, the tower muffler made about 1500 RPM difference and the engine has more torque throughout the range. It's a lot louder than the stock muffler with baffle and noticeably louder than stock muffler with baffle removed. On the other hand, I've heard the full-size tuned pipes run and it's nothing like the noise those make. I bought it on advise from RCU. It's by far the best bang-for-buck performance you can buy for a 40-46 engine. (you can make a cheaper one, but can't buy one). Clean the threads with acetone and use loctite on the through-the-muffler screw or you'll lose most of the muffler.

I, too, really liked the low noise level of the stock muffler with baffle. But the extra punch was worth it. The plane holds knife-edge much better with the tower muffler. Before, it was tough to keep the nose up.

I had an old 1978 K&B 61 RC with perry pump. My gosh, that thing was so loud it was painful. But you talk about some power! I could hardly stand to be close enough to it to tune the needle. I never could get it to transition, and it was a making my wife really hate the hobby just breaking it in, so I sold it.