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Old 06-17-2004, 08:34 PM   #31
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twist balance.

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Right now i've got mine at 4.5" back. I will probably eventually move it back to 5 or more but for now it's ok at 4.5" It's fairly responsive and it's fairly stable. My UCD balance is back beyond the recommended range and it isn't very stable but it'll do some really neat maneuvers. Hope this helps.
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Old 06-18-2004, 12:07 AM   #32
Cecil Marshall
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Well Gang:
I've been holding off on this thread to see how the rest of you have been making out with yours.

Here's what I've got in mine..New Webra Speed 50 (stock muffler[heavy]) swinging an APC 11.5x4 prop, 5-425 Hitec servos, Fut. 148DF receiver and a 1000 mah Fut. 4.8 volt bat. pack.

On assembly, I installed the motor as far back on the mounts, to get the spinner to blend with the fuse, as I could.
After final assembly, I set it on the balance stand and couldn't get it to balance at the rear 5" balance point even with the heavy battery as far forward as it would go under the tank.
I added 7oz of lead to the front of the mount and a "Higgly" 2oz spinner nut under the plastic spinner. This brought the balance point to the 4" mark with a total plane weight of 6lbs-2oz
Not wanting to "tempt fate", I left it at that for the "first flight"

At home I "bench ran" the Webra putting 5-8oz tanks of XP-15% blended fuel through it. I had it turng the 11.5x4 APC at 11800 rpm and still a little on the rich side.. The idle and transition was fair but not perfect...

At the field (first flight), it flew "off the deck" with only 2 clicks of down elevator needed.
After a few circuits to keep the knees from knocking, I put it through maneuvers.

It climbed "dang near out of site" but not "unlimitted.
Climb needed very little "right rudder" to keep it straight.
Stalls where "straight ahead" with no tendancy to drop a wing
It would hover,but at that weight and RPM, it took full throttle.
It wants to roll out of knife edge(severely) and pulls to landing gear.
It lands steady and slow.
Controls are "twitchy" even on "low rates" so 50% neg.expo. was "dialed in" on ail. and elev.. This smoothed them out.....

When I got home, I removed the lead and spinner nut and moved the motor as far ahead on the mount as it would go. It now balances at 4.625" and the plane weighs in at 5.5 lbs

Back to the field....The plane flys much better......but K.E. is still "the sh!ts"...I'll have to "program" it out.

I'll keep ya'all posted on the results as I get more time on the plane
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Old 06-18-2004, 05:44 AM   #33
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That's great info. Having a 1" range for the CG, I was curious, but also figured on the mid point for starters. Our LHS had three shipped in and all had some sort of damage to the wings. Replacements are on the way though.
I never crash...I land with style!

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Old 07-13-2004, 03:56 PM   #34
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I have one!!!


I received my twist last friday... Im currently building it and will fly it soon this summer! I'll have some pics on my site(www.teamcmb.qc.tc) soon!
This airplane is really nice!

Carl (maverick040
-Power is your friend when you know how to use it...
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Old 08-05-2004, 08:40 AM   #35
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Finally, I will have my twist friday evening. I wont be able to work on it then, and I work saturday, so maybe saturday evening I can get it built. I will be using a GMS .47 and standard servos all around (hitec 425's and futaba 3003's).
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Old 08-05-2004, 07:21 PM   #36
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the only thing i have against the twist (flight wise) is its knifeedge capability ...or should i say dibility it wont do knife edge too great but other words than that it seems to fly good.
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Old 08-05-2004, 08:12 PM   #37
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Originally Posted by Cecil Marshall
Here's what I've got in mine..New Webra Speed 50 (stock muffler[heavy])
Shame shame, you should know better than that Cecil!
MAAC - 64494

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Old 08-05-2004, 08:49 PM   #38
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Well, mine is a tad tail heavy but still flyable. I haven't moved the battery under the tank yet but I moved the engine forward (even carved and recovered a bit of cowl to give me an extra 1/2 inch forward)

The plane is responsive and has ample power with a .46FX running an APC 12.25 x 3.75 prop. Certainly worth the $$

Bob D.
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Member of MAAC since I joined

Lighten Up, Life is waaaaaayyyy too short
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Old 08-06-2004, 11:05 PM   #39
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Finally, I have the twist sitting on my work bench half assembled, and I just took it out of the box! Geez, half the work is taking it out of the plastic bags! I have to work all weekend, so maybe a test flight monday? Should have it mostly ready to go tomorrow evening.
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Old 08-07-2004, 09:35 PM   #40
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Mine is 5lbs 10 oz fuelled up
Saito 72 on 14X4 and 15 % fuel
hovers at above 1/2 - 3/4 throttle and powers out and axelerates well
vertically the CG is at 4.75 fly`s real nice but knife edge su....
much prefer my sudokhoi Morris for that will try to sort it all.
only 6 flights so far
fun airplane.
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Jean. C. Blouin
CFI Club Aeromodeliste de l`Estrie
Skype jean.blouin
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