Was: EZB motor stick Now Wally Miller EZB motor stick

From: Ken Achee <ken_at_achee.com>
Date: Mon, 29 Nov 2010 20:52:21 -0600

Larry,

Speaking of EZB motor sticks. I've got most of the Walley Miller
EZB figured out. The only dimension given for the motor stick is the
length. What are suggestions for the size and density of lumber for the
stick?

Ken

On Mon, Nov 29, 2010 at 7:58 PM, larry coslick <kibbie_dome_at_yahoo.com>wrote:

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> *From:* ykleetx <ykleetx_at_gmail.com>
> *To:* Indoor_Construction_at_yahoogroups.com
> *Sent:* Mon, November 29, 2010 4:25:53 PM
> *Subject:* [Indoor_Construction] EZB motor stick
>
>
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> Larry.
>
> On you recods flight give an account of the flight
>
> Yang
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>
> First of all, I don’t mess with ¼ motor flights in ceilings over 100’ I
> prefer ½ motor or ¾ motors flights and have found that quarter motor flights
> don’t equate to full motor flights in high ceillings. Quarter motor flights
> usually fly in the cooler ground air while ½ motor flights and get the
> benefit of the warmer upper air.
>
>
>
> 35:01 flight at lakehursr, 2007
>
>
>
> The second or third ½ motor flights did 17:30 at an altitude of around 75’.
> I used a rather small symmetrical prop of 11.8” and a pitch of 19. The motor
> was 5/99 .024x13 and weighed.36 gram. I wound in 3330 turns to a torque
> of.09 and backed off 90 and loaded the motor at .53 inch ounces. These light
> models need to be launched at a rather steep angle to keep the outboard wing
> from tucking under. The model climbed rather close to the ceiling but I
> don’t have any records of how long it staved there. I do remember that its
> let down time was quite long. The model landed with 310 turns and that was
> the only official flight that I made with that model that day. I had two
> other records to shoot for the next day..
>
> For new indoor fliers don’t get carried away with building super light
> models. I usually spend a full day in selecting the wood for lightness and
> stiffness that is to be used in my next model. There’s so much more
> information on building and flying indoor models today than when I started
> 19 years ago.
>
>
>
> My first 30:00 EZB in 1993 weighed .83 gram and #34 did 34:00 at
> Akron and weighed .55 gram and that model did a no touch flight of 30:41 at
> Johnson City.
>
> Larry Cailliau did 35+ at Tustin in the late 90’s and I can’t remember why
> that flight was declared unofficial , I believe that his model weighed over
> .5 grams.
>
> Larry C
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>
> Hi, Larry, Max,
>
> Good to hear from you guys.
>
> The 6" 67 mg motor stick is originally part of a lighter 310 mg EZB. Max,
> if you recall, I had brought it to Lakehurst over Labor Day weekend. As it
> turned out, I switched the wing and prop from a heavier EZB, so that the
> total weight increased to 370 mg. That is how it appears in the INAV plan.
> For a 370 mg EZB, I would also put a little more heft into the motor stick.
>
> Keep in mind that the 30 minute flight at Lakehurst was one of its first
> flights and not yet trimmed perfect. It's difficult to determine what is its
> full potential. I believe on a good day at Lakehurst, 33+ is possible. We
> will see how it flies next summer at the hangar.
>
> I decided on a short motor stick because I thought it would better guard
> against motor stick bowing and twist, compared to a 7 or 8" stick of similar
> density and stiffness. At the same time, I can lose a few 10's mg.
>
> So far, I see that my light motor stick, even though it is only 6", is
> sensitive to the tension and twist of the motor. I have to back off about
> 150 turns and launch at .08 to .09 in-oz. But this is still a very large
> amount of torque and more than enough to take the model to the top of
> Lakehurst and higher.
>
> For me, all of this is part of an ongoing experiment. My newest EZB weighs
> 310 mg and has a 62 mg 6" motor stick. Again, perhaps the stick is too short
> and too light. I just don't know and will do my best to experiment and find
> out.
>
> I know that Larry has written that a longer motor stick is needed for a
> long cruise. I have the utmost respect for Larry and have learned a lot from
> his articles. I find it interesting to experiment and try new things, and I
> will report my findings as I learn them.
>
> Max,
>
> Can you send me a copy of your 320 mg EZB plan? I would love to see it.
>
> Larry,
>
> On your ?
> record flight, can you describe the flight profile? Time to climb, maximum
> altitude, cruise and descent times
> Thank you.
>
> -Kang
>
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>
Received on Mon Nov 29 2010 - 18:52:29 CET