________________________________
From: ykleetx <ykleetx_at_gmail.com>
To: Indoor_Construction_at_yahoogroups.com
Sent: Tue, November 30, 2010 11:19:35 AM
Subject: [Indoor_Construction] Re: EZB motor stick
Larry C
Hi, Larry,
Thank you for giving us an account of your record flight. Two items immediately
come to mind: .053 in-oz launch torque and the small prop you used. In other
model plans that you have published, you usually use 13"+ props and launch at
higher torque. I would love to hear some of your thinking behind using this
combination of prop, motor, and launch torque.
It is also very interesting to learn that you use primarily 1/2 or 3/4 motors. I
will start to do that. On my full motor flights where the launch is successful,
I'm hitting the ceiling at Lakehurst and Tustin a little too aggressively. Not
the best thing to do. The 3/4 motor will especially show me good data on the
right launch torque.
I have looked through all the old INAVs on your record flights, but have found
only a few instances. If you have the time, could you recount your 30+ minute
flights, the model you used, its specs, and the motor information? Anything you
can recount will be helpful.
Earlier this year, I had collected all the 30+ minute flights I could find in
old publications and posted this information on this list. It would be great if
we hear more about your 30+ flights.
Thank you.
-Kang
--- In Indoor_Construction_at_yahoogroups.com, larry coslick <kibbie_dome_at_...>
wrote:
> 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
>
Hi Kang
I'll be tied up for a week or two but I will get back to you with the
information that you requested
Received on Tue Nov 30 2010 - 11:17:02 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:46 CET