Re: EZB motor stick

From: ykleetx <ykleetx_at_gmail.com>
Date: Tue, 30 Nov 2010 17:19:35 -0000

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@...> 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
>  
Received on Tue Nov 30 2010 - 09:22:53 CET