Sweepstakes - RCTLG - K K Iyer

Started by K K Iyer, May 10, 2014, 02:40:03 PM

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ahmedt


manojswizera

Russ-40 Trainer, Mr.moss, Pushler, Skysurfer, Mugi , F-22, Red swan, Xtra-300, redfury, flying mantaray.

ashok baijal

#27
This is a real GLIDER. Great  :bow:  :thumbsup:  :hatsoff:  :salute:  {:)}
5ft to 60mtrs. .... what is the glide ratio? Try launching it from a 20 storey building. RC will be a real requirement otherwise it will cover 60*20*(10/5) =2400mtrs
Think seriously of settling down in Bangalore. I am inviting you again. How long do you plan to be in Indore?

sundaram

Wow!!!! That's some glide Iyer Sir,  seemed like forever. Did it land finally? could not see it in the video clearly.  ;D

Nice build.  :thumbsup: :thumbsup:  {:)} {:)}

K K Iyer

Thanks Sanjay sir, Sandy sir, Ashok, Ahmed, Manoj, Anjan.

Wind dropped today after many weeks. Time to check out tow launch of my RCTLG.
Short (25m) line, almost nil wind.

www.youtube.com/watch?v=oTk_zad4SeI&feature=youtube_gdata_player

K K Iyer

#30
First tow by Ahmed, launch by Harveer.
All went well till base leg. Hit pole as i was afraid of over control.
Surprised at lack of damage. Not even a ding!
Never knew that 0.75oz glass adds such strength. 40% wt penalty forgiven...
(Intake of breath is by RC Aunt...)
http://m.youtube.com/watch?v=D631xtTaeP4&feature=youtube_gdata_player

SideWinder

Wow! Just WOW!  {:)}

P.S: All your videos are @240p max :(


K K Iyer

Thanks Sidewinder
Can you believe that the iPad camera is one mega pixel?
RC Aunt uses it because it is easy.
Maybe she should use my Samsung phone, whose camera is 8mp.
All this while we've been using low resolution to reduce upload size.
Hope next sunday pics/videos are higher resolution.

K K Iyer

What happens when you try to discus launch a high aspect ratio rc towline glider...

http://m.youtube.com/watch?feature=youtube_gdata_player&v=0tI2lGnxYqQ

K K Iyer

A soft nose helps, especially when backed up by glass cloth!

sanjayrai55


wingmanbunty

very good glide never seen such glide before  :salute:

wing finish is woow
EAT ,SLEEP , FLY

K K Iyer

No news on Sweepstakes.
Continuing experiments.
Desi Jugaad HiStart
First in India?

http://m.youtube.com/watch?feature=youtube_gdata_player&v=KCUOcwIxKxE

www.youtube.com/watch?feature=youtube_gdata_player&v=KCUOcwIxKxE

ashok baijal

#38
Good that you built one. You have been longing to have one for quite some time.

Your clarifications on
Type of rubber tubing used
Length of rubber tubing,
length of string,
rubber tubing pulled by what extent,
approx height gained by the glider,
do you put a stake at one end or someone holds the end.

This would help others in replicating a histart.

Next you should experiment on launching the glider using a winch. You can use a glow engine starter for the winch motor. A few pullies and you should have a winch working.

sanjayrai55

Did it over 40 years ago on a Yellow Bird  >:D >:D ;D

sanjayrai55

Used about 3 feet length, of which 1 foot was surgical rubber tubing. It was tied to  a wooden post. but if we used to much pull, it would go crazy ;)

K K Iyer

@sanjayrai55 sir,
Not RC, hence doesn't count. ;D haha, Gotcha >:D

K K Iyer

Crazy launch.
Result of release without wings level. Got a real shock!

http://m.youtube.com/watch?feature=youtube_gdata_player&v=glLQMmUoIk8

www.youtube.com/watch?feature=youtube_gdata_player&v=glLQMmUoIk8

sanjayrai55

Iyer sir; 40+ years ago the Radio Sets were single Channel, and had wires and valves not transistors and ICs :D

K K Iyer

Sir,
Just joking. No offense meant.

sanjayrai55

None expected. None accepted. None taken. None given.

;D ;D ;D

Iyer Sir, your build skills and knowledge levels are extraordinary  :hatsoff:

K K Iyer

@sanjayrai55 sir,
This reminds me of an incident in about 1970.
We were flying in the Polo Ground near President's Estate, which was for the use of the President's Bodyguard.
One immaculate Bodyguard on a horse taller than me turned up to investigate.
He rode up to me and asked with ultimate politeness:
'Aapki tareef?' (Instead of 'Who the hell are you')
Fortunately I had enough Urdu for an appropriate reply:
'Kaash ki hum tareef layak hote...'

sanjayrai55

You were lucky!

In circa 1986, we guys were flying there, and this giant Sardar Cop comes along, says "Tvada Boss kithe?" and I was shoved in front  :o :o

He gave us 5 minutes to get out of there! This of course was after Mrs. Gandhi's assassination!  8-) 8-)

vineet


K K Iyer

#49
Quote from: ashok baijal on June 09, 2014, 10:43:55 AM

Your clarifications on
Type of rubber tubing used. latex (catheter) tube 3/16" od, approx 1/8" id
Length of rubber tubing, 15 pieces of 3ft each, reef knotted
length of string, 180ft braided polyester line, like twine
rubber tubing pulled by what extent, 2x
approx height gained by the glider, guess 250ft/sqrt2, say 150-180ft. Since avg 60 sec, indicates sink rate of 2.5-3ft/sec (higher than i expected)
do you put a stake at one end or someone holds the end. one foot long screwdriver stuck in the ground

Hope this is of use to other experimenters. Please note I was using under 1kg tension, as my RCTLG weighs only 200gms.
Edit:
Since RCTLG was barely moving forward in level flight into wind, and the theoretical stall speed is about 5m/s, i estimate that the wind was about 15kmph during the videos.