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RTF Thumper's blog
Archive for December, 2011
Posted by RTF Thumper | Dec 29, 2011 @ 12:58 PM | 2,294 Views
This will be my FY-22
Posted by RTF Thumper | Dec 27, 2011 @ 05:05 PM | 2,686 Views
This is made from one sheet of Dollar tree foam Belive it or not
27 Dec 11 RTF Thumpers Screaming yellow Zonker (4 min 40 sec)

Posted by RTF Thumper | Dec 26, 2011 @ 09:56 AM | 2,699 Views
My new favorite and her Maiden
Maiden of the Radian Pro (6 min 14 sec)

Posted by RTF Thumper | Dec 24, 2011 @ 05:40 PM | 3,167 Views
My first attempt at making a 330 did not go great. It flew just not high alpha and was floppy. So instead of a $5.00 sheet of EPO I used a $1.00 sheet from Dollar Tree. This plane is a Rockstar.
Posted by RTF Thumper | Dec 23, 2011 @ 07:00 PM | 2,635 Views
This is my 5th scratch build, she is a smooth flier and will do 3D, This was her maiden and I have only been flying for 7 months, so a little more practice. She gets color in the morning.
28 inch 330 Extra Maiden Flight 23 Dec 11.wmv (3 min 5 sec)

Posted by RTF Thumper | Dec 21, 2011 @ 04:13 PM | 3,430 Views
Posted by RTF Thumper | Dec 20, 2011 @ 04:01 PM | 2,488 Views
150 foot ribbon pulled this morning at Legacy Park. Thanks to Bowsonn and BoomSplat. This is hard on the ESC and motor and battrey. It was 16 degrees with wind chill and the wind was blowing 10 MPH steady. The plane becomes tail heavy Duh so be ready for it. My plane has 26 oz of thrust and I think I can pull more.....maybe a addittional 50 feet. and with some practice tie it in a knot while flying. This Vid is EPIC.

150 FOOT RIBBON PULL.wmv (2 min 47 sec)

Posted by RTF Thumper | Dec 16, 2011 @ 01:46 PM | 2,367 Views
Just a great day with a great plane
Assassin Fast and low part 2.avi (4 min 27 sec)

Posted by RTF Thumper | Dec 15, 2011 @ 06:24 PM | 2,234 Views
Posted by RTF Thumper | Dec 14, 2011 @ 10:06 AM | 2,326 Views
Wings Over Legacy (7 min 5 sec)
Lots of fun and you get to see how tough the Reaper is BoomSplat brings her in veritical from 200 feet and smacks her on the nose,Repairs took less than thirty minutes.
Posted by RTF Thumper | Dec 12, 2011 @ 12:00 PM | 2,336 Views
This is a Extra 330, my first attempt at building a 3D plane. I will be using a 2812 motor from HK and a 1300 mHa battery (Nano Tech). The ESC is a 25-30 Amp Plush with a 7x6 prop. The Rx is a orange Spectrum from HK. Might try a larger prop don't understand the whole prop thing yet. The CG will be at 2.35 inches back from the LE for now, will most likely set her a little tail heavy will see. She is made from 9 mm EPP on the fuselage and 6 mm EPP for the wings and horizontal stabilizer. WS is 36 inches and build weight with no hardware is 3 oz her up weight will be 13 oz.
Maiden of the 330 Extra.wmv (5 min 48 sec)

Posted by RTF Thumper | Dec 11, 2011 @ 12:35 PM | 3,229 Views
More of what I know, to help others

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I have read a few post her that lead me to believe that some of us here are not sure what a CG is or how to find it. Some here write as if the CG is a movable point on the plane that can be solved with trim. I hope this bit of info clears it up. Now I am no pro but have now built 3 scratch aircraft one with no plans and of my design.

Correctly balancing rc airplanes is so important for safe flying, because any deviation from the model's Centre of Gravity (CG) can potentially result in the model being quite uncontrollable.

Every rc airplane (and all other aircraft) has a specific CG position, it's the mean point where all gravitational forces act upon the plane and hence the point where the model balances fore-aft correctly. You can liken a plane's Centre of Gravity to the fulcrum of a see-saw, for example. The CG point is determined during the design stage of the airplane or aircraft and is typically shown on a plan as a disc split in to four quadrants,

If you've built from a kit & plan the CG should be clearly marked on the plan but if you've bought an ARF or RTF plane then the instruction manual will likely give the CG position in terms of distance back from either the leading edge of the wing or from the nose.
Incidentally some model aircraft manufacturers specify a range that the Centre of Gravity can fall in to, rather than a single...Continue Reading
Posted by RTF Thumper | Dec 10, 2011 @ 02:01 AM | 2,660 Views
I will fly like this soon
Twisted Hobbys EDGE 540 (5 min 39 sec)

Posted by RTF Thumper | Dec 10, 2011 @ 01:30 AM | 2,588 Views
my fellow pilots soaring at the park
Notsogood and Bowsson soaring the Radian (3 min 42 sec)

Posted by RTF Thumper | Dec 10, 2011 @ 01:27 AM | 2,516 Views
chase and bump
Snowball and Champs (4 min 15 sec)

Posted by RTF Thumper | Dec 10, 2011 @ 01:25 AM | 2,404 Views
What a blast
Scratch build stunts (3 min 3 sec)

Posted by RTF Thumper | Dec 09, 2011 @ 11:20 AM | 2,038 Views
808 KC Drop (2 min 0 sec)
This was a first attempt the length and quaility will improve
Posted by RTF Thumper | Dec 06, 2011 @ 09:14 PM | 2,135 Views
This is a first that I know of.
The Second Flight of the Lyla Grace and Bomb Drop.wmv (6 min 42 sec)

Posted by RTF Thumper | Dec 06, 2011 @ 05:47 PM | 2,167 Views
This build was dedicated to my granddaughter Lyla Grace Hendershot. I can hardly wait until she can go fly with me. Her plane is so gentle and does it all. The first landing was caused when a bullet connector came unplugged. the second was when the stick type motor mount broke. both time I was able to land the plane. In the second event there was some minor damage. Already repaired her and upgraded the airframe with a bomb drop. This is one great plane if you don't have one you need one.
Maiden of the Lyla Grace.wmv (6 min 38 sec)

Posted by RTF Thumper | Dec 05, 2011 @ 08:50 AM | 2,245 Views
Conversion table for
knots to miles per hour KTS to MPH 5 Knots = 5.8 MPH
10 Knots = 11.5 MPH
15 Knots = 17.3 MPH
20 Knots = 23.0 MPH
25 Knots = 28.8 MPH
30 Knots = 34.6 MPH
35 Knots = 40.3 MPH
40 Knots = 46.1 MPH
45 Knots = 51.8 MPH
50 Knots = 57.6 MPH
55 Knots = 63.4 MPH
60 Knots = 69.1 MPH
65 Knots = 74.9 MPH
70 Knots = 80.6 MPH
75 Knots = 86.4 MPH
80 Knots = 92.2 MPH
85 Knots = 97.9 MPH
90 Knots = 103.7 MPH
95 Knots = 109.4 MPH
100 Knots = 115.2 MPH
105 Knots = 121.0 MPH
110 Knots = 126.7 MPH
115 Knots = 132.5 MPH
120 Knots = 138.2 MPH
125 Knots = 144.0 MPH
130 Knots = 149.8 MPH
135 Knots = 155.5 MPH
140 Knots = 161.3 MPH
145 Knots = 167.0 MPH
150 Knots = 172.8 MPH
Beaufort Wind Scale
Windspeed
in MPH Description - Visible Condition
0 Calm smoke rises vertically
1 - 4 Light air direction of wind shown by smoke but not by wind vanes
4 - 7 Light breeze wind felt on face; leaves rustle; ordinary wind vane moved by wind
8 - 12 Gentle breeze leaves and small twigs in constant motion; wind extends light flag
13 - 18 Moderate breeze raises dust and loose paper; small branches are moved
19 - 24 Fresh breeze small trees in leaf begin to sway; crested wavelets form on inland water
25 - 31 Strong breeze large branches in motion; telephone wires whistle; umbrellas used with difficulty
32 - 38 Moderate gale whole trees in motion; inconvenience in walking against wind
39 - 46 Fresh gale breaks twigs off trees; generally impedes progress
47 - 54 Strong gale slight structural damage occurs; chimney pots and slates removed
55 - 63 Whole gale trees uprooted; considerable structural damage occurs
64 - 72 Storm very rarely experienced; accompanied by widespread damage
73+ Hurricane devastation occurs