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RTF Thumper's blog
Posted by RTF Thumper | Dec 12, 2011 @ 11:00 AM | 2,269 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 @ 11:35 AM | 3,149 Views
More of what I know, to help others


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 @ 01:01 AM | 2,583 Views
I will fly like this soon
Twisted Hobbys EDGE 540 (5 min 39 sec)

Posted by RTF Thumper | Dec 10, 2011 @ 12:30 AM | 2,513 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 @ 12:27 AM | 2,439 Views
chase and bump
Snowball and Champs (4 min 15 sec)

Posted by RTF Thumper | Dec 10, 2011 @ 12:25 AM | 2,336 Views
What a blast
Scratch build stunts (3 min 3 sec)

Posted by RTF Thumper | Dec 09, 2011 @ 10:20 AM | 1,970 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 @ 08:14 PM | 2,066 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 @ 04:47 PM | 2,093 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 @ 07:50 AM | 2,181 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
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
Posted by RTF Thumper | Dec 02, 2011 @ 02:36 PM | 1,846 Views
This is a proof of concept This is a UM Snowball and she flies well. I used the parts from a Champ the total up weight is 2.6 OZ
Posted by RTF Thumper | Dec 01, 2011 @ 03:54 PM | 2,006 Views
This was my first scratch build and it flew well.
Maiden flight of the Taylor May.wmv (2 min 24 sec)

Posted by RTF Thumper | Nov 28, 2011 @ 07:26 PM | 2,157 Views
This scratch build is doing well. Found the CG of the little one and used a bit of weight to the big one tossed her in the yard and she flew 25 feet. Now to add the power plant and electronics.
Posted by RTF Thumper | Nov 27, 2011 @ 09:39 PM | 1,974 Views
This is my granddaughter's glider she loves it so I am Making one 3 times the size....Hope it flies
Posted by RTF Thumper | Nov 26, 2011 @ 09:38 AM | 3,863 Views
Great Snaps, Great Launch
Posted by RTF Thumper | Nov 25, 2011 @ 04:56 PM | 2,044 Views
Just drop this file on to your memory card under the DCMI folder, open and click the EXE file.
Turn your camera on then off and bingo done.
If you have any issues just PM me. This is for Vesion 3 only.
Sticky: Lipo Fire
Posted by RTF Thumper | Nov 25, 2011 @ 11:07 AM | 2,421 Views
BoomSplat just had his lipo burn up in his Corsair. This big three cell had no visual issue, Charged well. No puffing or any thing, he put it in his plane flew for a few minutes plane started acting strange. Landed and POOF lots of white smoke and started a thermial run away. He was able to save the Air frame but the ESC is melted. Guys this is a no SH#T heads up, have gloves and a fire extingusher at the field or you may lose a plane or worse yet get hurt. Please baby sit the charging of these lipos even if you have done it for years it only take once and it sad times for all.
Posted by RTF Thumper | Nov 24, 2011 @ 03:45 PM | 1,975 Views
Great Vid the best part is the last 20 seconds ......... Still laughing
Sail Planes at Legacy Park.wmv (5 min 45 sec)

Posted by RTF Thumper | Nov 20, 2011 @ 06:51 PM | 2,082 Views
On a 1 to 10 this night operation was a 9 on the difficulty scale. Seeing the plane is not the issue it is NO horizon or not seeing the ground. This night the wind was up to 20 mph. The wind was not helping But I still managed to drop an illuminated object from aprox 200 feet. Please enjoy and leave a comment.
PS I know the camreas suck but dark is dark.
The Assassin Owens the Night (6 min 36 sec)