Posted by bigtruck169 |
Nov 23, 2013 @ 04:22 PM | 941 Views
With a sensitive plane (near-neutral CG), the plane will first balloon (nose up) when entering lift, and raise the tail when leaving lift. If you wait for the tail to come up, you're already exiting the thermal. But then again, it's impossible to tell exactly how large the thermal might be unless you explore it first. So many people wait for the tail to rise, then circle around to get back into the thermal.
Personally, I prefer to circle around after the initial rise and come "back into" the thermal to see how fast it's moving and how large it might be with some figure-8 patterns once I'm established in the thermal. If the tail comes up, I consider that a failure because that means I've gone outside the thermal's perimeter and now I have to work to get back into it.
I'm no aerodynamicist but I see the whole plane lift up with a slight tail rise and an increase in speed. This without touching the sticks. The tail is lighter than the main wing so it rises faster causing a slight nose down attitude? I guess...
I mainly fly with a forward CG, too.
Are the edges of a thermal that sharp that it would cause the nose to pitch up upon entering it? Or the tail to lift upon leaving it? And actually see these reactions from a plane that merely 4x5 feet long? That sounds like just turbulence, which there's plenty of in thermals, to me.
When I funfly and sometimes during competition, if I have enough altitude to play with, I try to find the shape or the edges of...Continue Reading
Interfacing Spektrum DX7 to either DragonLink, EzUHF, Thomas Sherrer, or ChainLink LRS
March 17, 2011 Categories: Compatible Equipment Lists, Equipment Connections & Wiring, Featured by Ian Davidson 27 Comments
Connecting a Spektrum DX7 to long range radios is not documented well as most of the LRS manufacturers only explain how to connect their TX to Futaba radios. The DX7 has a trainer port that sends out PPM signals and some have tried to use this port for their LRS connection. The benefit of using the trainer port is that the DX7′s 2.4 radio is automatically cut from power and does not transmit any longer.
However, measuring the PPM’s signal power of the trainer port reveals that the signal is a lot weaker compared to the internal PPM bus signal. In theory, you want to provide your LRS system with the strongest PPM signal available, which means you have to use the internal PPM bus. This manual describes how to hook your LRS system directly into the PPM stream of the radio and also provides power (which the trainer port does not). While it requires you to open up the radio, cut some wires, make some solders, and drill a hole in the case, it’s really not that bad of a mod and provides a great solution that makes switching between LRS and 2.4 easy. Thanks to Ian for coming up with this solution and for writing it up!
This isn’t a detailed ‘how too’ manual, just a quick overview....Continue Reading
Just another sad heli guy pass away. Be safe. Dont know if law enforcement will do anything to stop us.
Queens man, 19, killed by toy helicopter shared passion for remote-controlled fliers with father
Roman Pirozek Jr. was in Dreier-Offerman Park — also known as Calvert Vaux Park — in Gravesend, Brooklyn when his remote-controlled helicopted sliced his head and throat Thursday.
Posted by bigtruck169 |
Feb 07, 2013 @ 02:59 PM | 1,844 Views
If you want a cheap quad to thrash around I think you might be going in the wrong direction. You can build a 400mm Hquad frame for about 4 bucks in 1/2" wood dowels and 1/8 birch ply. Run some 8 dollar Emax 2822s with cheap gemfan 8x4.5 props. This would allow you to use a 2200mah 3s for 8-9 minutes of tooling around. SimonK F30A escs and a Flip multiwii FC or a KKv2 if you want onboard programming without a bluetooth module.
The Hquad frames are hella tough and very rigid and dirt cheap.
light stryker -
5.8ghz 200mw micro stuff with bluebeam set, vrx on a 4 foot dowel/pole.
Stryker light, auw rtf with fpv gear and battery = exactly 400grams (14oz), thrust = over 17oz (500grams) (or more depending on prop but I like the 7x6 on the blue wonder 1700kv motor, speed range is 5-75mph dopplered)
vizio 15inch off 2200 3s = over 5 hours (removable black elmers foam board (velcro))
vtx and vrx powered off 1s ~150mah lipo each (about 30+ minutes possible, but I switch between 2 sets of batteries each flight)
3s 850mah flight pack (10-15 minute flight time cruising around, over 30 min possible by gliding around higher up)
pz0420-2.8mm lens with pan servo (case is dollartree foam board, paper removed, covered with uline packing tape (same for the elevons and verticals))
rp8d1 w/futaba 9capAnother FPV guide: http://videoaerialsystems.com/fpv-a-guide-to-success/
Posted by bigtruck169 |
Nov 21, 2012 @ 01:59 PM | 1,989 Views
During the past storm sandy in north east, we were out of electricity for almost 2 weeks. But we have natural gas supply (we can still cook). House was cold as hell.
So I try to figure out how to power up the heating furnace without 120v, at least heat up the house.
We are using steam heat (gas boil the water and steam just push up the pipe to upstairs). From what I saw, there is no hot water circulation pump or any circuit board, only wires to thermostat and the electric gas switch- solenoid. There is a small transformer (slightly bigger than regular cell phone charger) on ceiling. I believe this is the power supply for the whole heating furnace. I measure the output and it read 24volt AC
Now my question is how I get 24 volt AC, maybe using some old deep cycle battery that we use for charging in our flying field or worst just pull out my car battery just for emergency.
Some people told me to get a generator to main panel so I won’t have to rewire so much and at least house can have some light or so. But running a generator in suburban area is almost close to impossible. I will use it as last option.
Hope some electricians / plumber flyers here can give me some advice. Don’t know if we will be lucky to get power within 2 weeks. Thanks in advance. Mike
Posted by bigtruck169 |
Jun 04, 2012 @ 11:29 AM | 3,109 Views
Go "full screen" and turn-up the volume! The photography is HD, the planes are gorgeous, and, most notably, it is shot as the B17 takes off from Falcon Field in Mesa, AZ and then flies over the Superstition Mountains.
To the East of Apache Junction, then to Roosevelt & Canyon lakes, on the east edge of the Phoenix valley. The backdrops are stunning. Music is from the mini series John Adams.
Stryker 6x4 prop...I have also used the APC 6x4 e prop..The Stryker prop puts out more thrust though.I learned this early on..We used to build a lot of the F22 profile jets and powered them with the Stryker setup..I found out that the jets had quite a bit more vertical thrust with the stryker prop over the APC..
*** warbirds in bold ***
Jun 05, 2003 --> AeroBird 3
ParkZone Fall 2005 brochure
May 05, 2005 --> P-51D Mustang
Summer/Fall 2005 --> Typhoon 3D Brushless
Summer/Fall 2005 --> F-27B Stryker
Summer/Fall 2005 --> J-3 Cub
Summer/Fall 2005 --> Slo V
Summer/Fall 2005 --...Continue Reading
hinges - use the plastic strapping salvaged from packaging...I cut the strips into about 1" lengths and poke a few holes in each end so glue can penetrate all the way through, though the waffle texture is probably plenty of grip.Gorilla Glue (the white variety dries faster)
Ultra micro prop saver
1. spray can (wd40 tube) prop saver for ultra micro planes, no glue needed
2. is a small piece of plastic like from a broken toy or something, and I cut it into t round shape, then sand it down until it will barely fit...then press it in. I then drill a small hole in it with a pin-vice drill. I have no...Continue Reading
Boeing unveiled its hydrogen-powered Phantom Eye unmanned airborne system during a ceremony in St. Louis on July 12. The aircraft, which will stay aloft at 65,000 feet for up to four days, is powered by two, 2-liter, four-cylinder engines that provide 150 horsepower each. It has a 150-foot wingspan, will cruise at approximately 150 knots and can carry up to a 450-pound payload.
The two engines are Ford truck engines which have been modified to run on hyrodgen gas. The only emmission from hydrogen engines is water. The research and development for such engines has been conducted at the Savannah River Site at Aiken, SC.