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Posted by scott page | Apr 04, 2021 @ 12:09 AM | 3,965 Views
My April 2021 contribution for the TCRCM newsletter is below. Note that the text is below, however attached is the article with images.


Mixes:
Frequently the mixes screen is simply a pass-through screen where the inputs are assigned their channel values based on the order in this screen. However the power of computer transmitters can be unleashed when mixing various inputs to a discreet output. OpenTX does this in the Mixer screen and an advantage of OpenTX is the mixes are completely customizable to whatever you can imagine.
When you are thinking of doing a mix you must fill in the blanks for the following statement. When I do _______. I want _____ to happen. “When I do” is your Input or source line is and “want to happen” is the mix line you’ll be inserting that source into.
For example: Coordinated turn: When I use my ailerons I want my rudder to yaw in the same direction. So I’ll be using an aileron source line in the rudder channel mix. These two lines will be additive as specified in the Multiplex option.
In this example I have rudder assigned to Channel 4. Note: any channel can be assigned to any control surface, thus: Rudder is not necessarily CH 4 – but that’s the channel I’ve chosen to use here. The first line of CH4 has as its source the input from the rudder line on the input page. The second line has as its source the aileron – which is set with a rate/weight of 50% and is added to the first line. This AIL line will only be in use when...Continue Reading
Posted by scott page | Feb 15, 2021 @ 05:52 PM | 9,227 Views
This is a short article for our club newsletter in March.

What are Expo and Rates (Weights)
Expo (exponential):
This setting alters how sensitive the sticks are around the center point. It does not alter the total throw of the servo movement. It alters the default linear curve to one that either is less sensitive (positive expo) or more sensitive (negative expo) around the middle point. (Some transmitters including Futaba use negative expo for less sensitivity.) Typically, I start with 30% for all my aircraft on all surfaces, and then alter as deemed necessary. This allows for a little more stick movement around the middle for more precise flying. Typically, 25-40% expo on control surfaces is typical for beginners. 3D planes generally use much higher expo and high speed planes lower values for expo.

Rates (weights):
Rates are called weights in OpenTX. Dual, or multiple, rates controls the total deflection (throw) of the control surface. On most of my models I setup 3 rates. This is mostly due to using a Taranis radio where most all the switches are 3 position. It allows me to setup a low, medium, and high rates on any or all of the control surfaces. I setup my multiple rates like this: Low rates match the Low throws specified in the build, Mid rates match the high throws specified, and high rates utilize the maximum servo throws allowed without binding the servos. Think of it as low, mild, and wild.

By mixing your preferred expo and rate settings in the radio, you can instantly switch from precise control with lower throws to insane 3D with high/extreme throws. The expo setting will assist in the sensitivity around mid-stick.
Posted by scott page | Feb 15, 2021 @ 05:00 PM | 9,179 Views
I've started a series of articles for out club newsletter on using OpenTX. Here is the first installment. - Because I have settings in the fonts that won't copy to RCG I've attached a .pdf of this article.
Posted by scott page | Oct 17, 2016 @ 01:30 PM | 46,212 Views
Posted by scott page | Oct 03, 2016 @ 12:54 AM | 44,301 Views
Several years ago Aloft Hobbies sold this airframe they called the Killer Bee. It was sold as the Hummingbird in other places, and probably another name or two.

Well - it's almost ready for maiden. Setting it up on my Horus X12S transmitter.
Ailerons and elevator. -- roll and pull. More details to follow.
Posted by scott page | May 08, 2013 @ 06:24 PM | 66,492 Views
I've seen lots of trays. Over the past few years I've taken pictures of every tray I saw and compiled a collection of what I likes, and didn't like so much. My wife bought me a wonderful tray that requires a harness to wear properly. It was expensive and effective, but the harness left alot to be desired and the tray had some features that bothered me a bit. One thing is I want my hands to rest in one place so that they are anchored to datum (as in surveying). Secondly I wanted to be able to reach all of the switches easily. I wanted the transmitter to hang level from the strap - and I wanted a strap - not a harness. It needed to be somewhat compact but also protect the transmitter. I don't know if I succeeded at making the perfect (for me) tray or not yet, but for now it seems to be working pretty good.
Its laser cut from OPTIX 18" z 24" .220 in. Acrylic Sheet. The spring on the bottom was made from LEXAN Polycarbonate Sheet that is .093 inches thick. Plastic materials were purchased from Home Depot. The T-nuts and hex cap screws are 3mm. Lexan bends very easily when heated with a heat gun - but easy not to get it too hot too fast or it will bubble and ruin your surface. Acrylic is even easier to bend because it is not so likely to bubble, but will if heated too fast.

I've included several photos of the final product and an zip file with two illustrator files for cutting.
Posted by scott page | Mar 31, 2013 @ 01:03 AM | 58,914 Views
Lightening holes in foam is nothing new. The problem is that rigidity and construction integrity is compromised in the process. My goal is to try to eliminate much of the foam in the wings of a "flying W" without sacrificing strength or rigidity.

The Flying W is basically a design similitude of the Robbe Gemini - which was reverse engineered and plans posted on Watt flyer and RCG about 2007 or 2008 as the "Capricorn". The plane is actually an amazing plane and an absolute hoot to fly. The lower the wing loading the better they fly.

So as I'm learning to use a laser cutter I needed a more challenging project and so the Swiss W was born. In addition to the honeycomb pattern cut into the depron, used a 12mm CF tube back bone which extends from the motor mount to the root of the stab. This back bone will be the hard anchor point for the battery and ESC. The firewall is constructed from poly-carbonate that has been heat shaped so it has a 4 degree up thrust. I predict that as the thrust increases, the firewall will flex forward to reduce the amount of up thrust -- possibly helping to remedy one common problem with the W/Capricorn/Gemini -- and that is altitude gain on high throttle. Yes, you can mix in elevator -- but that increases parasitic drag -- a changing thrustline could be more efficient.
Below are the building photos so far.

I used Ultrakote, MonoKote, and New Stuff for different areas covering. New Stuff is much lighter -- shrinks less so is less of a problem deforming the panels. Next preference was ultrakote. MonoKote was really heavy, needed much more heat to start with, leaving less of a range for adjustment of warps and such.

To do it again I'd just use 100% new stuff from alofthobbies.com
Posted by scott page | Jan 21, 2013 @ 02:36 AM | 58,698 Views
In the upper left corner of the RCG menu there is a link to "My RCGroups".
See the attached image for the link below that which will cure chronic pains in the butt.