CheezeyPoof

An acquaintance of mine who is a very experienced pilot showed up today with his first gasser. Although he is not new to 120ish size planes, this was the first with a DA 50 on a new DP Edge.
He was going to fly it. Runs were good. Range check was good. What was missing was the "right/wrong" combination of checks.
Taxing around, the engine which was running good just quit. Started it back up and after a bit ,it quit again. We initially thought a glitch due to the ignition and receiver may have bee to close. What was happening was when he moved the ailerons, the engine quit. I made a joke " Does that new JR have "Throttle/Aileron Mixing." Well darned if it didn't right their on the screen. We even asked the local pro why would you use that? Who knows but it was right their. After turning it off, everything was fine.

I guess a good question here would be where would you use throttle/aileron mixing?

RichLockyer

Hmm... not aileron, but throttle/elevator mixing could be used to combat thrust angle problems

causeitflies

The radio probably allows mixing any channel with any other channel, so....

jonkoppisch

My Feedback: (162)

Heli radios use that kind of mixing.

jwoolridge

Heli pilots use throttle to cyclic (aileron and elevator) mixing to counter bog (slowing of headspeed) When bog occurs cyclic rates slow and flips and rolls are not of consitent speed (just like hitting low rates halfway through a roll or a loop with a plane except the lose of rate is gradual throughout the maneuver). I can't really see a use on a plane. Hope this clarifys the use of throttle to aileron or elevator.

BaronSchwab

Thats for helis not planes.

DBCherry

My Feedback: (4)

That's true, but most Futaba computer radios can be switched between plane and heli functions. Are JR's the same, and are we sure the guy didn't set the plane up under helis?
Dennis-

BaronSchwab

I think JRs can switch between acro and heli too.

MinnFlyer

My Feedback: (4)

A better question would be:

Why would you use a JR Radio?

[sm=lol.gif]

P-51B

My Feedback: (5)

Uh, Oh...I better go get the popcorn popper warmed up!

Jimmbbo

Aw, geez... let the flames begin

MinnFlyer

My Feedback: (4)

ONLY KIDDING!!!!!!

Al Stein

But another serious question would be whether there are any other unexpected mixes hiding in there?

BaronSchwab

Time to grab the popcorn the soda and watch the show thats comming!!!!! This is gonna be great!!!

A better ? is why would you be flying on the heli mode?????? [>:][>:]

Jim C.

HAHA whos kidding?? why WOULD you use a JR radio???

FUTABA ROCKS!

tiggerinmk

I bought a new Futaba radio a couple of months back, it's going to the swap meet next week

I ask you, who needs dual rates on the throttle?

dr_wogz

My Feedback: (3)

Despite the nomenclature,

'Hovering' an airplane [fixed wing] does not require 'heli' settings on a radio...

RichLockyer

Someone with an incredibly overpowered plane that will self-destruct in level flight at full throttle?

daveopam

My Feedback: (9)

Maybe I shouldn't admit it but....................I put EXPO on my throttle with my new 9C.
It seemed to smooth out the transition just above idle.

David

daven

My Feedback: (1)

Dual rates on throttle are for when you are in a class like SSC combat where you are not suppose to turn RPM over 17,500. You set the low rate so that the barrel closes just enough to keep you under the limit, then when you are in the air you flip to high rates where the barrel opens wide.

Not that I would ever reccomend this practice....

I could probably think of a few other uses, but thats the first that came to me.

tiggerinmk

Actually it was kind of a joke. I'm used to JR gear which has a fixed mode and the channel assignments are clearly marked on the receiver, so you don't usually even have to think about which channel is assigned to which function.

Recently, I got a Futaba 6XAS from the LHS that was closing down. I must've switched it from mode 1 to mode 2 because the elevator dual rate affected the throttle stick

RichLockyer

LOL! Like the F1 rule that the cars had to be at (or above) a specific ground clearance when leaving the pit area.
The verbage "when leaving the pit area" was to indicate that the spec was to be met with new tires and a full fuel load.
This was interpereted by the crews to mean "when leaving the pit area".

They found that by installing a hydraulic system not unlike that on a low rider, they could drop the car to minimal clearance AFTER leaving the pit area. The improved aerodynamics more than made up for the added weight of the lift system.

CheezeyPoof

Thats pretty funny. You better close this while were ahead eh?

DocYates

My Feedback: (102)

I think this points out how we can get ourselves in trouble with these complex readio sytems. Recently on a first test of my turbine, of which myself and at least two others had gone over the radio setting, it was discovered in the air that I had inadvertently assigned the gear switch to the dual rates, of which had + expo mixed in. Needless to say, when the wheels were up all was good, but when they came down, holy cow, was it a beast. We decided to make a wheels up landings, and the only damage was some paint scuffs on the bottom of the plane, but I learned my lesson, I will now go through and quadruple check all mixes and assignments before the plane leaves the ground.
Tommy

BaronSchwab

Ay, yup, yup, yup....You hit it on the head.

Junkie Radios do have heli, acro, and glid settings.