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Mikado Modellhubschrauber . GrandRC . CanoMod

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Crashed? Discussion and Photos > Complete brain failure?
 
 
bmw
Senior Heliman
Location: Lake Zurich U.S.A.

How many of you have gone inverted without hitting idle up first



Runway? what runway??
10-01-2007 Over year old.
HOMEPAGE  
 
 
wlfk
Veteran
Location: uk

Me.

I've since gotten rid of normal mode completely.

K

A bit like a kite, but 500 times more expensive
10-01-2007 Over year old.
 
 
Raptor30Heli
Senior Heliman
Location: Oak Creek, WI

Quote 
I've since gotten rid of normal mode completely.

How do you start your heli??....or if electric - spool up from a dead stop?

-Mike

Team QuickUK Pilot
10-01-2007 Over year old.
 
 
wlfk
Veteran
Location: uk

It's electric with a governor and with slow-start.

I did have just normal mode for a few days, and it didn't seem to be a problem. Now I have matched pitch curves, with 0-50-20-20-20 for normal mode. I spool up to 50% then flick idle-up. Part of my problem was that when I flick throttle hold, my tx uses the 'normal mode' curves by default. But it means there's no chance of me taking off in the wrong mode by accident.

K

A bit like a kite, but 500 times more expensive
10-01-2007 Over year old.
 
 
BJames111
Elite Veteran
Location: Billings, Montana

stationary flip, right on the deck! Crashed it. I have done a loop in normal mode, works fine for a fast power on loop.

Brian James
Miniature Aircraft Fury Extreme
G-Force Heli
Elevated R/C
10-02-2007 Over year old.
HOMEPAGE  
 
 
gaanel
Senior Heliman
Location: Greenville, SC

Yes

My first crash was from not going to Idle Up 2. I had just put new blades and a new muffler and I was retuning the engine. I was going up, testing it, then bringing it back down to change the needle valve. When I thought I had it right I went up and decided to go inverted. Fortunately I was pretty high and I thought the engine had just cutout. So I flipped it back over and put in full down to get the blade speed up (I thought maybe I had lost blade speed being inverted and flipping it back upright) as I approached the ground I opened the throttle back and the thing jumped back to life and scared the heck out of me so I inadvertantly cut throttle then opened it again and landed. It would have been an ok landing but the new blades hit the ground. Very minor damage, about $30.00 worth (new flybar and main shaft). I kept using the blades, they were carbon and never seemed damaged and I flew them much after that.
Gary

Member of the "Light Side"
10-03-2007 Over year old.
 
 
d brooks
Heliman
Location: North Plains, OR USA

i went to do an inverted departure one day and quickly figured out i was going to run out of AAI. (Altitude, Airspeed, and Ideas) i rode it out as the head and tail blades were skimming the stuble in the field. It reminded me of a damn playing card on a glass table-top. It retained enough energy to get upright and the headspeed came back up as it was dropping stuble!

Now i ALWAYS check the idle up switch position!

dMb

"The world's a big place, people just travel in small circles."
10-04-2007 Over year old.
 
 
eastbayfalcon
Heliman
Location: Concord, CA

Bummer...

I think everyone has done that maneuver at least once. I know when i don't fly consistently I do it all the time. The most important thing is not to panic, zero the pitch and hit idle up as soon as you hear it bog. You should always be able to save it as long as you don't panic.
10-04-2007 Over year old.
 
 
eyeflyhelis
Elite Veteran
Location: charlotte nc

heck sometimes i fly in normal mode and do big loops and rolls, just got to remember not to hold inverted to long.

only you have the power to make no difference!
10-05-2007 Over year old.
 
 
Altrex
Senior Heliman
Location: WI

sorry to say

I have done it twice
10-15-2007 Over year old.
 
 
wrobijns
Senior Heliman
Location: Swalmen, the Netherlands

Been there, Did that.

I flew in the sun and lost orientation.
When I saw it again it was inverted.
But I was still in the wrong mode.
It slowly when to the ground. I was learning inverted then and was not bright enough to switch flymodes.
An inverted landing, did not even break the blades
Just a bent shaft, flybar and tail.

Walter Robijns, 3D rules !!!
10-16-2007 Over year old.
HOMEPAGE  
 
 
Zaneman007
Key Veteran
Location: Texas - USA

I have completed more than one flip in normal mode.

But then there were those two occasions where I was not so successful(lucky).

I'd rather be flying
10-16-2007 Over year old.
 
 
cookie monster
Senior Heliman
Location: Los Angeles

I did it today but the heli was nice and high so i saved it... had to smoke a cig after that because I was shaking

Miniature Aircraft fury extreme 90 710 radix Y.S 91
10-16-2007 Over year old.
 
 
cbhelo
Heliman
Location: GA

Normal mode is evil
Idle up is good
I match all my flight modes and as soon as the governor kicks in, I go to idle-1 up on ground... Why bother with Normal at all unless you are scale flying?

Of course warn anyone who flies your chopper... They could do some massive damage if they do a 'chop the throttle' in normal mode with full linear flight curves...
10-17-2007 Over year old.
 
 
Madbob9
Heliman
Location: So Cal.

Just program your tx with a flat 50% pitch curve in normal.The problem is solved.
10-17-2007 Over year old.
 
 
cbhelo
Heliman
Location: GA

Nice so you can't take off hehe.. Now there is a solution!
10-17-2007 Over year old.
 
 
michael88997
Key Veteran
Location: northern texas, us

i always flip into idle up on the ground and then put negative pitch just to make sure... i learned that from most pros ive seen
10-17-2007 Over year old.
 
 
luz_husband
Heliman
Location: kentucky

been there, done that. my last bad crash was from the same thing, started a low flip, went negative with the stick only to find out i was still in normal mode...ouch.
10-17-2007 Over year old.
HOMEPAGE  
 
 
buster1
Senior Heliman
Location: Manhattan, NY

Done it myself one time - once it all it takes to make sure you don't do it again. Its all part of the fun.
10-17-2007 Over year old.
 
 
wlfk
Veteran
Location: uk

It's interesting how many people have done this. Enough good helis lost that... 'normal mode' ceases to look like a good idea (to me). But having done it myself, you're all making me feel slightly better.

Just for the sake of argument, I prefer to have a throttle curve of:

0-60-20-20-20

for 'normal' mode with linear pitch curves. It means that when you're spinning up, you naturally tend to leave the heli with slight negative pitch at the point where you flick on idle-up. You can just about check tracking on 20% throttle (at least preliminary checks). I keep the linear pitch curves in order to help me if I need to setup the head.

If you have a flat 50% pitch cuve, my concern is that you might flick on idle-up whilst you still have a smidgeon of positive pitch.

K

A bit like a kite, but 500 times more expensive
10-17-2007 Over year old.
 
 
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