Manual Graupner MC 22S (page 149 of 180) (English)

467112

149

Zoom out

Zoom in

1/180

149

Programming examples – Fixed-wing models

ted, then a mixer has to be set up which deﬂ ects the

ailerons slightly to the left. Heading changes around

the lateral (elevator) axis can be corrected in a similar

way using a mixer acting upon the elevator:

a) Correction around the lateral axis (elevator)

LinearMIX 3: „RU  EL“

Asymmetrical setting. The exact values required

must be found by ﬂ ight testing.

b) Correction around the longitudinal axis (aileron)

LinearMix 4: „RU  AI“

Asymmetrical setting. The exact values required

must be found by ﬂ ight testing.

In most cases relatively small mixer values are called

for, typically below 10%, but this does vary from mo-

del to model. If you use one of the curve mixers 5 or

6, the mixer ratios can be adjusted even more accu-

rately to match different rudder deﬂ ections. Again, no

deﬁ nite values can be stated, as they vary for each

model.

Vertical climb and descent

Many models exhibit a tendency to deviate from the

ideal line in vertical climbs and descents.

To correct this we need an elevator centre position

which varies according to the throttle setting. For ex-

ample, if the model tends to pull out of a vertical de-

scent by itself when the motor is throttled back, slight

down-elevator must be mixed in at this throttle setting

using a “C1  EL” mixer.

This can be achieved in either of two ways: using

the pre-programmed “Brake  Elevator” mixer in the

»Wing mixers« menu – in which case you must not

forget to move the “brake offset” to coincide with your

throttle minimum position in the »Model type« menu.

Alternatively you could program a free mixer. If all the

free mixers are in use, you can use the “CurveMIX 5”

mixer as a linear mixer to achieve this function.

As a rule you will need to set mixer values below 5%,

but once again there is no substitute for test-ﬂ ying.

Rolling (movement around the longitudinal axis)

at idle

When you reduce the throttle setting, the model may

tend to roll slightly in one direction. Clearly an aileron

correction has to be made.

However, it is much more elegant to let a “C1  AI”

mixer correct this effect than to move the stick manu-

ally. Here again, a curve mixer is recommended, e.g.

“CurveMIX 6”, which is again programmed as a linear

mixer, albeit this time with a very small mixer ratio.

The adjustment process should only be carried out

in calm weather. Often all you need to do is apply the

mixer in the control segment between half-throttle and

idle. To achieve this, set one reference point in the

centre of the stick travel.

Rolling when ailerons and ﬂ aps are extended

If you ﬂ y the landing approach with both ailerons de-

ﬂ ected up, the model may show a tendency to roll

slightly due to minor variations in aileron servo travel

(or constructional inaccuracies). The model may turn

to either side by itself. Once again, this tendency can

easily be corrected using a “C1  AI” mixer to vary

the compensation according to the position of the ai-

lerons / landing ﬂ aps.

If you are using the pre-programmed »Wing mixer«

“Brake  3 Elevator” to correct the fault described in

the left-hand column under the title “Vertical climb and

descent”, you can still use CurveMIX 5.

You must provide a means of switching the mixer on

and off using the external switch which controls the

aileron / landing ﬂ ap function. The mixer therefore

only has any effect when the aileron / landing ﬂ ap

function is activated. The correct value must be found

through test-ﬂ ying.

Summary

The settings described on this page are intended pri-

marily for the expert ﬂ yer who needs an F3A aero-

batic model which ﬂ ies with absolutely accurate, neu-

tral control response.

Please bear in mind that reﬁ ning the ﬂ ying characte-

ristics of a model to this extent involves tremendous

effort, time, sensitivity and expertise. Some experts

continue the programming procedure even when they

are ﬂ ying. It is not advisable to try this if you are just a

moderately advanced pilot making your ﬁ rst attempt

with an F3A aerobatic model. You would be well ad-

vised to request help from an experienced pilot, and

carry out the ﬁ ne-tuning adjustments mentioned here

one by one, with the expert at your side, until your

model exhibits the neutral ﬂ ying characteristics you

are aiming for. At this point, when your model is ﬂ ying

perfectly, you can forget all about trimming, and con-

centrate on ﬂ ying the aerobatic manoeuvres themsel-

ves, which are not necessarily easy to ﬂ y well.

Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

Forumrules

To achieve meaningful questions, we apply the following rules:

First, read the manual;
Check if your question has been asked previously;
Try to ask your question as clearly as possible;
Did you already try to solve the problem? Please mention this;
Is your problem solved by a visitor then let him/her know in this forum;
To give a response to a question or answer, do not use this form but click on the button 'reply to this question';
Your question will be posted here and emailed to our subscribers. Therefore, avoid filling in personal details.

new questions and answers
new manuals

You will receive an email to register for one or both of the options.

Get your user manual by e-mail

Enter your email address to receive the manual of Graupner MC 22S in the language / languages: English as an attachment in your email.

The manual is 3,84 mb in size.

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.

Info

Graupner MC 22S Manual

Product: