Re: Yet more MCR01 nonsense

Pilot magazine

Yet more MCR01 nonsense

Rod1 12/11/2009, 4:51 PM
Normal 0

Regarding the article “Dyn Aero MCR01 Club”

On Flaps it states;

“Half flap (30 degrees) is used for takeoff, half or full flap for landing, The flaps could originally have been lowered from the present max of 45 dg to 70 deg, to give a very short landing indeed.”

Take off flap is and has always been 17 deg.

There has never been a 70 deg setting, but the factory max of 45 deg now contains a recently added warning;

4.17. FLAPS: 45° FLAP POSITION

The use full flaps (45° - short landing position) is authorized only on finals for short landings (or emergency landing), and only when no go-around is envisaged.

When the flaps are fully extended (45°) : In the event of a go-around : the throttle must be use with caution, slowly.

Slide-slipping is strictly prohibited. During the final, the aircraft must be maintained in a straight line and without angled attack.

(From the flight manual, available on line at http://fpkit.nexenservices.com/lien/doc_exploitations/versions_cnsk/mcr_club/manuel_vol_100cv/oexno07_20080414.pdf)

The LAA has never allowed 45 deg, reducing it by mandatory mod;

MOD/301/015 Flap deflection reduced to 35 degrees maximum

See LAA TAD for reference;

http://www.lightaircraftassociation.co.uk/engineering/TADs/301A%20%20DYN%20AERO%20MCR%2001%20CLUB.pdf

The article refers to a flap limiting speed of 80kn and a problem with exceeding this on takeoff. The correct flap limiting speed is 89kn with takeoff flap (17deg). See section 4.3 of the flight manual referenced above.

You state that if there is a CS prop and the bat is not on the firewall expect a rear C of G. The CS prop is heavier than the fixed pitch. Rear c of g is a problem with a fixed pitch and rear-mounted batt, but not with a CS prop unless you got the build wrong!

All the above could have been checked on the net in 10 min.

There are other errors, but I will leave them to others to point out.

Rod1

(Builder and owner of an MCR01 Club)

PS if you are wondering about the title, this is unfortunately the third in the series;

Pilot article on Fatal stall in MCR01

http://www.pilotweb.aero/cs/forums/715702/ShowPost.aspx

More MCR01 nonsense

http://www.pilotweb.aero/cs/forums/769994/ShowPost.aspx

Re: Yet more MCR01 nonsense

NickBloom 12/11/2009, 5:07 PM
Rod is quite right on every point and I feel very embarrassed about these errors. The article was sent to Richard Greenwood, who corrected it. I made the corrections, but in the stress of an office move, switching to new computers and a new mainframe, we somehow managed to print the article with the un-corrected text. Our proof reader failed to spot this and so did I. Readers have my un-reserved apology and a correction will appear in the next issue of Pilot. - Nick Bloom.