BME 5.8 (Standard) Initial Flight Report.

The motor was started using the ignition on, choke on, flip tell it fired method, then choke off and flip tell it started, 5 flips, no problems.

The idle was as you would expect from a gas motor with electronic ignition, low and stable.
The high end was checked and the fuel settings deemed close enough for an initial flight.

At this point it was obvious that the motor was very smooth from a vibration point of view.
Taxing out to the runway provided no problems, the power is very linear which makes for drama free ground handling.

Once lined up on the runway, advancing the throttle to full, the first thing I noticed was the way the motor accelerated with out the tendency to have to clear first, a common occurrence with several well known twins on take off, it just went directly to full power. Off to a good start.

As the throttle was reduced to med for a procedural turn, the motor started to gurgle so I continued around and landed.
The low and top where leaned very slightly and after getting lined up again, take off. As before, no clearing, just instant full power.

This time the motor ran smoothly with out a tendency to gurgle when unloading in normal flight.

The first flights went off with out a hitch, just normal "Pattern" type flying to give the motor a chance to set in a bit.

After 3 flights, the cowl was removed and all the bolts and wiring checked, no problems.

So, how will it run with a bit more stress ??..

Sequence:

Full power take off, immediate roll to Knife Edge, immediate Knife Edge snap, 1/4 roll to inverted, 1/2 roll to up right.
Motor was at full throttle, no gurgling, spitting or misfiring, no power deviation at all.

Pull to vertical, 1/2 roll, 1/2 roll, five points of a four point roll ( motor at full throttle, clean and solid).

Push to level, across box, ( reduce throttle to half, no gurgling ) 1 1/2 pos snap, pull to vertical down line ( reduce throttle to idle, no problems ).

(Increase throttle to 1/4, still no issues) 3/4 pos snap followed by 1/2 roll, pull to level ( 1/2 throttle, motor didn't hiccup through snaps or 1/2 roll ).

( 1/2 throttle ) 6 point's of a 4 point roll ( No change in motors running characteristic ) push to half loop ( full throttle ) followed by 1 1/4 positive snap to Knife Edge ( 1/2 throttle ) 3 of 4 point to up right, ( go to idle ), plane slows, push to inverted flat spin ( raise throttle a click or two ).

( Back to idle ) exit flat spin with full roll and pull to level.

( 1/2 throttle, no gurgling ) pull to 45% up line, ( full power, no gurgling ) 1 1/4 neg. snap to Knife Edge, 3 of 4 point to up right.

Pull over the top to inverted level ( throttle back to idle ), enter inverted Elevator ( throttle to 1/8), roll to upright Elevator, initiate rudder to Elevator spin.

(slowly increase throttle ) enter torque roll from Elevator ( motor shows really nice throttle resolution here ).

Three turn torque roll ( 1/2 throttle ) then accelerate up 100 ft ( full throttle ), stop ( momentary idle), into a waterfall ( 3/4 throttle, no hesitation ), exit Waterfall in full stall Knife Edge ( 1/4 throttle, no gurgling ), full stall Knife Edge pos snap to Knife edge ( no change in motor ), neg. full stall shoulder roll to Knife edge ( still 1/4 throttle, still no sign of gurgling ), 3/4 full stall roll to inverted ( Boring, no motor problems ), push to vertical ( 3/4 throttle, instant response ), push again to level ( reduce throttle to just above idle ), enter Elevator ( throttle 2 clicks of idle ), 1/4 roll to Knife edge Elevator ( same throttle ), 1/4 roll to Inverted Elevator, 1/4 roll to Knife Edge elevator, 1/4 roll to up right elevator, 1/4 roll to Knife Edge elevator and go to full throttle, clime out in Knife edge. Etc.

Observations:

This was the first day of flying with this motor, a total of nine flights where made at two clubs.
The motor was extremely easy to adjust to get to run well and when adjusted, it does indeed run well.
It shows none of the midrange gurgling tendencies common in twins and has really good power potential.
Starting the day 300 RPM down on the Q100, it ended the day just 100 RPM down. With the way motors run in, I suspect it'll be on par with the Q100 which would mean 6,200 to 6,500 ( weather dependant ) with a Menz Standard 26-10 prop.

This motor replaced the Quadra Q100 "Aerobatic" in this plane.
A weight reduction of 2lbs was realized and really showed in the way the plane flew, becoming more stable in 3D and more predictable in snap and full stall maneuvers.

Overall, I can honestly say, this is the best motor I have had the pleasure of flying, that includes Quadra, 3W and Brisons.

BM  07-27-98