Building the Guillows B-25 (26.5" span, now 31") with RC and brushless motors.

[electroflyer]

  Great work Frank!

[Frank v B]

Thanks guys.  It was a fun build.  Tonight I will start the post on building the Guillow's DC-3 with a huge 34.5" wingspan.  Motors will be E-Flite 280's.  I ordered the ESC's today.  I already have the motors.

Frank

[Andy Hoffer]

Thanks guys.  It was a fun build.  Tonight I will start the post on building the Guillow's DC-3 with a huge 34.5" wingspan.  Motors will be E-Flite 280's.  I ordered the ESC's today.  I already have the motors.

Frank

Hi @Frank v B

Don't forget to install a sponge crash pad on the floor of your shop to handle any spar-with-innocent-mounted-motor impacts! 

Andy

[Frank v B]

re: my earlier comment "I will use a Berg receiver, essentially an electronic wart on a wire and weighs next to nothing."

For those of you who missed RC's middle ages, below is a photo of a 4 channel Berg receiver next to a quarter.

F.

[Frank v B]

Maiden day: June 13, 2021

Tried 3 times to get it off the ground on our brand new runway.  All 3 times it broke ground and flew nicely but would not gain altitude.  I cut the throttle and ditched it slowly near the apron each time.  Suspect the plane was nose-heavy since full "up" elevator would not allow it to gain altitude.

Will make two adjustments-
i) move the CG back about 3/8"
ii) add more power via props that are about 1/2" greater in diameter.

Frank

[Frank v B]

Made the following adjustments:
- changed the props from 4.0"x2.5" to  4.5"x3"
- changed the servo output arm from a 2 hole to a 3 hole arm.
- swapped the location of the receiver and battery.  The RX is now in the nose, the battery as far back as possible.

Ready for attempt 2.

Frank

[Andy Hoffer]

Hey @Frank v B

Why not just up the ante to 6S? 

Andy

[GuyOReilly]

TEMAC, June 20, 2021.
Photo #36 - @Frank v B fully charged.
Photo #38 - Where does this go?!?
Photo #45 - Two heads are better than one...
Photo #46 - Here we go.
Photo #47 - To please @Andy Hoffer , you can almost see the plane in the bottom right corner - also, I need to clean the lenses...

Video 1st Attempt - https://www.youtube.com/watch?v=lpnnP1oOE30

Video 2nd attempt - https://www.youtube.com/watch?v=6ANQHDKjdVs

Thank you for a fun afternoon.

[Andy Hoffer]

Hey @GuyOReilly

I love the warm and fuzzy UFO's  in photo #47.  People make too much of a fuss about sharply focused images! 

And is that big dog whistle in @Frank v B 's mouth in photo #36?!!

Andy

[Frank v B]

The re-maiden went fine today.

- moved the CG rearward by moving the RX in front of the battery and upgrading the battery to 3S 250 mah from 180
- the prop diameter was increased by 1/2"
- re-set the servo arm to increase the elevator throw and give it more "down".

Did two circuits of the field and then landed with a nose-over.  Airplane in one piece.

Frank

[Michael]

Beautiful little plane!

[Andy Hoffer]

Here is the larger scale model! 

Beautiful flying by @Frank v B !!

Andy