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TOPIC: Petiterina

Petiterina 21 Sep 2016 07:44 #16

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Thanks Q, 0.0175" will do just fine! As a matter of interest, all my micrometers are imperial and I still think in imperial units. I draw in metric, though, as the maths is easier when scaling.
Too much thrust is never enough!
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Petiterina 21 Sep 2016 12:50 #17

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Flew the Petiterina again this morning in pretty calm air.
Played with the gyro to explore the differences on & off. The gain is set at 50% on all axes.
The gyro does seems to take the edge off 'maximum deflection' aerobatics and it makes it glide a tiny bit faster at the same trim setting but in all other respects it works extremely well.
The continuous vertical climb is much easier with the gyro on - you really don't have to do much at all! - and it also allows a rock steady 'parachute' type descent at a ridiculously low forward speed.
At about this stage I usually find things that I would like to change but apart from a new spinner I simply can't see anything!

If i was to build it again and at this size I think the wing section is thick enough it could be made just from Depron which would considerably simplify the construction.
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Petiterina 22 Sep 2016 10:54 #18

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Still calm but rather damp under foot so the Petiterina got another outing this morning.
With the gyro 'on' it feels very secure allowing some rather alarming "low slow" manoeuvres as well as a sustained vertical climb.

The final glide approach and landing well demonstrates its 'benign' slow speed handling - courtesy of the gyro! ;)
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Petiterina 07 Jun 2018 12:52 #19

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Slowly putting the Depron 'Petiterina' (3/4 size Ballerina) back together after the 06 June 18 "lawn dart" episode.
To recap.
The right wing was detached at the root but retained by the aileron servo wire
The fuselage was detached just behind the cockpit but retained by the elevator and elevator servo sires
The tail plane and fin were detached from the fuselage but retained by the servo link rods.
The prop was broken
The nose completely crushed up to the U/C mounting.
The scale printed 9 cylinder radial had a cylinder knocked off.
On the plus side all the electrics still worked!
.
New bits printed for the radial.

If you look carefully the new cylinder and head also have rather closer (nearer scale?) fin spacing.
The wing and fuselage are simply glued back together with some local joint reinforcing - one of the benefits of foam!
The crushed nose with the motor and radial disconnected.

After cutting back to sound material the fuselage rebuild starts.

At least once you can see positive repair progress the annoyance of the crash starts to fade. :)
Last Edit: 07 Jun 2018 12:53 by Quorneng.
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Petiterina 07 Jun 2018 17:52 #20

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Quorneng wrote:
Slowly putting the Depron 'Petiterina' (3/4 size Ballerina) back together after the 06 June 18 "lawn dart" episode.
To recap.
The right wing was detached at the root but retained by the aileron servo wire
The fuselage was detached just behind the cockpit but retained by the elevator and elevator servo sires
The tail plane and fin were detached from the fuselage but retained by the servo link rods.
The prop was broken
The nose completely crushed up to the U/C mounting.
The scale printed 9 cylinder radial had a cylinder knocked off.
On the plus side all the electrics still worked!
.
New bits printed for the radial.

If you look carefully the new cylinder and head also have rather closer (nearer scale?) fin spacing.
The wing and fuselage are simply glued back together with some local joint reinforcing - one of the benefits of foam!
The crushed nose with the motor and radial disconnected.

After cutting back to sound material the fuselage rebuild starts.

At least once you can see positive repair progress the annoyance of the crash starts to fade. :)
That's true .Well done
Anything will fly give n enough power
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Petiterina 07 Jun 2018 18:42 #21

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Although annoying to repair, less work than a balsa repair. Could call it the "phoenix" it has sort of risen from the Ashes.
:woohoo:
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Petiterina 07 Jun 2018 21:48 #22

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O.T. Why did you repeat all of Q's post, with photo's, for a four word comment? :P
if you are calm and collected when all about you are going berserk - you've missed something important!
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Petiterina 07 Jun 2018 23:14 #23

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The major structural bits added to mount the engine bulkhead along with the ESC.

With this done the remaining structure and skin just has to cut to size and glued in.
Whilst I was at it I have added a bit of down thrust angle to the bulkhead so hopefully I won't need to fiddle about with a throttle/elevator mix!
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Petiterina 08 Jun 2018 05:22 #24

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Eric It was a quick quote is all. Sorry if I offended
Anything will fly give n enough power
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Petiterina 08 Jun 2018 08:26 #25

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John, if you use reply not quick reply it will not include all the quote in your reply.

Tony B
as René Descartes said. " i build therefor i am "
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Petiterina 08 Jun 2018 15:47 #26

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Nearly there!
The motor installed, all the skin repaired and the 9 cylinder painted.

Just the retaining magnets for the battery hatch and a bit of blue paint and it will be done! :)
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Petiterina 10 Jun 2018 21:17 #27

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Repairs complete. :)

The battery hatch is complete too but the paint was still wet so it could be put in position.
Re-maiden tomorrow if the weather holds!
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