Author Topic: IS-1 Sęp **DONE!**  (Read 802 times)

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Offline TheChronicOne

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Re: IS-1 Sęp
« Reply #15 on: January 07, 2019, 11:02:07 am »
Yeah, aren't you meant to LOOK at the ailerons when you move the stick during the pre-flight?

When we do that at my gliding club we always yell out 'Right!' when moving the stick to the right and the observer calls out which way the ailerons move.

(It's almost impossible to see the surfaces from the cockpit on most sailplanes, your eyes are at the same level as the wings....)

This type of thing seems to be a contributing factor more times than not.... a lackadaiscal approach to pre-flight. Other things happen, too, but I keep reading stories about things that could have EASILY been caught on the ground. Just yesterday read up on an SAS Mad Dog that lost BOTH engines completely within 78 seconds of rotation. Ice on the upper wing broke loose and were ingested. This is SAS, too, at their home airport...  still didn't catch it. Other things went wrong but once again if pre-flight had be done properly, the whole thing could have been avoided.
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Offline TheChronicOne

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Re: IS-1 Sęp
« Reply #16 on: January 20, 2019, 04:34:54 pm »
OK. Big time wing fitment problem on starboard side. I sorted it. Glued all the wings on, did a little filler in the seams and sanded it. Have no primer but this red paint says it comes with it. We'll see how it goes! So anyway... I painted it. I'll likely have to do some more PSR but we're moving along nicely now!

Still no clue what type of paint scheme to put on it but something will come up I'm sure.

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Offline Weaver

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Re: IS-1 Sęp
« Reply #17 on: January 21, 2019, 04:53:52 am »
Lancaster designer Roy Chadwick was killed in a crash in 1947 caused by reversed aileron cables on the Avro Tudor 2 prototype.
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Offline joncarrfarrelly

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Re: IS-1 Sęp
« Reply #18 on: January 21, 2019, 12:27:38 pm »
Lancaster designer Roy Chadwick was killed in a crash in 1947 caused by reversed aileron cables on the Avro Tudor 2 prototype.

"Aileron reversal", like other examples of control reversal, is an aerodynamic
phenomenon and is not the same as physically cross-connected control
surfaces.
"Evil our grandsires were, our fathers worse;
And we, till now unmatched in ill,
Must leave successors more corrupted still."
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Offline PR19_Kit

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Re: IS-1 Sęp
« Reply #19 on: January 21, 2019, 02:33:04 pm »
I think the Tudor accident really was wrongly connected control cables though.
Any aircraft can be improved by fitting longer wings, and/or a longer fuselage

...and I'm not a closeted 'Take That' fan, I'm a REAL fan! :)

Regards
Kit

Offline TheChronicOne

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Re: IS-1 Sęp
« Reply #20 on: January 21, 2019, 02:45:51 pm »
Lancaster designer Roy Chadwick was killed in a crash in 1947 caused by reversed aileron cables on the Avro Tudor 2 prototype.
Such a shame to lose a man, and that talent due to a "silly" mistake.   :-\
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Offline Weaver

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Re: IS-1 Sęp
« Reply #21 on: January 21, 2019, 05:03:08 pm »
Lancaster designer Roy Chadwick was killed in a crash in 1947 caused by reversed aileron cables on the Avro Tudor 2 prototype.

"Aileron reversal", like other examples of control reversal, is an aerodynamic
phenomenon and is not the same as physically cross-connected control
surfaces.

Aileron reversal usually happens near the aircraft's maximum structural design speed where aerodynamic forces acting on the ailerons bend the wing instead of rolling the aircraft, the result being a roll in the opposite direction. The Tudor 2 crash happened immediately after take-off, at nowhere near maximum speed, and was absolutely and definitely traced to the ailerons being connected to the controls the wrong way around. The aircraft had been worked on overnight and a system of chains connecting control column to the ailerons had been disconnected and reconnected in the process. During pre-flight, the pilot, who couldn't see the wing tips from the cockpit, had relied on shouting 'ailerons' to a crew member in the rear cockpit who could see the wingtips through the windows. Unfortunately, what he couldn't see from there was which way the pilot was moving the control column. The aircraft didn't burn and the incorrectly connected chains were discovered during the subsequent investigation.

Also killed was Avro chief test pilot Bill Thorn as well as several others, and the crash came within a hair's breadth of claiming Avro Managing Director Sir Roy Dobson, who was actually seated on the plane when he was called away for an urgent phone call at the last minute!

Source: AVRO - The History of an Aircraft Company by Harry Holmes
« Last Edit: January 21, 2019, 05:25:20 pm by Weaver »
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Re: IS-1 Sęp
« Reply #22 on: January 22, 2019, 01:53:34 am »
I knew i'd read somewhere recently about control reversal - It was in The Quest for Speed by Mike Roussel

The Short Crusader was a Schneider Trophy contender powered by a Bristol Mercury.  It was dismantled and shipped to Venice for the 1927 competition to be used as a practice aircraft.  After reassembly Flying Officer H.M.Schofield took off in the aircraft: since the aircraft with full fuel load was heavy on takeoff, he held the aircraft close to the water to build up speed. It is probable that the aircraft encountered a thermal caused by the hot weather, for suddenly the right wing lifted. Schofield attempted to correct this, but the control wires to the ailerons had been crossed during reassembly, so that the aileron movement was reversed. The aircraft continued the roll, and hit the water at a speed of 150 mph (240 km/h). The fuselage broke in half at the cockpit and Schofield was thrown clear, sustaining serious bruises but no broken bones. The aircraft sank into the lagoon and was recovered a week later, when examination of the wreckage clearly established the cause of the crash.
(Italic text quoted from Wikipedia)

Fred

Another ill conceived, lazily thought out, crudely executed and badly painted piece of half arsed what-if modelling muppetry from zenrat industries.

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Offline TheChronicOne

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Re: IS-1 Sęp
« Reply #23 on: February 02, 2019, 01:36:34 pm »
This thing is back on track and all the putty work is finished. I'm going to put another coat of primer on it before I actually paint it, however.. but we're moving forward again!

I still don't know how I'm going to paint this, really... all I know is I want red.  I think I might try something goofy like draping it with netting and spraying a bit of black or something.... we'll see!

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Offline Tophe

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Re: IS-1 Sęp
« Reply #24 on: February 02, 2019, 08:09:43 pm »
not finished but already good... :thumbsup:
[the word "realistic" hurts my heart...]

Offline TheChronicOne

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Re: IS-1 Sęp
« Reply #25 on: February 03, 2019, 05:16:13 pm »
Thanks, homie!  We'll be sailing in no time.

I've got the red paint on and it worked very well this time....  next is to mask some things and think about how to add some interest to the paint job.
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Offline TheChronicOne

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Re: IS-1 Sęp
« Reply #26 on: February 06, 2019, 03:34:55 pm »
Experimenting a bit with the paint job. NO CLUE how this will turn out but I'm sure it'll either look really neat, or look really bad!  ;D ;D

It's red now, I'm going to hit it with black next.

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Offline TheChronicOne

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Re: IS-1 Sęp
« Reply #27 on: February 12, 2019, 02:40:12 pm »
All done.
























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Re: IS-1 Sęp **DONE!**
« Reply #28 on: February 13, 2019, 01:39:20 am »
 :thumbsup:
Fred

Another ill conceived, lazily thought out, crudely executed and badly painted piece of half arsed what-if modelling muppetry from zenrat industries.

"...the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible.

Offline Old Wombat

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Re: IS-1 Sęp **DONE!**
« Reply #29 on: February 13, 2019, 07:39:27 am »
Fantastic job, Brad! :mellow: :thumbsup:
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