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Old Apr 10, 2012, 01:20 AM
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eye4wings's Avatar
Ware, herts. U.K.
Joined Sep 2008
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I think we can safely say 'YES!... it does house something Simon!
An area of doubt surrounds the identity of that something though....

Are you about to enlighten us?
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Old Apr 10, 2012, 02:13 AM
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North UK
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Nope - I don't know either Robin ! :-)

I don't remember seeing such a lump on the DC-6 wreck I saw in Cyprus (the left wing was propped up with the underside exposed, so it would have been very visible) - so they may be optional / version specific.
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Old Apr 10, 2012, 05:53 AM
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I suspect actually that this 'lump' is just an aerodynamic refinement to perhaps reduce local flow seperation where the nacelles taper in ?
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Old Apr 10, 2012, 09:00 AM
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eye4wings's Avatar
Ware, herts. U.K.
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By making the pressure gradient steeper locally?
Or bringing the possible separation point further forward?

I have my doubts - but given the paucity of my aerodynamics theory, possible nevertheless.
I think on the whole though I will stand by my earlier suggestion.

It may well (whatever it is) have been introduced in the 6B and your wreck have been an earlier version.

There were a couple of derelict 6s (or were they 4s?) a couple of years ago when I last visited North Weald. If I am passing sometime and they are still there I may have a quick snoop... but no holding of breath now!
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Old Apr 10, 2012, 11:40 AM
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North UK
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Well, I was mistaken - having looked again at the photos of the Cyprus wreck I can see now that it does indeed have the lump / flairing, although it's very subdued and not raised very much above the wing skin level.
It's a shame I didn't know about it when I was there - I could have attempted to see what was under it
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Old Apr 10, 2012, 11:44 AM
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eye4wings's Avatar
Ware, herts. U.K.
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Ah, it seems life is full of missed opportunities. The trick is not to let them dampen your spirits!
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Old Apr 10, 2012, 01:20 PM
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AlexanderB's Avatar
Braunschweig, Germany
Joined Sep 2006
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Originally Posted by eye4wings View Post
Ah, it seems life is full of missed opportunities. The trick is not to let them dampen your spirits!
Perfect!
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Old Apr 15, 2012, 11:44 AM
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Braunschweig, Germany
Joined Sep 2006
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This weekend I had to work unfortunately. But I managed to find some time to sorten out the cabling of the wing. Indeed there are quite some servo cables:

4 x ESC
2 x Flaps
2 x ailerons
2 x landing light servo
1 x sail winch for the main gear

Plus the cables for the nav-light LEDs and landing light LEDs. In order to have the most flexibity with the nav-lights I added a 100mA constant current source per nav-light.

I still have cables for a gear door servo on each side but I am confident I can use the same mechanism I used on the nose gear doors.

I also prepared the Main Bus A (read too much Apollo stuff these days ), i.e. the battery cable that includes also the 150A MUI (voltage and current sensor).

So every cable is identified now and I hope that I can do some RX programming these days. The Jeti RX are programmable. So I can fine tune / align the aileron servos and the flaps servos because I will use only one channel for flaps and one for the ailerons.

Cheers Alexander
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Old Apr 15, 2012, 12:37 PM
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egras14's Avatar
United States, FL, Fort Lauderdale
Joined Apr 2003
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Wow!Niceley done.Are you making a wire diagram as you go along?
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Old Apr 15, 2012, 12:48 PM
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AlexanderB's Avatar
Braunschweig, Germany
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Originally Posted by egras14 View Post
Wow!Niceley done.Are you making a wire diagram as you go along?
Thank you. Yes I will have such a diagram.
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Old Apr 15, 2012, 12:57 PM
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Israel, Jerusalem
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Can you expand a bit more on the Jeti RX and how it is programable?
Thanks
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Old Apr 15, 2012, 01:20 PM
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Braunschweig, Germany
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Quote:
Originally Posted by S_YORAM1@BEZEQIN View Post
Can you expand a bit more on the Jeti RX and how it is programable?
Thanks
Well, I think this is a wide field. Let me see...

The main principle is that first of all each output pin of the RX is assigned a channel of the TX. For the flaps you have two output pins (eg 9+10) which both are assigned to channel 6. So you have to learn that the output pins of the RX must not necessarily have anything to do with the channel. Of course the factory standard is the output pins are connected with the channels: pin 1 = CH 1, pin 2 = CH 2, pin 3 = CH 3 etc.

Then you can program some settings per output pin. You can for instance reverse a servo that listens to the same channel. In my DC-6 flaps design the servos are mounted symmetrically, i.e. if they would follow the same CH one would go up while the other goes down (like Ail).

You can also trim (center) each output pin or program a delay for the pin (flaps may move slowly).

There are some more options but I would say this is the most important part.

Cheers Alexander
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Old Apr 15, 2012, 03:26 PM
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Israel, Jerusalem
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Thanks for the explanation. Do they have a web site?
BTW - I am subscribed to your project and read avidly all what you do.
Yoram
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Old Apr 15, 2012, 03:41 PM
Go FASST or go home...
Ben_E's Avatar
Bergen, Norway
Joined Nov 2002
3,130 Posts
Quote:
Originally Posted by S_YORAM1@BEZEQIN View Post
Thanks for the explanation. Do they have a web site?
BTW - I am subscribed to your project and read avidly all what you do.
Yoram
http://jetimodel.com/index.php?page=...=0&category=67

Ben_E
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Old Apr 15, 2012, 04:19 PM
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Braunschweig, Germany
Joined Sep 2006
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Quote:
Originally Posted by S_YORAM1@BEZEQIN View Post
Thanks for the explanation. Do they have a web site?
BTW - I am subscribed to your project and read avidly all what you do.
Yoram
Thank you for your interest in my project. Ben already posted the link to Jeti.

Cheers Alexander
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