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HomeScaleAircraftHelicopterScale Model RC Helicopters › eCobra / Swift 16 Build
01-13-2009 04:21 AM  9 years agoPost 401
WrenFlyer

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Mississippi

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Looks real good, I would leave the landing gear alone! Very Nice!! Also I would sheet the tail and add the backbone (1/2" Square stock) .. this adds a great deal of strength to the tail before you fly her. Just to be on the SAFE side!

Dr.Tim
Will do! Looks like it'll be later this week when my extension wires get here, so I'll have a few nights to sheet the tail.

Mr. Haney

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01-13-2009 04:35 AM  9 years agoPost 402
Seaviper

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Central MS

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I agree about sheeting the tail and adding the backbone. I was going to tape the drive shaft cover in place but thought better of it.

Alan my pack is a 5s 1p 5000 Flightpower. Where your ESC is, I put my RX and regulator. My rx batt (Duralite 2s1p 2100 li ion) is back behind the rearmost landing gear mounts. I have to make an extension to reach the front for charging the rx pack.

The 620Se has a different setup than the 16. I was hoping to mount my battery like yours. However, the tray I made works nicely. I could accomodate a 6s pack I think. The 5s works beautifully though.

Noticed one of my struts was out of alignment with the others. Ended up breaking it while trying to undo a thin CA glue joint. Ordered a new set from Dr Tim. While I am grounded, I will tidy up some wiring and start glassing some components.

Still need to build the chin block and weapons, add wire cutters and antennas, etc. All the fun stuff

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01-13-2009 04:42 AM  9 years agoPost 403
WrenFlyer

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Mississippi

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my pack is a 5s 1p 5000 Flightpower. Where your ESC is, I put my RX and regulator. My rx batt (Duralite 2s1p 2100 li ion) is back behind the rearmost landing gear mounts. I have to make an extension to reach the front for charging the rx pack.
I was thinking about mounting my RX pack just as you described. I'm still going to mount my Rx up front like I did earlier. Looks like I'm a week or so for first flight now, you've got me pumped now!

Mr. Haney

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01-13-2009 04:43 AM  9 years agoPost 404
WrenFlyer

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Mississippi

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Patrick, is your exhaust made from the plastic cups? Or cast resin?

Mr. Haney

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01-13-2009 04:53 AM  9 years agoPost 405
Seaviper

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Central MS

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The exhaust looks like a vac molded part to me. Polystyrene maybe?

I am going to add an IR blanket to the exhaust and some small details around the exhaust area. Looks good enough for me.

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01-13-2009 05:45 AM  9 years agoPost 406
Dr.Tim

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Mojave Desert

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The origanal molds were those cups, we decided that these cups were more scale because of the ridges in them. Also they hold up better and are easier to cut.

Dr.Tim

From Simple minds come simple ideas! Approach Engineering

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01-13-2009 06:31 AM  9 years agoPost 407
reinhpe

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Vienna, Austria

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Now to something completely different:
I did browse all my Cobra photos I have and could not find one where I could see a landing light for the Cobra! Where is it mounted - inside the Fuse?
Maybe one of you has some detailed shots, thanks in advance,

Peter

Logo 500, Z-Power, Kontronik Jive, BLS Servos & GY 401,
Hirobo Quark
e-Cobra (w.i. progress)

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01-13-2009 12:19 PM  9 years agoPost 408
reinhpe

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Vienna, Austria

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Cause there was a question about Microballons a few posts ago, I would like to show some shots of that stuff:

Here you see a cup of microballoons, add as much to your resin mixture to get it as thick as you like! Now apply it (I use a wooden stick with a rounded top) to the place where you need it! I don't say how this mixture of resin and microballoons looks like, see yourself!

Peter

Logo 500, Z-Power, Kontronik Jive, BLS Servos & GY 401,
Hirobo Quark
e-Cobra (w.i. progress)

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01-13-2009 01:32 PM  9 years agoPost 409
Dr.Tim

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Mojave Desert

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Here is a couple shots of my Turbine Cobra at IRCHA 2004 .. The landing light is on the skid strut ..

From Simple minds come simple ideas! Approach Engineering

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01-13-2009 02:00 PM  9 years agoPost 410
Pistol Pete

rrProfessor

Seffner, FL

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K U D O S!

Been looking forward to video...and over water to boot!

********

FWIW...
As for a little shake on the swift, after a full spool up, I just broke out my pocket knife and scored a line onto the plastic end of the main blade along one side of the main blade grips. Folded blades and brought back to this line and that little shake before blades set is gone.

~~Enjoying the hobby one flight at a time~~

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01-13-2009 02:10 PM  9 years agoPost 411
WrenFlyerrrVeteran - Mississippi - My Posts: All  Forum  Topic

Now to something completely different:
I did browse all my Cobra photos I have and could not find one where I could see a landing light for the Cobra! Where is it mounted - inside the Fuse?
Maybe one of you has some detailed shots, thanks in advance,

Peter
Here's another shot, I've seen several in this location.

Mr. Haney

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01-13-2009 02:45 PM  9 years agoPost 412
reinhpe

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Vienna, Austria

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Thank you very much! I think my mini Maglite has to die...

@ Dr. Tim: Wow, Turbine Cobra! Maybe when I am retired...

Peter

Logo 500, Z-Power, Kontronik Jive, BLS Servos & GY 401,
Hirobo Quark
e-Cobra (w.i. progress)

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01-13-2009 06:36 PM  9 years agoPost 413
jimmyjo

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Champaign, IL USA

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I have been following this thread almost from the beginning and want to thank you all for the photographs and wonderful information. It has been a big help. I have 2 things to mention.

First, I hate to use the resin and even epoxy to do the fiberglassing so I just tried using Polycril (water soluble polyurethsne) and the .6oz figerglass cloth from Midwest and it was very easy and non-messy to use. Easy to use, doesn't smell bad, easy cleanup. It is also pretty fast. I was able to do the entire heli at one setting.
It doesn't however, seal the weave nearly as well as resin or epoxy. I used some filler primer from Auto Zone and two coats of that smoothed everything right out and I have to think that it is lighter than the resin or epoxy.

Second: Does anybody know what the spring in the kit is for? It is about 1" long and tapers from about 1/2" to 1/4" and I don't see it mentioned in the manual.

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01-13-2009 06:39 PM  9 years agoPost 414
WrenFlyer

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Mississippi

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Second: Does anybody know what the spring in the kit is for? It is about 1" long and tapers from about 1/2" to 1/4" and I don't see it mentioned in the manual.
That goes on the dowel that attaches to the cannon assy. It goes between the fuselage and the arm that is used for the servo connection.

Mr. Haney

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01-13-2009 06:52 PM  9 years agoPost 415
Dr.Tim

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Mojave Desert

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The Gun, It holds tension on it allowing it to move up if hit.

Dr.Tim

From Simple minds come simple ideas! Approach Engineering

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01-13-2009 10:53 PM  9 years agoPost 416
jimmyjo

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Champaign, IL USA

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Now that whole system makes sense to me. Thanks. Jim

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01-15-2009 10:51 PM  9 years agoPost 417
reinhpe

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Vienna, Austria

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Split Doghouse and transmission bay
I would like to show you a very interesting modification a colleague from Germany (Michael Baer) has done during his Cobra built! To have an easier access to the Rotorhead he did split the Transmission bay and the doghouse. Some pictures will show you the 'how-to' I asked for allowance to post the pictures here in this forum and he gave me the OK!

On the first photo you can see the divided Transmission bay. Next the doghouse, which was cut carefully by scissors. Now the top cover of the Doghouse and how he used two small stripes of Balsawood to align the halves!

Second part follows!

Peter

Logo 500, Z-Power, Kontronik Jive, BLS Servos & GY 401,
Hirobo Quark
e-Cobra (w.i. progress)

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01-15-2009 10:56 PM  9 years agoPost 418
reinhpe

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Vienna, Austria

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Split Doghouse & Transmission bay
Now we come to the part of the modification, where he used some tristock in the doghouse and some tiny screws to fix it.

I think, it is a very interesting approach and gives you the ability, to work on the swashplate & Rotorhead without unmounting it!

Peter

Logo 500, Z-Power, Kontronik Jive, BLS Servos & GY 401,
Hirobo Quark
e-Cobra (w.i. progress)

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01-16-2009 12:07 AM  9 years agoPost 419
DogWood

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Bend, OR. USA

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very interesting, although I think using some small rare earth magnets might be nicer, then you wouldn't have the screws sticking out.

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01-16-2009 12:49 AM  9 years agoPost 420
sliderx

rrApprentice

Meteghan,Nova Scotia, Canada

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I split mine a different way so I could get at the servos better, will better for me anyway.

Raptor 50 V2

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HomeScaleAircraftHelicopterScale Model RC Helicopters › eCobra / Swift 16 Build
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