VTOL Halo Pelican? could it be done? - Page 2

JMSTECH · Feb 16, 2009, 02:12 AM

Quote:

Originally Posted by New York Flyer

Hope the advice worked out for you. And yah... they already have that type of system out there. ducted fans or props.

Check this out

VTOL RC model Ultraman Matjyro ãƒ©ã‚¸ã‚³ãƒ³ ãƒžãƒƒãƒˆã‚¸ãƒ£ã‚¤ãƒ (2 min 14 sec)

That is a really nice set up and like the Hyperion BL motors he is using! Too bad this is not something that can be bought off the shelf.

New York Flyer · Feb 16, 2009, 11:14 PM

My thought exactly. Most of these things are overseas. Only thing i seen in the states so far is those quad heli's Everything else has been home made.

I been trying to get an airliner myself, but only thing around is the e-flite 777 that thing is big. I need something smaller.

I guess you can order and have it imported thats probably the only way depends on whats popular i guess.

JMSTECH · Feb 17, 2009, 12:09 AM

Yeah some of the stuff over seas are pretty nice. But this particular jewel you have found looks homemade(?). It's based on an old popular Japanese show from the 70's to 80's. I might have to ask my family more about this or get them to stop by my favorite Hobby Store when they are in that part of the city. http://www.super-rc.co.jp/osaka.html

pakrat961 · Oct 21, 2009, 11:57 AM

I've actually modeled both the Pelican and Hornet in the flight sim X-Plane, and while I love the original idea of an R/C VTOL Pelican, the Hornet is much more practical. Here's a couple videos of the full-size X-Plane models:

Full size Hornet in X-Plane

Full size Pelican in X-Plane

I also have thought about making an R/C version of the Hornet, and in support of that endeavor I scaled down my full-size X-Plane model to an R/C size, just to see how it might handle. Here's a video showing it flying around, testing control response:

R/C size Hornet in X-Plane (~3ft wingspan) (the nacelles aren't animated like the full-size one, but the engines ARE actually vectoring)

I modeled it as realistically as possible; there are NO flight-surfaces, it is controlled entirely with thrust-vectoring (for pitch, yaw and lateral translation) and slight differential-throttling (for roll). Thrust in this X-Plane version is modeled as counter-rotating electric props. This simplifies any adverse-yaw effects that same-direction-props or twin EDFs would introduce.
Obviously this is modeled with some gyro-stabilizers for all three axes of flight.
In the lower-left corner of the screen you can see the control input graphed alongside the stability-correction-response. You can actually get a small IMU designed for robot projects to give you the exact kind of pitch/roll leveling-control seen in this video.
Later in the video you'll see a bunch of lines coming out of the engine-nacelles; this is the thrust downwash, and when visible it shows how I modeled the thrust-vectoring control.

I hope this helps to better understand the Hornet, I've done a lot of research and modeling to get the X-Plane version to behave. If any of you have X-Plane and would like to check out my R/C Hornet, just let me know. It's not posted anywhere, but I'd share it with fellow modelers. :-)

~ Ben
(aka Mid7night, elsewhere on the web...)

Elite · Oct 23, 2009, 03:35 AM

Hey, just a thought... Could you use the pelican’s large fuselage as an advantage by building it out of something very light, 1-2mm depron perhaps? And then stuff it with milar bags filled with helium to carry most of the weight. Though I guess to be able to fit enough helium in there it'd have to be a pretty massive model...

swami · Oct 23, 2009, 08:23 AM

Hmm, you need 1m³ of helium to lift about 1kg.

Dirk.

pakrat961 · Oct 23, 2009, 10:48 AM

If you fill your body with Helium, where does the hardware go?

I don't think you'll get a gain from Helium bags - besides, then you've gotta buy the stuff! One more recurring cost...

I really think the Hornet is doable, and would be a great first-step if you wanted to do the Pelican later.

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Feb 16, 2009, 11:14 PM	#17
New York Flyer flying techy Join Date: Nov 2005 Location: NY Posts: 171	My thought exactly. Most of these things are overseas. Only thing i seen in the states so far is those quad heli's Everything else has been home made. I been trying to get an airliner myself, but only thing around is the e-flite 777 that thing is big. I need something smaller. I guess you can order and have it imported thats probably the only way depends on whats popular i guess.

Feb 17, 2009, 12:09 AM	#18
JMSTECH Registered User Join Date: Dec 2006 Location: Somewhere in Vancouver Island, Canada :) Posts: 2,694	Yeah some of the stuff over seas are pretty nice. But this particular jewel you have found looks homemade(?). It's based on an old popular Japanese show from the 70's to 80's. I might have to ask my family more about this or get them to stop by my favorite Hobby Store when they are in that part of the city. http://www.super-rc.co.jp/osaka.html

Oct 21, 2009, 11:57 AM	#19
pakrat961 Registered User Join Date: Mar 2004 Location: Southern Cal. Posts: 16	I've actually modeled both the Pelican and Hornet in the flight sim X-Plane, and while I love the original idea of an R/C VTOL Pelican, the Hornet is much more practical. Here's a couple videos of the full-size X-Plane models: Full size Hornet in X-Plane Full size Pelican in X-Plane I also have thought about making an R/C version of the Hornet, and in support of that endeavor I scaled down my full-size X-Plane model to an R/C size, just to see how it might handle. Here's a video showing it flying around, testing control response: R/C size Hornet in X-Plane (~3ft wingspan) (the nacelles aren't animated like the full-size one, but the engines ARE actually vectoring) I modeled it as realistically as possible; there are NO flight-surfaces, it is controlled entirely with thrust-vectoring (for pitch, yaw and lateral translation) and slight differential-throttling (for roll). Thrust in this X-Plane version is modeled as counter-rotating electric props. This simplifies any adverse-yaw effects that same-direction-props or twin EDFs would introduce. Obviously this is modeled with some gyro-stabilizers for all three axes of flight. In the lower-left corner of the screen you can see the control input graphed alongside the stability-correction-response. You can actually get a small IMU designed for robot projects to give you the exact kind of pitch/roll leveling-control seen in this video. Later in the video you'll see a bunch of lines coming out of the engine-nacelles; this is the thrust downwash, and when visible it shows how I modeled the thrust-vectoring control. I hope this helps to better understand the Hornet, I've done a lot of research and modeling to get the X-Plane version to behave. If any of you have X-Plane and would like to check out my R/C Hornet, just let me know. It's not posted anywhere, but I'd share it with fellow modelers. :-) ~ Ben (aka Mid7night, elsewhere on the web...)

Oct 23, 2009, 03:35 AM	#20
Elite Whats going on Guys??? Join Date: Jul 2005 Location: New Zealand Posts: 71	Hey, just a thought... Could you use the pelican’s large fuselage as an advantage by building it out of something very light, 1-2mm depron perhaps? And then stuff it with milar bags filled with helium to carry most of the weight. Though I guess to be able to fit enough helium in there it'd have to be a pretty massive model...

Oct 23, 2009, 08:23 AM	#21
swami Registered User Join Date: Jul 2001 Location: Ursel, Belgium, Europe Posts: 110	Hmm, you need 1m³ of helium to lift about 1kg. Dirk.

Oct 23, 2009, 10:48 AM	#22
pakrat961 Registered User Join Date: Mar 2004 Location: Southern Cal. Posts: 16	If you fill your body with Helium, where does the hardware go? I don't think you'll get a gain from Helium bags - besides, then you've gotta buy the stuff! One more recurring cost... I really think the Hornet is doable, and would be a great first-step if you wanted to do the Pelican later.