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General control line discussion => Open Forum => Topic started by: Dave Nyce on January 02, 2023, 12:03:06 PM
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Does anyone know of plans for a half-A control line model that uses an electric ducted fan?
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Does anyone know of plans for a half-A control line model that uses an electric ducted fan?
Dave, both Hip Pocket Aeronautics and Outerzone have a 20" wingspan Harrier jet that uses an electric ducted fan. It can be either set up for RTP (round the pole, i.e. flown with a stick and single line to plane with no other control in a circle, or by standard control line.
http://www.outerzone.co.uk/plan_details.asp?ID=2954 (http://www.outerzone.co.uk/plan_details.asp?ID=2954)
(https://outerzone.co.uk/images/_thumbs/plans/2954.jpg)
It has an option to install a vane in the exit thrust airstream of the ducted unit, to provide vectored thrust. If coupled with the elevator, could provide action similar to ailerons.
Good luck.
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Several on Outerzone for 1/2A that could be converted to electric:
https://outerzone.co.uk/advanced/search/results.asp?T1=CL&Y2=2022&K1=ducted&F1=Dscrp&K2=fan&F2=Dscrp
Mark
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Does anyone know of plans for a half-A control line model that uses an electric ducted fan?
As a stunter? Or just to fly around flat and level?
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As a stunter. Thanks for some ideas.
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I suspect you'd be disappointed in electric fans for stunting -- but it should be great for going in a circle fast.
I've been thinking of getting a larger RC ARF and converting it to 'lectric, just to get the complete package that Just Works so that I could go from there. Then, when I knew what was what, rip the fans out and build something from scratch. You could do the same thing with a smaller model -- figure out the ins and outs with something you don't mind demolishing, then build a nice one from the pieces.
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Not long ago, someone was stunting with a pulse jet powered stunter. I was amazed at how well the power level was matched to the size and characteristics of the stunt plane.
Thinking outside the box, :! don't see why an electric ducted fan model couldn't perform the envelope, if properly matching its thrust to airframe. Perhaps something like the Jetco Saber stunter scaled down to half-A size and with ducted fan integrated to the fuselage just behind the wing? D>K
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Not long ago, someone was stunting with a pulse jet powered stunter. I was amazed at how well the power level was matched to the size and characteristics of the stunt plane.
Thinking outside the box, :! don't see why an electric ducted fan model couldn't perform the envelope, if properly matching its thrust to airframe. Perhaps something like the Jetco Saber stunter scaled down to half-A size and with ducted fan integrated to the fuselage just behind the wing? D>K
Personally I like bigger planes, so I'd do something like a Skyray 35 with A-10-style nacells behind the wing and an extended nose to hold the batteries.
Your idea may do a better job of aligning the thrust with the CG - in fact, you may want to check out the Fan Trainer full scale. https://en.wikipedia.org/wiki/RFB_Fantrainer.
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Personally I like bigger planes, so I'd do something like a Skyray 35 with A-10-style nacelles behind the wing and an extended nose to hold the batteries. Your idea may do a better job of aligning the thrust with the CG - in fact, you may want to check out the Fan Trainer full scale. https://en.wikipedia.org/wiki/RFB_Fantrainer.
As in all things, there are usually no ideal solutions, only compromises. Trying to fit battery and power unit in a manner to make it all work out in half-A size would be a definite challenge.
With the stunting Dynajet, thrust was out the back end and above. I think the OP wasn't interested in a contest quality stunt machine in half-A size, but something of builder's initiative that would be easy to build but a blast to fly.
Anyway, those are my initial thoughts. I haven't even given electric powered flight a thought yet, but that may change as we see our glow power resources dry up. D>K
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Were the cutting edge of mighty scientic progress , at one stage . %^@
(https://outerzone.co.uk/images/_thumbs/models_more/11807/006.jpg)
Most of these would adapt . Saw a F2D on Ebay semi complete , once . One wonderes about the pointy bit , free flight .
(https://thumbs.worthpoint.com/zoom/images2/1/0321/20/vintage-nos-veron-ducted-fan-impeller_1_a68908fe7ee9081a0d90194db37868b9.jpg)
Such Tecnology ! Dunno if this'd intrest you .
(https://aerofred.com/c_images/img.php?src=./data/thumbnails/71/Grumman%20F9F%20Cougar.jpg&q=90&w=750)
(https://cdn.shopify.com/s/files/1/0904/7232/products/GRUMMAN_COUGAR_Page_6.jpg?v=1554555167)
A pitcher is worf a fousand words .
https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=17529.25
(https://cdn.shopify.com/s/files/1/0904/7232/products/Page_6_606fa8cb-77f1-4557-952f-5d97e5cbbeab_450x450.jpg?v=1549543025)
Youd get the bellcrank in the middle , on This One .
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Veron Deltaceptor plan is available here: https://outerzone.co.uk/plan_details.asp?ID=11807 (https://outerzone.co.uk/plan_details.asp?ID=11807)
(https://outerzone.co.uk/images/_thumbs/plans/11807.jpg)
(https://outerzone.co.uk/images/_thumbs/models_more/11807/007.jpg)
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As in all things, there are usually no ideal solutions, only compromises. Trying to fit battery and power unit in a manner to make it all work out in half-A size would be a definite challenge.
Yup. That's a good part of why -- being lazy -- I'd start with an ARF! That's all thought out and built. As long as you can find a home for the bellcrank you're in like Flynn.
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Thanks for all the comments. I think the Deltaceptor idea looks like a possibility.