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Old May 14, 2013, 08:01 AM
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TripleW's Avatar
Prescott, Arizona
Joined Feb 2010
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Interesting.
Does the edf have it's own esc?
can't wait to hear it.
Walter
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Old May 18, 2013, 12:58 PM
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Tucson
Joined Nov 2009
842 Posts
Beautiful plane!

Even a 12 inch bite prop may only get you 58 mph at full throttle. And I am always skeptical that these batteries will produce more than 20C discharge. And running batteries in series puts more pressure on individual cells -- a weak one will start to heat up.

Although it's possible to get these big planes in the air, I haven't seen any good (robust and powerful) electric system options.
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Old May 22, 2013, 03:37 AM
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Australia, WA, Baldivis
Joined Oct 2007
38 Posts
EDF For Sound

Hi Walter
Yes, The EDF has its own ESC but it is program mixed as a slave to the ESC for the main 50cc Rimfire motor. I have put a mesh plate from an old Xbox 2 cm in front of the EDF which amplifies the volume of the air and also drops the amps that the EDF draws. It is down to 9amps at full throttle. The hole set up, including battery has added only 190grams to the plane. The battery for the EDF also powers all the nav lights on the aircraft.

EDF 50mm 18amps max
1800mAh 3S to run Lights and EDF

Regards Keith

P.S Making a movie now for you. Stay tuned.


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Originally Posted by TripleW View Post
Interesting.
Does the edf have it's own esc?
can't wait to hear it.
Walter
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Old May 22, 2013, 07:04 PM
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kcmj's Avatar
Australia, WA, Baldivis
Joined Oct 2007
38 Posts
PC-21 sound system

Here is the video

PC21 Sound (7 min 34 sec)


Regards Keith

Quote:
Originally Posted by kcmj View Post
Hi Walter
Yes, The EDF has its own ESC but it is program mixed as a slave to the ESC for the main 50cc Rimfire motor. I have put a mesh plate from an old Xbox 2 cm in front of the EDF which amplifies the volume of the air and also drops the amps that the EDF draws. It is down to 9amps at full throttle. The hole set up, including battery has added only 190grams to the plane. The battery for the EDF also powers all the nav lights on the aircraft.

EDF 50mm 18amps max
1800mAh 3S to run Lights and EDF

Regards Keith

P.S Making a movie now for you. Stay tuned.
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Old May 24, 2013, 01:41 AM
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TripleW's Avatar
Prescott, Arizona
Joined Feb 2010
6,759 Posts
Well done.
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Old May 25, 2013, 08:24 AM
"the bouncer"
mackone's Avatar
Australia, VIC, Vermont
Joined Nov 2006
4,568 Posts
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Originally Posted by ROV Pilot View Post
Thanks, good to know I'm on the right lines now with my setup once I change out the prop style.

I would love to see video of the PC21 and pics of the Swordfish if you have any.

Thanks for the info.
Hey ROV ,
I Maiden'd the Swordfish today , and Thanks to Mark we have a vid .
19.9 SG x (14) x 3 , 12s 5000mah , WOT 95amp 3750watts .

Swordfish (3 min 49 sec)
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Old Jun 05, 2013, 06:42 AM
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United Arab Emirates, Dubai
Joined Aug 2012
11 Posts
Really nice Mackone,

Looks like a very nice plane to fly and very scale....love the prop.

I guess its take a bit of time to put together once your at the field but well worth it.

I've been side tracked building a hexicopter for aerial photography but have just spend today getting the Seafury ready, batteries on charge now and a watt meter test when there ready then off for another test flight on Friday with the new props. fingers crossed
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Old Jun 05, 2013, 07:30 AM
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Australia, VIC, Vermont
Joined Nov 2006
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Unreal , ROV
Can't wait to hear how it goes , take some pic's or Video .

Cheers

Pete.
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Old Sep 24, 2013, 09:08 PM
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madbadger's Avatar
United Kingdom, England, Worksop
Joined May 2011
194 Posts
Has anyone fitted electric motor to a BH sea fury 20cc (1600mm version) ?

I really fancy one but it has to be electric, the manual says its over 10 pound in weight or is that with a 20cc motor installed. I want to use a 6s setup in one using a 450kv Turnigy motor. Will a 1000watts of power be enough?

Kev
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Old Sep 24, 2013, 10:22 PM
ltc
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United States, MA, Mendon
Joined Mar 2010
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100W / lb seems a bit on the low side IMHO.
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Old Sep 24, 2013, 11:15 PM
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United Kingdom, England, Worksop
Joined May 2011
194 Posts
If the model is really 10 pounds in weight! I have just built the BH mosquito and that is 1600mm wing span I'm wondering if the fury is 10 pounds with a 20cc petrol motor fitted. I will have to try and find out the weight of the model without a motor. I know I should be looking at 150 watts per pound. Will have to sort out a motor setup.

Kev
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Old Sep 26, 2013, 10:12 PM
Electric baptism 1975
DavidN's Avatar
Vernon, BC, Canada
Joined Dec 2000
2,797 Posts
Quote:
Originally Posted by mackone View Post
Hey Rov , SeaFury looks cool . I have a had a few setups with Ramoser Props
The best was a Pc21 running 17x5 on 12s 133amps at 5500watts , I am now just about ready to maiden a Fairey Swordfish running a 20x3 . I have done alot of testing with these props and I run them as big as the airframe will handle , in terms of size for scale , and then I set the pitch to the maximum amps the esc+motor should handle on the ground , then I know it will be ok in the air .

from the the figures you were running , I would go up an inch in prop , and set your pitch for the 100amp mark .

cheer's

Pete.
Interesting way to choose a prop. I always set my pitch by the pitch speed I need for the particular plane. Then the diameter for the thrust I need. Then either choose a motor to fit these or compromise to fit the motor I have. Geared electrics had huge props/Kw 10 years ago, but I prefer more moderate diameters now.
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