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Avon Radio Control Flyers Discussion Area >> Working on a Project? >> Electric 26% Extra https://www.avonflyers.ns.ca/cgi-bin/Forum/yabb2/YaBB.pl?num=1340049272 Message started by greghatt on Jun 18th, 2012 at 3:54pm |
Title: Electric 26% Extra Post by greghatt on Jun 18th, 2012 at 3:54pm
Hey Guys,
As some of you know, I've been planning a 30cc electric conversion, well, all the pieces are in place finally, and I hope to have it ready to maiden this weekend. Here's a pic of the Hacker A50-14L that finally came in. I'll have install pics later on. |
Title: Re: Electric 26% Extra Post by Fingers on Jun 18th, 2012 at 3:58pm
How many of Bubbles batteries will THAT require!!! ;)
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Title: Re: Electric 26% Extra Post by Brian on Jun 18th, 2012 at 8:24pm
Hi Greg,
Very Cool! I'm actually thinking the same thing with a 50cc plane...just trying to justify the cost of the batteries! Brian |
Title: Re: Electric 26% Extra Post by Ramzz on Jun 18th, 2012 at 10:42pm greghatt wrote on Jun 18th, 2012 at 3:54pm:
mmm....hacker....mmmm :) |
Title: Re: Electric 26% Extra Post by greghatt on Jun 20th, 2012 at 1:25pm
Installation weeeeee!!!!!
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Title: Re: Electric 26% Extra Post by Davy Crockett on Jun 20th, 2012 at 1:30pm
Looking sweet!
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Title: Re: Electric 26% Extra Post by Fingers on Jun 20th, 2012 at 2:45pm
crud that's going to be noisy.... >:(
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Title: Re: Electric 26% Extra Post by waverider on Jun 20th, 2012 at 4:19pm
zzzzzzzaaaaaaaaaaaaaappppp
the sound of arcing as Greg connects aaaaaaaaaaahhhhhhhhhhh!!!! the sound Greg makes when Greg connects |
Title: Re: Electric 26% Extra Post by Davy Crockett on Jun 20th, 2012 at 4:25pm
lol :)
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Title: Re: Electric 26% Extra Post by Brian on Jun 21st, 2012 at 6:34am
Hi Greg,
small question... Isn't the 50 a bit big for a 30cc size? When i go look at the recommended motor for the electric conversion of my Hangar 9Extra 260, it is recommending the e-flite 160....I have a 50cc engine in the plane now, so i'm just wondering.... Brian are going to maiden on Friday? |
Title: Re: Electric 26% Extra Post by greghatt on Jun 21st, 2012 at 7:04am
Brian,
The A50 is the recommended motor for a 30cc 3d conversion. It will swing a 19" prop, which is on par with a dl30. Should be looking just shy of 2000 w. |
Title: Re: Electric 26% Extra Post by greghatt on Jun 21st, 2012 at 7:05am
Oh, and I have to work Friday, so no maiden for me. I'm crossing my fingers that Saturday morning will be ok
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Title: Re: Electric 26% Extra Post by greghatt on Jun 21st, 2012 at 8:42am
And here we are, Just waiting on the weather for a maiden flight
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Title: Re: Electric 26% Extra Post by Fingers on Jun 21st, 2012 at 10:49am waverider wrote on Jun 20th, 2012 at 4:19pm:
and how fast will that plastic covering melt????? :D |
Title: Re: Electric 26% Extra Post by Brian on Jun 21st, 2012 at 11:56am
Hi Greg,
It's all very interesting to me... If you do the umber though, say a dl50 is 5.5 Hp....that works out to 4125 watts. Th forums are recommending an A60-16l hacker, but this motor only pulls 3500 watts....and from all accounts it has gobs of power for a 50cc size plane. So, what t do?.... Brian |
Title: Re: Electric 26% Extra Post by Davy Crockett on Jun 21st, 2012 at 12:10pm
Fly the covering right offa her! That's what you gotta do
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Title: Re: Electric 26% Extra Post by Ben Lann on Jun 21st, 2012 at 1:03pm greghatt wrote on Jun 21st, 2012 at 8:42am:
Looks really good Greg! It will be nice to have another electric guy at the IMAC competitions this summer 8-) |
Title: Re: Electric 26% Extra Post by greghatt on Jun 21st, 2012 at 4:22pm Quote:
Brian, truthfully, I just researched what seemed to be working for ppl already. My biggest question with the set-up was weather to go 6S or 8S. I ended up with 8S for increased voltage, and lower amperage. But producing the same power. Now I have batteries that can be used for other things if I want. If it were me, I would find the more popular 50cc set-up, and if it seems to be working for people, go with it. I started over thinking the conversion at first, then just said frigg it, and ordered a combo. And it seems to be working out all right. |
Title: Re: Electric 26% Extra Post by Brian on Jun 21st, 2012 at 6:58pm
lol...yup, it's the old brute force and ignorance approach...lol
Works every time! I'm leaning towards the Hacker A60-16l as most people agree it is a great motor. Thinking of putting it in the 88" Yak i bought from Mark. by the way, are you using a seperate receiver pack? Brian |
Title: Re: Electric 26% Extra Post by greghatt on Jun 21st, 2012 at 7:09pm
I did yes. I use life packs and like the servo performance better at the higher voltage than a bec can provide. I simply ran it through a miracle on off switch. Works well.
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Title: Re: Electric 26% Extra Post by waverider on Jun 21st, 2012 at 9:03pm
Greg
its the powerplant you need to consider engine plus propeller You need to calculate the thrust, based on prop, rpm and required torque/bhp at 6000 rpm with a 19x8 APC you get 13.4 lb of static thrust. when flying T*V/550=bhp select a thrust and use a drag coefficient of about .3 D=1/2. rho. V^2. S. Cd = T at 45mph V=66fps V^2=4356 rho apprxs to 2/29^2 = .002378 at 59degF S/L ISA S= wing plan area ; say 5 ft^2 so the drag is 7.8 lbf =thrust for steady flight is .94 bhp I am not sure what the Cd of your plane is it could be as high as .4 because of the Reynolds number you are flying at The prop will not develop 13.8 lbf of thrust at that speed see also http://www.mh-aerotools.de/airfoils/propuls4.htm |
Title: Re: Electric 26% Extra Post by Davy Crockett on Jun 22nd, 2012 at 7:49am
This about sums up my take on that...
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Title: Re: Electric 26% Extra Post by Ben Lann on Jun 22nd, 2012 at 8:40am
I just maidened my 3D hobbyshop Edge 540 74" electric in Margaree last week.
This is my setup: 6S Hacker A5012L Castle ICE-100 Castle Creations BEC Pro Xoar PJM-E 20x10 Prop Turnigy nano-tech 6000mah 6S 25~50C Lipo Pack I haven't pushed the plane very hard yet as I am breaking the packs in. But it flys great and I am getting at least 7 min flights with power to spare. Plane weighs about 10.5 to 11 pounds and we calculated the thrust using the 7 in 1 HK meter to somewhere around 21 pounds swinging the 21x10 at 6600 RPM. In retrospect it might have made more sense to use a Life pack rather than the bec because I had to add about 100 grams to the nose to balance the aircraft. Also 8S would probably have been a good choice but I felt 6S was a simpler option for me and I saw youtube videos of the 6S setup and was impressed with the flying time and characteristics of the plane on that setup. |
Title: Re: Electric 26% Extra Post by greghatt on Jun 22nd, 2012 at 9:45am
ummmmm, waverider, it's a model airplane with a proven power system.......
Ben, I was thinking 6S at first myself, but Then I decided on 8S packs for the simple fact that I can use 2 smaller 4S packs, 3850 is what I decided on. I figured I can use the 4S packs in smaller planes if I want. I'm happy with my decision. God I hope the weather holds off this weekend. >:( PS, if anyone has a fish scale, could you bring it to the field so i can weigh my plane? |
Title: Re: Electric 26% Extra Post by Fingers on Jun 22nd, 2012 at 10:32am
all fine and dandy, but how many sparks do they explode with :o
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Title: Re: Electric 26% Extra Post by Ben Lann on Jun 22nd, 2012 at 2:52pm greghatt wrote on Jun 22nd, 2012 at 9:45am:
One benefit of me going with 6S is I am already looking going to a 50cc airframe for next year. Recommended setup is 12S ;D running the Hacker A60-18L Brushless Motor 3D HobbyShop 87" Extra SHP not sure if it will fit in the car though ;D |
Title: Re: Electric 26% Extra Post by Grant on Jun 22nd, 2012 at 7:44pm
Hi Guys
Keep up the good work. In pattern a year ago this was called the dark side.Now It seems to be the norm.I can see it all now, we will all be flying Electric in a few years. No more glow and Gas planes. Wonder what the turbine boys will do. Grant |
Title: Re: Electric 26% Extra Post by greghatt on Jun 22nd, 2012 at 7:58pm
They have that covered too grant...EDF haha
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Title: Re: Electric 26% Extra Post by Ramzz on Jun 22nd, 2012 at 8:49pm Grant wrote on Jun 22nd, 2012 at 7:44pm:
I don't think turbines will go the way of the do do bird like glow engines currently going. Part of the attraction of turbines, atleast for me, is the whole experience....the smell, the flames at startup, the sound and the realism. You don't get that with EDF. While EDF's are definately easy and convenient, their will always be a place for turbines imho. In 10 years, the only guys running glow engines will be doing so just for nostalgia purposes. I also predict that glow fuel will be the final nail in the coffin as the price will climb as fewer and fewer guys will be buying fuel. Most of the new guys at my field (less than 2 years experience) are going all electric from the get go and not even bothering with glow. I, myself, am going all electric from here on out. Just picked up a 800w charger, 800 watt power supply and a 2000w honda generator. |
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