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RE: Top Flite Giant P-51 Conversion - 2/9/2008 8:14 PM   
bladerunner1955


 

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Status: offline 		Ron, I charged my packs up but on the maiden I only flew it for about 4.5 mins. They took 2.24 amps to charge them. My next flight will be 5to 6 mins, then I'll see what they take to charge. Tomorrow is Sunday and I am going to fly the P-51 again. I'll let ya know. I have changed from a 20/12 to a 22/10. the 22/10 is pulling more in the 77 to 80 amp range but I don't think I will need to fly at full power by how the testing went. I could hardly hold on to it.

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RE: Top Flite Giant P-51 Conversion - 2/11/2008 12:32 AM   
bladerunner1955


 

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Status: offline 		Hey Ron, your going to dig this. I just got back from flying the TF electric P-51 at a gas field some of my friends fly at out in Palms Springs. My friend has the same plane but was a RTC version that he did up in the gun fighter paint job(very nice job of it too, the pictures don't do his plane justice). He runs a Desert Aircraft 100 in it with a 22/8 prop. I was running a 21/12 prop and the electric P-51 was a little faster! Not by much but was faster by a hair. I sorta thought they were about the same but my friend even thought the electric P-51 was faster. I flew twice for 5 mins and recharged using 3.5 amps each time. I was flying hard too. Going to try 6 mins with not so much full throtal next time.

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< Message edited by bladerunner1955 -- 2/11/2008 12:34 AM >

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RE: Top Flite Giant P-51 Conversion - 2/11/2008 3:14 AM   
Ron101



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Status: offline 		very nice info Bladrunner..
I'm pretty sure thats a DA 50 in his? not a 100
but I know they are very fast with a DA 50 so you are really cooking!!

I may have to put together a new one.. I just lost my last nitro plane today.... it was a 60 hanger 9 mustang with around 400 flights on it
belive it or not but I'm happy to be rid of the slimmy little pig it was..lol

That a great field I was out there last year for the best of the west jet meet... must get real hot out the in the summer

great job one your plane.. very impressive.. have you thought about a hatch to get the batt. in and out?

Thank for the update
Ron

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RE: Top Flite Giant P-51 Conversion - 2/11/2008 3:27 AM   
bladerunner1955


 

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Status: offline 		Ya I think your right on the DA 50 not 100. I don't do gas engines unless its a Harley. Is that or is that not the coolest flying spot? I go there about 4 or 5 times a year. Anytime after May is like an oven. Today the wind was calm, even the big windmill generators were standing still. I was taking a little guff about my planes needing to have the rubberband wound up to fly. then they saw the electrics in action,changed a couple of the guys minds.
Hey Ron, ya want a cool conversion? Get hold of either one of the Hanger 9 Spitfire of Corsair, I know your over the Mustang, and stick an AXI 5320/28(low count) in it with 10 cells of lipolys. Hang a 18/12 prop up front and you will have a good time.
About the hatch for the batterys,,I always just take off the wing. I don't like to cut into an airframe. Then when ya have the wing off you can check stuff out.

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RE: Top Flite Giant P-51 Conversion - 2/13/2008 2:57 PM   
bladerunner1955


 

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Status: offline 		Here is a clip of the electric and the DA 50 flying the other day. They looked to be the same speed even though some of the gas guys even said my electric was a little faster???? This was a great trial for us electric guy to be able to compair our electrics to a larger gas engine. Here is the clip http://www.youtube.com/watch?v=mn1s5UPZZY4


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RE: Top Flite Giant P-51 Conversion - 2/13/2008 4:28 PM   
Ron101



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Status: offline 		Looks great blade...
that DA 50 sounds horrible..lol.. it's running rich
if he proped down and went with a high picth that plane can do about 120 mph...

electric sounds much nicer... the nice thing about the neu motor I run in my extra is ...being thats it's geared it sounds like a turbo prop.. I love it

That feild is great! but it's like 7 hours drive for me... I watched a beautiful f-117 turbine crash there a few years back... that was sad

Nice stuff Blade

Ron

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RE: Top Flite Giant P-51 Conversion - 2/14/2008 12:09 AM   
rc34074


 

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Status: offline 		Bladerunner- your mustang flies very well. Makes me more confident about doing my own. thanks for sharing your results.

Ed

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RE: Top Flite Giant P-51 Conversion - 2/16/2008 11:34 PM   
bladerunner1955


 

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Status: offline 		Hey Ron,
A little more lipoly recharge information for ya, this morning I flew the Doll for just over 5 mins, recharge was 3.2 amps. Not bad for such a heavy bird. I bet with a little control on the throtal I could get 7 mins out of her. But I guess we will never know as I don't know how to manage less throtal on warbirds,yet. I'll give it a go Sunday morning. Looks like another summer day here in Huntington Beach. When I left the field it was about 75 degrees, sorry guys back east, we pay for this weather in taxes and lots of people, and I mean lots of people.

< Message edited by bladerunner1955 -- 2/16/2008 11:35 PM >

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RE: Top Flite Giant P-51 Conversion - 2/17/2008 1:05 AM   
Ron101



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Status: offline 		Right On Don...
I get about 5:00 to 5:30 on my extra...
but thats alot of full power verticals

you know what 5 minutes is good for me...lol.. go take a break
I can't wait to do a gaint warbird conversion

well off to my brithday

Ron


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RE: Top Flite Giant P-51 Conversion - 2/17/2008 1:47 AM   
bladerunner1955


 

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Status: offline 		Is today your birthday Ron? What better time than your birthday to get the giant scale warbird you want. DO IT!
Happy Birthday

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RE: Top Flite Giant P-51 Conversion - 2/17/2008 5:11 AM   
Ron101



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Status: offline 		lol... it was my birthday on the 13th we just had the party tonight..
I just bought a new hanger 9 60 mustang during the week... I have this and a tam jet a-4 to finish..
the wife we kill me if I drag home anymore planes...lol
but I'm hoping in a few months

Ron

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RE: Top Flite Giant P-51 Conversion - 2/22/2008 4:14 AM   
bladerunner1955


 

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Status: offline 		I know, I know, Its like showing your kids picture at a party, my friend keeps sending over clips of our planes and he sent this one from last weekend. At least the landing was cool. The take off and landings on these clips are the best part. The in between seems a little far away. http://www.youtube.com/watch?v=KWs8ZfS7xbg

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RE: Top Flite Giant P-51 Conversion - 3/26/2008 6:35 PM   
The Swede


 

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Status: offline 		Hi.
Have read through this thread with great interest. I am in the process of building a TF 1:5 Mustang which I want to convert to electric. Want to swing a Soloprops 24" or 26" inch 4-blader and carry a Benedini soundsystem.

However, I am totally new to electric flying (have done my years of glow and gas) so I feel completely lost in the electric world.
Have done some research and think I want to use an Axi 5345/16 motor with a Hi Model professional 100 A, 2-12S OPTO brushless ESC. Does this seem like a set-up likely to work? If so, how do I power it to get a flight time of approximately 12-15 minutes? Want to use LiPo's of course...
What do you guys suggest?
Also, please come up with suggestions on a Good motor/ESC combination if you think my set-up wouldn't work.

Grateful for all advice I can get

Benny, a Swede in exile...

< Message edited by The Swede -- 3/26/2008 6:36 PM >

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RE: Top Flite Giant P-51 Conversion - 3/26/2008 9:42 PM   
Darrell B.



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Status: offline 		Benny,
I think that the 5345/16 is too hot for a 24" 4 bladed prop. I would look at the 5345/18 or the 20. These are able to turn a larger prop, and with the solo prop you can crank in a lot more pitch to make up for the loss of Kv on the cooler winds. If you go with a different controller that can go up to 14s Lipo this would make up for the lower Kv of the cooler winding. I just believe that the prop that you want to turn will pull to many Amps for the 100 amp controller that you are going to use if you go with the 16 wind.
Darrell B.

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RE: Top Flite Giant P-51 Conversion - 3/27/2008 10:22 AM   
The Swede


 

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Status: offline 		Hi Darrell.

Thanks for your good advice. You don't happen to know of an ESC as you recommend, by heart? Also, what do you think would be a suitable LiPo-pack set-up to give me a reasonable flight time? When it comes to electric flight I feel as confused as a brick... well... couldn't come up with anything whitty there...

Anyway, utterly grateful for any advice you could give me.

Benny

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RE: Top Flite Giant P-51 Conversion - 3/27/2008 12:17 PM   
The Swede


 

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Status: offline 		Did some web browsing and found the Jeti Spin 200... good piece of kit but... nearly $550,00 for an ESC... phew! Dropped a question to electric specialist BRC Hobbies here in the UK. They recommended an E-Flite Power 160 motor (equivalent to an 1.60 glow... sounds a bit weak) and a Hi Model Professional 100A, up to 12S ESC, all run on a Flightpower 4350 5S 2 in series=37 V LiPo pack.
What do you think about a Hacker A60-24S? Haven't found any specs on this motor anywhere.

Sorry, a lot of questions here, but just desperate to get things right before a disasterous test flight and too much ££££ spent ($$$$ in your part of the world).

Benny

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RE: Top Flite Giant P-51 Conversion - 3/28/2008 2:14 PM   
Darrell B.



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Status: offline 		Benny,
I have to agree with you about the Spin controller. The only redeaming quality is that it should be bullet proof at 200Amp. unfortunately
the motor won't take that many amps. Like you, I think the E-flite 160 is week. I have flown both the E-flite 60 and the AXI 4230 and have to say
I like the AXI better. I haven't tried the 160 but Greg Covey has used one and liked it very well. Send him a personal message and see if
he might chime in here. To turn the 4 blade solo prop that you are talking about you are going to have to go with much more motor than
the plane will need just to fly. I am running mine with the AXI 5345/16 turning an APC 21x14 and the plane is a screamer. My flight pack is
only 4600mAh though, and I'm only geting around 8 minutes of flight. The coller wind of the 18 or 20 should pull less amps and so give you
longer flight times. I still think that 12s Lipo is the way to go. Look at the Castle Creations 110HV, or the new Kontronics ESC that is supposed
to take up to 63 volts. It really looks sweet for these high voltage applications.

Best Regards,
Darrell

< Message edited by Darrell B. -- 3/28/2008 2:15 PM >

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RE: Top Flite Giant P-51 Conversion - 3/29/2008 12:31 PM   
The Swede


 

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Status: offline 		Hi Darrel.

I am leaning towards the Axi 5345/18 or 20, however, can't find the 20 anywhere not even at Tower Hobbies. Do you have an idea of where to get it? To make decisions more complicated I found a (what I think anyway) relatively new Hacker; the A80-10. Claims to be equivalent with 50-80 cc petrol. It has got a rated Kv on 180, power 3811W = 5.1 Hp. Although running it on two 12S in series would give an RPM of nearly 8000... Very high for a big 4-blader... Bearing in mind my poor knowledge in electric flight it seems more sensible to down to an 8S which would give 29.6V and approximately 5300 RPM... or... feels like I am missing something here? Obviously the prop slows the system down considerably but..... aarghhhh I know too little about these things to get a good grip Oh those good old petrols... No, sorry... I am absolutely determined to get to a good solution for an electric conversion. Just the sound from a Benedini Merlin makes it worth all the head-scratching, sleepless nights, son and wife leaving me, the cats avoiding me and... lol, it's not that bad but...

Anyway, thank you ever so much for the time you take to help me out. Invaluable!!

Benny

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RE: Top Flite Giant P-51 Conversion - 4/1/2008 3:59 AM   
bladerunner1955


 

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Status: offline 		Hey Benny, go up to post 152(opps not in there, I'll put it in this reply). This shows my P-51 next to my friends P-51 that has a DA-50 in his. I run the 5345/16 with 12 cells. Two 6 cell packs in series, thats something like 50 volts. I turn a 21/12 APC prop and pull about 75 amps. I am getting away with using the Spin 77 amp controler. I have the 90 amp Spin in another large warbird but the price is about $80.00 more. I have flown the P-51 now about 8 times and run most of the time full out. It moves out right nice. I'll stick another clip of my P-51 in here for your to see.
http://www.youtube.com/watch?v=mn1s5UPZZY4 this one is with the DA-50
http://www.youtube.com/watch?v=KWs8ZfS7xbg

Keep asking questions before you start buying stuff. The hacker motors are great and same with the Steve Nue motors but they run gear boxes and run into some large cash. I love the BIG AXI motors as they are almost bullet proof. I did how ever put a plane in on its nose(repairable,but stupid!) Two weeks ago and hobby-lobby sent me a new motor at no charge. Ya can't beat that.


< Message edited by bladerunner1955 -- 4/1/2008 4:02 AM >

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RE: Top Flite Giant P-51 Conversion - 4/1/2008 9:07 PM   
Darrell B.



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Status: offline 		Benny,

Sorry that it took me so long to answer ;your last post. When you look at Kv and volts you have to figure that without a prop your motor depenting on its specs
will only be pulling a couple of Amps. When you add the prop the RPMs go down and the Amps go up. This is due to several factors. First is the fact that the drag
of the prop in the air will produce an increase in Amps. Second, as the amps build up the available voltage from your batery will start to go down. What you end up with is a place where you reach equilibrium. This will give you your final rpm verses amps. The higher voltage you can use in these low Kv motors the beter as long as you don't over prop them. Your effeciency will drop off really fast if you pull more amps than they are rated for. When it is all said and done, If a motor is rated at 180 Kv, and all of the other specs of the motor are equal then they should performe similarly. I have looked at the big Hackers but have no personal experience with them. I hope that all made perfect sense.

Darrell

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RE: Top Flite Giant P-51 Conversion - 4/1/2008 10:48 PM   
The Swede


 

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Status: offline 		Cheers guys, and yes it makes sense. A completely irrelevant question: Bladerunner, I loved to see your Mustang bird and the landing... spot on, but I just wonder... the music you put to the video... what band? I absolutely loved the drummer... sorry, old drummer-boy myself... hearing something good just gets me in to a spin... unlike my models... of course!

Anyway. Came across a web-shop yesterday that frequently advertise in our British model press, Hobby City. They sell stuff straight from factory to incredible prices... might be incredibly c..p stuff as well but... Have you ever heard of HXT motors? approx $150.00 for a 130 Kv 6500W 60-80cc equivalent, Zippy LiPo's $110.00 for a 5000 mAh 5S pack...
Sounds too cheap to be good, eh?

I'd like to thank you guys for the help you give me and the time you spend doing it. Without having bought any electric equipment I feel this is the way to go. I f you only have a bit of knowledge, the possibilities are virtually endless what models you can create.
I think I am getting a slight grip on this now and I feel I am getting close to placing an order... feels a bit similar to the birth of my first son... lol even my wife is getting excited about the project and "can't wait to see this one too... crash..." Have promised me some time off to finish the build of my beauty...

Just one more question: Does anyone know of a 130+A high voltage ESC for a price that doesn't force you to remorgage your house?

Yours sincerely

Benny, a Swede in exile

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RE: Top Flite Giant P-51 Conversion - 8/28/2008 8:06 PM   
rlnstone


 

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Status: offline 		Darrell,

I just ordered by TF -51 RFT kit. Did you make any improvements to you conversion setup? What are you running now?

Thanks,
- Dan


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RE: Top Flite Giant P-51 Conversion - 8/28/2008 9:31 PM   
Ron101



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Status: offline 		Hey Dan,
I have the top flight ARC on order from tower as of last week... I got an email that it went on back oder till the end of next month
but I'm going to clean up the shop.. do a few repairs to some planes... and start to order my cockpit kit and I'm doing a smoothed in cowl so I have to order it

I'm going to run a nue 1521 geared inrunner... I may even setup to the bam motor... I want 4000 watts for sure I'm guessing 25 to 26 pounds ready to fly
if it 26 I'm looking at 153 watts per pound which will do the trick really good...

I'm going to glass mine, I may use flight metal... going to start testing to see what I like.. I'm going to make up a few panels in the shop to glass and piant ... glass and flight metal... then just monkote
check the weights see what looks best.. I hear the behr sivler looks really good.. so I want to try a bunch of method out before I put it on the plane

I built one last year the ARF and sold it.. full cockpit.. added a bunch of details..it was 24.5 pounds with no fuel.. so we have to watch the weight or you'll have a lead sled

it's going to be a really fun project!!

good luck on yours

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RE: Top Flite Giant P-51 Conversion - 8/29/2008 1:02 AM   
Darrell B.



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Status: offline 		Dan,

I think that you will be very happy With this plane. I have changed my power setup in a couple of ways. First I'm running the AXI 5345-14 and all I can say is WOW!!!
I run the 21x14 APC e-prop and it pulls vertical all day long. I have never checked the speed with a radar gun, but top end is nice.
I"m still using the Castle Creations HV110 controller, and I"m running a 14s2p pack of the A123 cells. If I ever get my P-39 built, I will use the same setup, but I'm
going with a 12s2p 10000 mAh of the Zippy cells from China. The A123 cells are heavy and if you glass your plane I don't know if you could take the extra weight.
I would go with a 5000 mAh lipo pack.
Good luck and best wishes,
Darrell

< Message edited by Darrell B. -- 8/29/2008 1:03 AM >

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RE: Top Flite Giant P-51 Conversion - 8/29/2008 6:19 AM   
Ron101



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Status: offline 		right on Darrell.. sounds like you have it dialed in!!

I'm not up on AXI motors

what is the differance and speed wise between the 5345-14 5345-16 then the 5345-18

I see you get more power the higher you go but what about speed... I'm not totally sure what to power this thing with yet

I do love the neu motor so we shall see

Yep I'm going 12s 5000 ... if it can take the weight I'll go 6000 mah for a extra few minutes

I'd like to get 8 minutes ... if I can hit 25 pounds loaded I'll be golden... but with glass and paint it will be tough!!

Ron

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