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1/5 Top Flight P-51 Electric

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Old 12-02-2008, 06:54 PM
  #51  
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Default RE: 1/5 Top Flight P-51 Electric

Ty, thanks for the info. Here is a hanger 9 P51 elecric with speakers. Sounds not to bad....but the cost ....WOW......More expensive than the Ram setup. They have the reoe royce and the mercedes sound for the Messerschmitt lovers. ALso I believe I saw the radials were represented
http://videoserver.rcuniverse.com/rc...Aerosound2.wmv
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Old 12-10-2008, 12:26 AM
  #52  
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Default RE: 1/5 Top Flight P-51 Electric

I got a really nice motor mount from esprite model
with there 4" stand off and a 1/8 spacer it's a perfect fit for the spychalla cowl
you have to have the length just right.. unlike a slip on cowl where you can just slide it back or forward a bit

the AXI motor has a huge 12mm shaft for the prop so I took the spinner to a friend’s machine shop and they opened up the backplate for me... had him do the prop on the lath also
if the spinner was off center you could get a bad vibration

I do like the way the AXI has an adaptor that mounts on the motor with four screws this becomes the shaft.. then the spinner and prop go on that
no collets to fly off.. the shaft is hallow and thread for a 4mm screw to hold on the spinner

the next problem was trying to find a 4mm x 120mm screw .. I checked every site I knew of and no one had it
ended up have to special order it from maryland metrics.. but it's a nice solid setup now.. nothing is mickey moused

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Old 12-10-2008, 12:34 AM
  #53  
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Default RE: 1/5 Top Flight P-51 Electric

I also made up two test panels I'm going to glass and use to test my paint colors and gun settings on

feels good to be back in the shop and get moving on it again

my neck had me down for almost 4 weeks... also got to fly for the first time in awhile which was great

the holidays will slow me down.. but I hope to really get moving right after christmas

Ron
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Old 12-10-2008, 08:36 AM
  #54  
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Default RE: 1/5 Top Flight P-51 Electric

Ron, on the spinner screw - I have an AXI 5330 with the 12 mm shaft on my 1/5 FW-190. I thought the 4 mm screw was too small for the big spinner, so I drilled out and tapped the shaft for a 1/4-20 screw. Stronger and a lot eaier to find the length you need.
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Old 12-10-2008, 10:21 AM
  #55  
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Default RE: 1/5 Top Flight P-51 Electric

"so I drilled out and tapped the shaft for a 1/4-20 screw. Stronger and a lot eaier to find the length you need. "

I thought of that.. but was worried I weaken the shaft.. but I can just go in a 1/2 and be fine
I think your right .. tapping it out and going 1/4-20 sounds like a smart idea.. I'll see if I can cancel my $10 4mm screw...lol

Ron
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Old 12-10-2008, 12:45 PM
  #56  
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Default RE: 1/5 Top Flight P-51 Electric

Alright Guys lets talk about wheels..
first off you have to understand when you go electric you can get a bit nuts when it comes to weight..
but the lighter any plane is the better it will fly... gas, nitro , electric , that'a common knowlegde

so here's the deal.. on my last GS TF P-51 I went with the Robart 5" aluminum wheels.. I just love the look of them
on this one I was going to go with the gleenis wheels... For the heck of it I grab the plastic 5" wheels that come with the kit and threw them on my scale

The pair weights 8 oz
robarts are 8oz a wheel so 16oz = 1 pound
the glennis are 9.5 oz a wheel = 1pd. 3oz

I could save a 1/2 pound of weight if I went with some cheap plasctic wheels.. thats a really big savings

does anyone know what the old byron wheels weigh? and will they fit a standard axl? snyone have a set
or do you know of a good looking 5" plastic wheel... I really like the robarts but saving a 1/2 pound would be really nice

any thoughts?

I know it's crazy.. but the lighter the better it will fly

Ron
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Old 12-10-2008, 01:08 PM
  #57  
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Default RE: 1/5 Top Flight P-51 Electric

I was just checking out tower ..they have a sullivan skylite wheel ..with an aluminum hub that looks pretty good..

what do you think? http://www3.towerhobbies.com/cgi-bin...?&I=LXHML6&P=0

just thinking

I'm glassing this one and want to hit the same weight as my last ARF version which was 24 pounds with monokote

1.I plan on lightening the cockpit kit and pilot.. (the armor plat and batt. box are heavy.. going to make with balsa... drill out the pilot where i can)
2. running two small lipos for the RX .. much lighter than ni cad or ni metal
3. the wheels
4. easy on the glass job and piant.. useing ploy c and laytex paint
5. lighter servos and RX
6. removing any wood that's not needed

if I hit 24 pounds I'll be a really happy camper
I know the scale guys think I'm nuts..
I had a hanger 9 P-51 that I tricked out and it went up to 10.5 pounds with no fuel... it was a handful to land
I built the same plane electric at 8 pounds and it's a joy to fly
That's why I'm trying hard to stay light

Ron
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Old 12-10-2008, 05:12 PM
  #58  
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Default RE: 1/5 Top Flight P-51 Electric

Ron, the wheels are OK. They seem to be more ballon type than what I would expect to see on a warbird. I got my Hurricane covered and ready to paint( pictures to follow) and I have a few questions being a newbie. Do I need a seperate battery for the RX and radio gear? How much cooling does the motor need as the motor is in a closed cowl with no real air inlets. I will be using a chin scoop for getting air over the battery and speed controller and am also considering on using the belly radiator as the exhaust for these components. Do you think that will be enough? Any thoughts and suggestions would be greatly appreciated.
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Old 12-10-2008, 07:39 PM
  #59  
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Default RE: 1/5 Top Flight P-51 Electric

I think you'll be fine on the cooling..
I'm not even going to put an exit for the air in mine.. just the air that can get in under the spinner, the holes for the intakes
I'm also going to open the holes in the exhuast stacks so they go threw to engine compartment..
I'll put some holes in the fire wall to get air over the batteries... if they get hot I can always open an exit in the rear later

I'm not so sure about the wheels yet.. I'll keep looking and think about that one still

As for the RX.. some will tell you a separte BEC is fine .. but I feel safer with two small lipos and regulated switches

just run 2 x 2s 1320 thunder powers .. hook those to a couple of regulated switches and fly all day on one charge
with less weight than one big ni-mh pack

you could run two UBEC (ultimate bec) off the flight battery .. but if the flight pack dies on you the party is over

ROn
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Old 12-10-2008, 08:15 PM
  #60  
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Default RE: 1/5 Top Flight P-51 Electric

Ram-bro,
I am currently runnig seprate rx batteries on allmy planes. I am using some 2750 mah batteries and can fly alot before they get low.
I use to run 2 rx batteries but since there is no vibration i only run one now...

You should not have a cooling problem unless you try to run full throttle all the time....

ty
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Old 12-10-2008, 08:23 PM
  #61  
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Default RE: 1/5 Top Flight P-51 Electric

Thanks guys, that is some good info
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Old 12-11-2008, 01:56 PM
  #62  
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Default RE: 1/5 Top Flight P-51 Electric

If you use those Sullivan wheels, get ready for some grief from your buds at the field...all that bashing and expense to get a great looking, much more scale model and then put ugly shoes on it's feet?? What are you thinking?
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Old 12-11-2008, 08:59 PM
  #63  
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Default RE: 1/5 Top Flight P-51 Electric

"If you use those Sullivan wheels, get ready for some grief from your buds at the field...all that bashing and expense to get a great looking, much more scale model and then put ugly shoes on it's feet?? What are you thinking? "

I know .. but man a 1/2 pound
I'm thinking of trying the Kavan 5" threaded wheels from hobby lobby.. they are super light.. but I hear they don't hold up all that well

what do you tink of these? maybe less grief..lol... http://www.hobby-lobby.com/wheels.htm

trust me I love the robart wheels I used to walk out in the shop and stare at them... but they are just so heavy
I may end up with them.. but wanted to see what else may work

I which someone could weigh the old byron P-51 wheels.. they didn't look to bad..
it's been years since I had a pair in my hand but I recall them being pretty light.. then I's have to track down a good pair

Ron
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Old 12-11-2008, 11:09 PM
  #64  
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Default RE: 1/5 Top Flight P-51 Electric

Hi Ron, you know I run the AXI 5345/16 on 12 cells and with a carbon fiber 22/12 prop pulling your P-51 around you wont care about the 1/2 pound I swear! The Robart wheels look like they belong on your P-51. Go for the Robarts! And i would like to see a set of Darrels Sierra Giant Scale retracts on your P-51 too OK?
Don AKA Bladerunner
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Old 12-11-2008, 11:25 PM
  #65  
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Default RE: 1/5 Top Flight P-51 Electric

Hey Don..
I plan on running the serria retracts... your right on the wheels...
I think I'm just going to order them ... I just loved my last set

just always looking for ways to shed so pounds..
thanks for the pics .. your bird looks great

Ron
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Old 12-11-2008, 11:35 PM
  #66  
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Default RE: 1/5 Top Flight P-51 Electric

Ron your going to use that custom longer nose section right? I think that is just what these P-51's need. I would like to get a ARC one myself and glass it and use one of those nose kits. Looking forward to seeing some photos of your project. Oh, a little off the supject but I want to let you know the Byron Corsair project is now a maidened plane, wheel came of on the landing though,the only thing I had not redone,,Opps!
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Old 12-12-2008, 12:51 AM
  #67  
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Default RE: 1/5 Top Flight P-51 Electric

Ron,

Forget the Byron wheels. They are nothing but frustration. The foam is so poor that they eventually breakdown and will fracture into pieces flying off the hub. Plus they soak up water on wet grass. I used them for years but never liked them. One good side skid and you will peel them right off the hubs. It was all this trouble that lead me to design, develop, and tool the first 5.25" dia. Tuff Tread tire for Robart. (They actually measure about 5.125") You can see my initial prototype split pattern in the picture. I did a detailed study of real P-51 tires and AT-6 tires at the local airport. what I learned is that they should actually be about .200" wider than I decided to make them but a true scale width would not have fit the Byron hub at the time nor would it have retracted into many wing cord thicknesses of the day. The true diameter of a P-51 Mustang tire is 27 inches. So you can do the math. A 5" diameter tire ends up being a little too small. the 5.125 is better. The Robarts are nice and I use them, but I have a personal bias of course.

The tire you really want to seek out is the Dubro 5" Light Tread. I use them on my Spitfire and they are great. Much better looking than the Sullivan and lighter. Here are some weights:

5.125" Robart Tuff Tread with Aluminum hub 9.0 oz.
5.0" Sullivan with small aluminum hub 6.5 oz.
5.0" Dubro Light Tread with ABS plastic hub 5.5 oz.

I own the 5.0" Sullivans for a 1/4 scale Gee Bee I am working on. So I know their balloon look is ugly, but it won't matter under some wheel pants. Love those Sierra Giant Scale gear by-the-way!

Leo

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Old 12-12-2008, 01:58 AM
  #68  
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Default RE: 1/5 Top Flight P-51 Electric

Thaks Leo!
after seeing your picture of the sullivan's I don't like those at all...
I didn't know you designed the Robart wheels.. that explains why the look so good

I'll take a good look are the dubro's.. they look like a nice tire

thanks for the heads up on the byron wheels.. I had a set on a byron P-51
they never gave me a problem but at the time I was flying off astro truff ..
now I'm on a paved runway... so that's good to know

So I can save 7 oz. with the dubro's over the robart .. that's a good savings
but it comes back to how good the robarts look

I have time to figure it out
thanks for the info.. and pictures that really helps
Ron
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Old 12-16-2008, 08:15 PM
  #69  
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Default RE: 1/5 Top Flight P-51 Electric

Well I tell you I have bad luck with my health..
as soon as my neck got better .. I got a wicked cold.. so just started feeling better
I mounted the motor up today, tested to the cowl and spinner
everything lines up real nice.. I have to leave town for five days.. when I get back I'm going to hit it hard
Also got my aerotech outer and inner gear doors on order

here's a pic of the mount and the end result

the cowl is going to make this plane
Ron
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Old 12-16-2008, 08:59 PM
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Default RE: 1/5 Top Flight P-51 Electric

Ron, it looking very nice. You should consider running you motor without the cowl on firstmif you have not already. I went to a flyin this fall and a guy had a simular setup as far as the standoffs go. He was having so much torque that his spinner got into his cowl and really messed it up. The standoffs themselves were twisting..

Ty
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Old 12-16-2008, 09:27 PM
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Default RE: 1/5 Top Flight P-51 Electric

Thanks for the heads up Ty,
the mount does flex a bit more than I wanted... I may make my own standoff out of beefer material
I also have an 1/8 spacer I could use to give me more space to clear if it flexes to far

but I will be make sure it will clear.. I had the same problem on a H-9 P-51 I pushed the cowl back a tad and everything cleared

Ron
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Old 12-16-2008, 09:48 PM
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Default RE: 1/5 Top Flight P-51 Electric

you got me thinking about that
I just went out and tightened everything down really good .. put the plane one it's tail
and really tried to get the spinner into the cowl.. useing as much force as I think is safe I couldn't get it into the cowl
it still had a 1/6.. that was a lot of force .. I think I'll be alright
I may add those sapcer just to be sure.. I can always take them out later if all seems fine
that's probably the best bet

Ron
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Old 12-17-2008, 09:09 PM
  #73  
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Default RE: 1/5 Top Flight P-51 Electric

Hey Ron, Bladerunner here. Are the stand offs the HD style? They look like they might be the regular ones because of the flat spot on them. I use the HD standoffs and they do not move AT ALL. I have used the regular ones too with no problem. How long are they? Maybe with the nose longer the HD might need to replace the regular ones??? Just a thought. Looken REEEEEEAL Cooool Man! Hey Ron, I just looked at a reply to you where I said I was running the 5345/18,,,,stupid me I run the 5345/16 Oppps!
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Old 12-18-2008, 12:04 PM
  #74  
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Default RE: 1/5 Top Flight P-51 Electric

What up Blade..
these aren't the HD standoffs... but I think I'll order a set just to make sure this thing dosn't hit the cowl

oh you where running the 5345/16 ..cool...
I bet the new hacker 80 would have hauled that bad boy around real nice... maybe if you have a bunch of cash to blow you can try it out...lol


Ron
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Old 12-20-2008, 02:02 AM
  #75  
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Default RE: 1/5 Top Flight P-51 Electric

No more cash to throw around,,I just picked up 2, ya 2 1/4 scale Balsa USA Nieuport 28's,,need one? Very nice planes both of em. One is preset up for electric and the other is not.
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