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View Full Version : Looking for top speed on .60 Mustang Conversion


DerGoetz
07-10-2006, 05:08 PM
I will run it on a 6s to 7s (can do both, 6s would obvioulsy be lighter and preferred) setup.

It is a H9-style .60 P51 conversion.
For top speed, what would I do?
Right now, due to their weight and price, I am looking at the AXI 4120/18 and the 4130/16.
I know the 4130/16 on a 15*10 will run great, but I am looking for speed on this one.

I was looking into the Hacker 50's as well.

Any recommendations?

Thank you,

Götz

rcers
07-10-2006, 07:28 PM
If you want speed you need to focus a bit more on the propeller.

How about a 14x14 apc (I know they are glow but will work just fine). You need to keep the pitch speed up to do that. Either that or spin a smaller prop very fast.

The 4130 would be better, speed takes watts/amps and lots of them. Higher voltage is better too.

Mike

DerGoetz
07-10-2006, 09:37 PM
What do you think then of the Hacker A50-12L??
I could run this one to up to 8s (Weight wise..10s would be too heavy for my plane)???

KV 355 RPM
Max Power (15sec) 1650W
Continuous Amp 45A
Max Amp (15sec) 60A
Io 2.3A
Ri 0.021 Ohm
Shaft Diameter 6.0mm
Weight 470g (16.6oz)
Diameter 48mm (1.89'')
Length 66.8mm (2.63'')
Max RPM 13'000 RPM
Bearing 4 Ball Bearings
Poles 14 poles
Battery 6-10S Li-Po (22.2-37V)
ESC 40-70Amp
ESC Timing 20-25deg
Switching Freq. 8-16kHz
Built in fan Yes
Prop (6S Li-Po) 17x10
Prop (8S Li-Po) 14x7
Prop (10S Li-Po) 11x6

rcers
07-10-2006, 09:46 PM
Gotz - the prop is key in this - the "6" and "7" pitch just wont get you the speed. That motor with 6s on 14x14 prop might just give you the speed you are after. I think 6s would be better for weight if you can do it...

If you go 8s you will need to look at 12x12 or so, just keep the amp draws in the 50's and you should be fine.

The prop pitch is one of the things that make them go fast....

Take a look at these:
http://www.rcgroups.com/forums/showthread.php?t=149025
http://www.rcgroups.com/forums/showthread.php?t=217517
http://www.rcgroups.com/forums/showthread.php?t=256745
http://www.rcgroups.com/forums/showthread.php?t=365006

Mike

DerGoetz
07-10-2006, 10:43 PM
Mike, thank you SOOO much!
I would have had a hard time finding these threads, again, thank you.

DerGoetz
07-10-2006, 11:12 PM
But it seems the AXI setup even on a 12 pitch has a hard time getting 70mph, even :(

Any ideas???

rcers
07-11-2006, 04:03 AM
I think you might be surprized how fast 70 mph is. That means you are turning nearly constantly. But if you need more speed you need RPM's and pitch. simple as that.

Mike

laxlife
07-11-2006, 10:55 AM
The Hacker C50 10xl Acro 6.71 gearbox on 6s3p lipo fuel gives us unlimited vertical in our H9 Miss America. I can't say enough about this motor, its great!

DerGoetz
07-11-2006, 03:58 PM
Dear wdahlstrom, what top speeds are you getting and what prop do you run?
I was looking at those Hackers, and if the speed is there, I would get one.

laxlife
07-12-2006, 03:27 AM
I have no way to measure the speed. Its fast. If speed is related to lifting power (and it must be) this setup's ability to go straight up forever should translate to real meaningful horizontal speed. Hackers aren't cheap but they are well built and the noise that eminates from that integral 6.7:1 gearbox is very appropriate to a P-51 warbird; noisier than an outrunner motor but very cool. Prop is an APC 16x12.

DerGoetz
07-12-2006, 03:50 AM
Thank you so much for your info.
I will be testing a brand-new motor next week, a Tornado 60 size at 1050kv! Outrunner! Will spin a 14*7 at 6s at 60-70 amps.
But if that fails I WILL go with your advice, Dahlstrom, and get that Hacker.

But please educate me some more. Based on what did you go with the 6.7:1 instead of the 3.7:1??

Thank you, again.

Goetz

laxlife
07-12-2006, 04:27 AM
That selection was made for me. As far as I know Hacker's C50 Acro series doesn't come with any other gearbox than the 6.7:1

DerGoetz
07-12-2006, 05:04 AM
Made by Hacker? Since I am considering calling them to get a recommendation myself.

Here is what I am looking at:
http://www.hackerbrushless.com/motors_c50.shtml

laxlife
07-12-2006, 12:18 PM
Yup, the C50-10XL Acro that's our powerplant. I've come to love the folks at Espritmodels.com

jrb
07-12-2006, 04:22 PM
Here’s where you can see some video of my Mustang doing 70+ in show/shallow dive; breaks 80 in a dive from a higher altitude: http://www.rcgroups.com/gallery/showgallery.php?cat=500&ppuser=497 .

Not bad at all for only 33amps on 5S!

More about my conversion and prop specifically can be found here: http://www.rcgroups.com/links/index.php?id=4788 .

A Doppler analysis of the video said 73; got the same with a radar gun this past Monday as well as the 80+.


A guy was a big gasoline powered 80+ Mustang and was doing 90+ in his show dives.


Had hotliners doing 150+, along with some zippy F-? (S400 size) & EDFs doing 100+.

jonnyjetprop
07-12-2006, 08:54 PM
A clubmate of mine showed up at the field with a Hangar 9 Corsair. He went against the grain and went with an AXI 4130/20 and a 10s Tanic pack. He was turning a 14x10 prop close to 10k. Thats a pitch speed of 94 mph. It was screaming.

John

Saint Maurice
07-29-2006, 06:07 PM
:) Radio Control Conversion to Electric Flight
Hangar 9 .60 Size P-51 Glow to Electric Conversion
The setup below provides 898 watts to the propeller.
Here's EVERYTHING you'll need to complete your glow to electric conversion of the .60 size Hangar 9 P-51 (HAN2775):

Brushless Motor: PM413016AXI 4130/16 Brushless Outrunner Motor
Brushless Controller: JESAP77PW Jeti Advance PLUS 77 Amp Opto Brushless Controller WITH Program Card
BEC: KFS003 Ultimate BEC with 6V Output
LiPoly Battery Pack: TP420032 Two -Thunder Power 3S2P 4200 mAh 11.1V Li-Poly Battery Packs
Series Module: FMAC03S Series Module w/Deans Ultra Connectors
Connectors: DEA1300 Deans Ultra Connectors, pair
Prop: PE17010E APC 17x10 Electric Flight Prop
LiPoly Battery Charger:
http://www.hobby-lobby.com/g2e-h9p51.htm (http://www.hobby-lobby.com/g2e-h9p51.htm)

DerGoetz
07-29-2006, 07:45 PM
Thank you Maurice!

The plane isnt build yet, but I now have all the parts.
I went with the Neu 1912/2y
Spinning a 13*13.5
On 2*3s2p 8000 packs 10c
And a Castle 85HV

I will post as soon as the bird is up. But it will take a month. I am too busy right now :(

laxlife
07-29-2006, 08:00 PM
I'd tell your friend to be very careful using 10s on that Axi 4130. Its only rated to be used with 8s. I have this motor in my senior telemaster and was using 10s until someone pointed out the motor spec. I downsized in time and the performance didn't seem to suffer dropping down to 8s. The issue is the motor throwing a magnet if the RPM is too high.

Saint Maurice
07-30-2006, 04:24 AM
I’m working on the same project (Hanger 9 P-51 Miss America .60)

What type of prop adapter are you using?
Your prop feedback has been very helpful.
I chose the Himax Brushless Motor as part of my power plant.
(HC5030-390 Learn more (http://www.maxxprod.com/pdf/HC5030-390.pdf)• Gas equivalent - .46 - .90)
HC50 - These motors are for large models weighing 6-8Lb for 3-D flight, 8-15Lb for aerobatic flight and 10-20Lb for leisure flight

MaxAmps(2) Lipoly Lithium Polymer 4000mah 3S 11.1V Battery Packs Rated at 15C constant discharge
(These Packs have been tested at 20C Max Burst!!!)
Rated at 60 Amp Constant Discharge(15C)
Rated at 80 Amp Burst for 10 seconds(20C)
44mm X 132mm X 24mm
270 grams
These Lipoly Packs come with:
Noodle wire and a DEANS Ultra Plug
This pack also comes with the Hyperion Balancer Taps so you can balance your pack
:eek: $60.00 each @ MaxBatteries (http://stores.ebay.com/MaxBatteries)
Feedback: (5612) 99.7%