Hangar 9 P51 150 questions?

[Heli1-2]

Hi

I am about to purchase this bird but need some suggestions

What Axi motor would closest match the recomended stock (eflite motor):

"Power 160 Brushless Outrunner Motor, 245Kv by E-flite"

My LHS have only Scorpion Jeti and Hobbywing + mgm compro controllers, should i rather import my power package stock setup reccomendation?

Would a 5s battery be fine, reading the success of the rcu review on the stock setup, i'd like to stay with it if i could:

http://www.rcuniverse.com/magazine/article_display.cfm?article_id=863

"Phoenix HV-110 High Voltage ESC

Power 160 Brushless Outrunner Motor, 245Kv

5000mAh 5-Cell/5S 18.5V 25C eXtreme V2 LiPo, 13AWG"

Should i get Robarts, i've heard a story or two about the stock gear folding in or ot properly closing, killing some of the scale authenticity in the air.

[Ron101]

Just reading above.. I'm sure you mean two 5s 5000 mah packs
for 10s is what you need.. one 5s won't fly this plane

Ron

[chalmrast]

Yes, you will need a 10S-5000mAh setup for this plane and a High Voltage speed controller. Looks like the AXI equivalent to a Power 160 is a 5330/18.

I'd go with the stock retracts in the beginning. A pneumatic system just ads a layer of complication. Just get two strong retract servos, one per side.

[LBJ]

As far as the retracts go, better plan on using some pneumatics. I have a friend with the same model you have and he has had nothing but Heck with the mechancals. Seems like every flight something goes wrong. His first two flights were landings on one gear! Pretty spectacular for sure but not desireable. He also has a H9 P-47 150 that he bought already done with pneumatic retracts. No comparison. Just about flawless.

I have the H9 P-51 150 NIB and when I get to it I am going directly to pneumatics.

I gave up on mechanicals on the H9 .60 Hellcat, went to Robart pneumatics, and now am going to Seirra pneumatics after the Robarts crapped out continually. Love the plane, hate the retracts. The sierras look to be pretty stout.

When retracts work properly they are a thing of beauty, but when they don't it's pure H-E-L-L.

On the powerplant, the Turnigy BIG 80 size motor is great for this plane. We are using it on 1/5 scale birds with the Turnigy 100 amp SC running as much as 12S 5000mah batts. I seem to recall the motor and SC is about $275 shipped from China. Not bad compared to AXI prices.

Friend's P-51 and P-47 above and my CMP 80 inch Zero are both running this same setup. Power is not a problem!

Go with Rhino Lipo's too. Great batts. I am using them as well as Zippy's.

Hobby City is the source.

LBJ

[Heli1-2]

Thanks, funny hangar9 does mention only 5s, or maybe they assume one should automatically think 2 5s which is fine maybe i should assume that obviously if you look at the size of the plane, though my big 3.2 meter voodoo glider flew with 3s, my heli with 6s, none of these craft can be compared to each other, whole different ball game of course :)

So i'll go 10s or 12's thanks, LBJ, my LHS is working out a quote for me for the whole package assembly of the model plus everything to make it fly excl. my radio off course.

So would be interesting to see what they have to offer. So you say now the robarts are also crappy :( sheez what Seirra Pneumatics would you suggest) I agree landing this model on two wheels would be a nightmare, i do not want to go that route!

And the power system you mention sounds very tempting, i my LHS gives me an unreasonable pricing on their suggestion i might go with the stock rcu (e-flite + CC)
setup or with what you suggest thanks.

[LBJ]

Minor correction on the Robarts for the Hellcat. Those are cheesy little POS that were not worth even marketing to start with. Robart has come up with another beefier design but they are not due out till late this year.

On the other hand, Robart pneumatics for lage scale birds are good stuff. I would go with them as well as Sierra's.

You can look at the turnigy motor install for my Zero on the thread "Need a Large Japenese Pilot for Fifth scale Zero" here as well as the H9 P-51 on the other active H9 P-51 thread here too. Ed Couch discusses his motor setup and the retract problem captured on film. You can see the same motor on my 1/5 scale Jenny on the "20% Jenny Coming" thread, right here.

If you go with the Turnigy, you may want to closely examine the bearings before flight. Run it up and if they make any noise, then you better find which one needs replacing. I have had zero problems with the Large Jenny 80 series motor, but had to replace the bearings on the Zero motor. One was bad so I replaced them all to be safe. If you can get a good price on the E-Flite motor then go with it as I have never had a problem with them. good stuff, but not cheap.
http://www.rcgroups.com/forums/showthread.php?t=898920
http://www.rcgroups.com/forums/showthread.php?t=933597
http://www.rcgroups.com/forums/showthread.php?t=981454

[Sean Sweeney]

I have been flying a 150 H9 mustang for about a year. On 10s and the Power 160 it has plenty of power. From a very short ground roll I can go straight up and roll her out of sight. (not very scale, yes, but fun!) I have the stock retracts and they have worked fine for me. They do require a lot of work to get them set up. I believe that much of the problems come from not getting the retract servo arms, and linkage perfect. It took me three tries to get mine to work right, but since then they have worked with out trouble. I would also recomend an after market spinner rather than trying to get the one supplied to work. I used the Dave Brown P-51 spinner on mine, True turn also makes one. It is a sweet flying airplane I am sure you will enjoy it.

Sean

[Carlyle Harper]

I believe that much of the problems come from not getting the retract servo arms, and linkage perfect.

Sean

Nope, my problems with the stock retracts were the spot welds holding the hinge on broke. Leaving me with either no wheel or a wheel turned sideways usually after takeoff. This was impossible to fix unless you have and can use a tig welder. Of course you know what happens when you suddenly stop a mustang. It noses over and lands on its back. I did this two times and then found cracked welds on the oleos that hadn't broken yet. That's when I went with Spring Air 404 retracts. They air up and spring down. Even if you loose air pressure, they will still come down.

I suppose if you always make the most perfect and softest landings you wouldn't have these kind of problems, but I doubt that will be the case.

[Carlyle Harper]

I'm running my H9 Mustang 150 on 12s A123 cells. The equivalent to a 10s lipo. Using an Axi 5330/18 motor and a APC 19x12 prop with the CC 110HV esc. It makes the glow guys cringe to see it takeoff with so much power. I haven't tried it yet but one day I intend to try a 19x10 prop to see if I can get the same performance with less amps from the batteries. The 19x12 is still within limits when I performed the ground tests.

I wish I had gone with pneumatic retracts from the start, but I didn't know any better. It took me a year to finally get it to where I can fly it and really enjoy it without having to fix the landing gear everytime.

[Carlyle Harper]

I think Robart now makes a custom drop in retract replacement for this warbird. Probably not on their website, but call and ask.

[Heli1-2]

Hi Carlyle, really!!, i'll give them a call thanks, that'll be nice.
Different opinions but so far i get the idea that if i have a couple hard landings i might run into problems with the stock gear. Anyone else in favor of robarts for this plane?

So LBJ, just to confirm you would give the go ahead on Robarts for the 150 size machine right?

I don't plan on having any hard landings but it will happen whether i like or not, too many environmental factors involved when landing any given day. Especially this plane though i've heard it's easier than other mustangs to land.

[LBJ]

What I can tell you is what I'm doing. I have the H9 150 P-47 and I am going directly to Sierra retracts. They have worked out great on my H9 Hellcat. Well made and they work! Robarts are good retracts. But, first call Darrel at Sierra and talk to him. If he doesn't have anything to fit the H9 150 P-51, then Robarts would be a good choice.

[Heli1-2]

Hi LBJ

I have already ordered from Robart, thanks for the help. Is it worth it to go the 4 bladed route? i'm not worried about performance it has been proven to work well, i'm worried about time and cost, does the 51 like to nose over now and then. What type of runway would be best, paved or grass?