algutkin

My Feedback: (1)

Test,

You gave me a head ache. You rewind perfectly good motors?

Al

tahustvedt

I have to if I want to spin bigger props. The stock 4130/20 likes 17x8 and 17x10 props on 8S.

CorsairJock

My Feedback: (90)

Not that different than the motor calc figures that I came up with, using no variations in motor specs, especially if the 10% is deducted as suggested in my previous post.

ALSO, I thought we were talking about the 4130/16 all along, NOT the 4130/20. My mistake if I missed it.

tahustvedt

The difference is quite big. Look at the RPM. The high resistance value causes a severe reduction in efficiency.

My point is that using the specified numbers doesn't give realistic results and the same goes for the 16 turn motor I'm sure.

I didn't mean to step on any toes, sorry if I offended anyone.

algutkin

My Feedback: (1)

My two cents worth.

You guys are proving my theories that the calc. programs are just ballpark computations and that the published motors/controller specs. could be wishfull thinking.

It seems that the old fashioned method seems to be the most accurate.

Get into the ballpark.
Test the configuration on your own.
Make adjustments based on your own research.
Then, use Motocalc to reinforce what you already know.

Engineers could argue theory until the sun burns out, but nothing gets done. Ya know, an engineer could look at a typewriter table and think for hours about the weight of the typewriter before putting it on the table. Us layman just look at the wood, push hard on the table, if it doesn't break, we put tyepwriter on it.

Come to think of it, maybe that's why I crash some planes. LOL

Al

CorsairJock

My Feedback: (90)

I don't know about stepping on anybody's toes, but your post are way off the subject(s).
The thread is about Hanger 9 Corsair electric power conversions, your motor setup surely cannot be intended for a Hanger 9 Corsair.
48 amps with 8S Li-Po? That would be insane in a Hanger 9 Corsair.
Second, we WERE talking about the 4130/16, which is by far the most common motor used for Hanger 9 warbird electric conversions. Nothing wrong with the 4130/20, in fact if I had to do it all over again, I think I would choose that instead. But when youi suggest that figures are not correct, then inject your own but with a different motor, we are comparing apples to oranges.

No, Electric Motor Calculator is not a precise science, but it gets you pretty close. A 10% margin of error is close enough for me. In terms of motor efficiency, it could be off maybe a percent or 2, and it gives a pretty good idea of what a given motor is capable of in terms of:
efficiency with a given prop and battery setup
amount of static thrust
Watts in/ watts out
etc.

Much better than just guessing, IMO.

tahustvedt

I was merely posting an example of how the Model Motors specified resistance gives inaccurate results since you guys were discussing the efficiency of the 4130/16.

I agree with you that most people tend to overprop/power their models today, my motor isn't used in a H9 Corsair but a larger 13 lbs warbird where it does a very good job with a 17x10 prop.

My flying buddy flies a H9 corsair with an Axi 4130/16, 6S (3300 I think but not sure) and a three-bladed 15" Vario Prop. It's a very nice flier.

steff5l6

many thanks for all post about the corsair hangar 9.. i ve learn a lot of things... i ve never find best forum in internet world...
a french rookie

CorsairJock

My Feedback: (90)

The new Master Airscrew 3 blade 15 x 7 props are now available, directly from Master Airscrew, Tower Hobbies, or (better yet) your local hobby shop.

TxCombatGuy

I won the Corsair at the North Dallas RC Club's Any Scale Flyin this weekend (best $20 investment payoff I've ever had!)

A couple of years have passed since the last post, so I am interested to know what the motor recommendation would be today for this plane. I have several 4S5000 batteries, so something that would run off of them would be prefered.



I am also more of a WW2 fan than the postwar scheme on the plane, so has anybody been successful at removing the markings and painting on the covering materials? I am thinking of doing the 3 tone scheme to make it easier to see in the sky and to have a more distinctive plane at the field.

Thanks!
Ed

Greg Covey

Hi Ed,

Congratulations!

Much has changed in the world of electric flight since I started this thread over 5-1/2 years ago. You can now simply use the electric equivalent of the recommended glow engine like an E-flite Power 60 outrunner motor. Even the distributors are on-board with alternate electric power system setups. Simply go to the Hangar 9 Corsair page [link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=HAN2575]here[/link] at Horizon Hobby and click on the Electric Conversion Setup link on the upper right. You will likely need a 6s LiPo pack though.

My Corsair is still in great shape and you can see my modifications from last year in issue #8 of AMP'D called, [link=http://www.rcuniverse.com/magazine/article_display.cfm?article_id=1029]Scale it Up![/link]

Good luck!

CorsairJock

My Feedback: (90)

Mine's still going strong, over 4 years old now, with AXI 4130/20 swinging Master Airscrew 3 blade 14 x 7, with 6S, 5000mAH LiPo power. Keep it light, to fly right.

ScottMcM

My Feedback: (66)

Hey guys, can anyone tell me the diameter of the cowl on the H9 Corsair? I want to stick a Saito FA-90R3 in one, but I don't want to butcher the cowl. Any info would be greatly appreciated.

Greg Covey

Hi Scott,

I measured a 7" diameter for the H9 Corsair cowl.

Regards.

ScottMcM

My Feedback: (66)

Thanks!

TxCombatGuy

Has anyone tried installing the TopFlite 1/7th scale cockpit in the H9? I have all of the covering off, and sheeting the wings and tail, and while I seem to have lost control of my ambitions I might as well try doing a cockpit conversion since I'm backdating it to a F4U-1 with a birdcage. Links if you have them, please. I will be doing a Fleet Air Arm 1837 Squadron Corsair I in honor of one of the Cavanaugh Flight Museum's past volunteers SubLt Jim Page who flew them off carriers in the Indian Ocean (2 victories) at the age of 18.

Thanks!
Ed