RE: New Hangar 9 B-25

RE: New Hangar 9 B-25
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RE: New Hangar 9 B-25 - 7/18/2007 10:49:03 AM

LDM

Posts: 5088
Joined: 5/29/2003
From: Denver, PA,
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Dose anyone know the correct size of what small pilots would look like to fit this plane .
I would like to add the interior and the pilots to this plane so I figure they could be sourced at a good train shop and painted correctly .

Anybody do the math on the cost of the batteries for those of us going eletric ?

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LDM

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Post #: 51

RE: New Hangar 9 B-25 - 7/18/2007 7:41:39 PM

wildswan

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Joined: 2/4/2006
From: BirminghamWest Midlands, UNITED KINGDOM
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I reckon £200 (400usd) for 2 x Flightpower Evo 4cell 3700mah, thats whats going in mine.

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Post #: 52

RE: New Hangar 9 B-25 - 7/19/2007 12:05:02 AM

LDM

Posts: 5088
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From: Denver, PA,
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Thanks wild

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Post #: 53

RE: New Hangar 9 B-25 - 7/23/2007 8:55:10 PM

Hellcat716

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From: Las Vegas, NV, USA
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Anyone getting one of these for your first twin? I was told not to get a warbird for your first twin. Any comments welcome. I currently am flying most of the Hangar 9 warbirds and would like to get the B-25.

(in reply to captainron)

Post #: 54

RE: New Hangar 9 B-25 - 7/23/2007 9:15:56 PM

kahloq

Posts: 1792
Joined: 1/1/2006
From: Fort Collins, CO, USA
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The first twin I flew was an ME-262 ducted fan. Followed by an A-10 ducted fan and then a P-38. The P-38 was the easiest to fly because of prop wash.
The B-25 should be fine for a first twin, but there are things you need to be aware of. when flying a twin and setting up motors. Using fuel powered motors, you've got to be very careful to get the throttle servos working almost identical....meaning same length of servo rod, etc. It is not usually possible to get both motors running at exactly the same RPM at all throttle levels(even with electrics). So, you can have a variance of between 0-500 RPM's and you'll be fine.
If one engine goes out, you HAVE TO REACT fast enough to prevent a yaw type roll over towards the dead engine. You either have to have a lot of rudder to compensate or simply shut the other motor down and dead stick the plane down(probably best unless you use overpowered motors).
I am sure other ppl will tell you things to keep in mind as well.

If your unsure about it, get an e-flite P-38 and fly that. It can be setup for rudders. Use a simulator to practice engine out situations too. After this, get the B-25.
I dont think its a problem though. You've got seemingly plenty of stick time of several warbirds, so its not going to be a problem. There's not many twin civilian planes out there(in my opinion) that are worth the money to put together if your a warbird fan to begin with.

(in reply to Hellcat716)

Post #: 55

RE: New Hangar 9 B-25 - 7/23/2007 11:14:13 PM

wildswan

Posts: 95
Joined: 2/4/2006
From: BirminghamWest Midlands, UNITED KINGDOM
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I agree, it's a perfect first time twin as it has a light wing loading.

The rudders should be more than adequate to compensate for an engine out.

I'm putting the two recommended e-Flite 46 motors.

I'm not sure of the servo configuration as the website doesn't say what goes where, it looks like some mini metal geared servos are required though?

I've flown the H9 Miss America with a Saito 100, what a nice set-up that is.

The H9 Spitfire and F-22 Raptor with brushless electric 4120 axi equiv.

And last but not least the H9 P-47 150 with Z26, nice and scale (and big).

Crikey, I seem to favour H9 don't I?

Jason

(in reply to kahloq)

Post #: 56

RE: New Hangar 9 B-25 - 7/23/2007 11:31:02 PM

kahloq

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From: Fort Collins, CO, USA
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quote:

ORIGINAL: wildswan

I agree, it's a perfect first time twin as it has a light wing loading.

The rudders should be more than adequate to compensate for an engine out.

I'm putting the two recommended e-Flite 46 motors.

The specs for H9 B-25 on Horizon's website actually give a rather hefty wing loading of 36.5 to 42oz per square ft.
Their single engine planes like the Spitfire have much lower wingloading........
Spitfire @ 8.5 pounds has a wingloading of 26.07 oz/sq ft (the 8.5 pounds is a little light for the Spitfire as it has a flying weight of 8 to 9.5#s.....at 9 pounds the wingloading is still only 27 oz/sq ft).

The corsair has a lower wingloading then the Spitfire as per the flying weights listed on HH's site. At 8 pounds, it has a wingloading of 24.5 oz /sq ft. My Corsair weighs 8.4 pounds and floats pretty well, but still requires some power to land without stalling. At lower altitudes, it might float better of course.

What I am getting at here is that the B-25 is not a light wingloading plane....HOWEVER...theres always a but...lol.............the B-25 is bigger. The bigger the plane, the higher the wingloading can be and still fly really well. So, at an average wingloading of 39oz /sq ft on an 80" plane, it should be fine for someone's first twin. Just keep power on(or some speed) when landing even with flaps deployed.

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Post #: 57

RE: New Hangar 9 B-25 - 7/23/2007 11:39:45 PM

wildswan

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From: BirminghamWest Midlands, UNITED KINGDOM
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Should be a nice floater methinks.

.

I wonder if the barrel roll in the vid is possible with the electric setup?

Have you flown the H9 Spitfire? The flaps really work considering they don't deploy loads, hardly any power with flaps down looks cool when doing low level fly bys. Only thing I think is silly with H9 aircraft is the metal wingbolts, I've ripped the blocks out a fews times and now resorted to nylon ones.

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Post #: 58

RE: New Hangar 9 B-25 - 7/23/2007 11:43:28 PM

wildswan

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From: BirminghamWest Midlands, UNITED KINGDOM
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First thing with the B-25 is to replace any wing bolts.

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Post #: 59

RE: New Hangar 9 B-25 - 7/24/2007 1:09:50 AM

kahloq

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From: Fort Collins, CO, USA
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quote:

ORIGINAL: wildswan

Should be a nice floater methinks. .

I wonder if the barrel roll in the vid is possible with the electric setup?

Have you flown the H9 Spitfire? The flaps really work considering they don't deploy loads, hardly any power with flaps down looks cool when doing low level fly bys. Only thing I think is silly with H9 aircraft is the metal wingbolts, I've ripped the blocks out a fews times and now resorted to nylon ones.

I own the spitfire yes and have flown it a good number of times as well as the Corsair and H9 P-51. The flaps work yes, but dont rely on them all the time because ground swells can balloon the plane up with them down. The Spit is easier to land without flaps, but must be landed a little faster.

I do also have the FSK B-25. Obviously a much smaller plane, but mine has a rather heavy wingloading for its size(48" wingspan with a wingloading of 22oz / sq ft.)

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Post #: 60

RE: New Hangar 9 B-25 - 7/24/2007 1:51:51 AM

wildswan

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Nice looking planes. I live in Birmingham, UK. I fly off a grass strip, looks like you have a nice bit of tarmac.

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Post #: 61

RE: New Hangar 9 B-25 - 7/24/2007 1:54:21 AM

da Rock

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Joined: 10/11/2005
From: western, NC, USA
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quote:

ORIGINAL: wildswan

Hi,

For my B-25 I want to put 3 blade props on. What would be the equivalent of a 13x8 APC in a 3 blader?

I'm planning on using the recommended brushless e-Flite 46 motors.

Regards,

Jason

3 blades on an electric motor............. easy........... There is an application somewhere online the electric guys at my field use all the time. They would put in all the info to cover the use of that 2blade, check the results, and then match them with the 3 bladers they can find at the hobby shop. Reverse engineering at it's best. With electrics, "equivalent" is real easy to find.

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Post #: 62

RE: New Hangar 9 B-25 - 7/24/2007 4:59:13 AM

kahloq

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From: Fort Collins, CO, USA
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quote:

ORIGINAL: wildswan

Nice looking planes. I live in Birmingham, UK. I fly off a grass strip, looks like you have a nice bit of tarmac.

Its nice to take off from yes, but its a little short for landing(its only 250 feet long) and often times I do roll off the end into the grass/weeds/gravel. Better that then to stall the plane(which i ve done a few times....not a good thing).

(in reply to wildswan)

Post #: 63

RE: New Hangar 9 B-25 - 7/29/2007 10:05:40 PM

wildswan

Posts: 95
Joined: 2/4/2006
From: BirminghamWest Midlands, UNITED KINGDOM
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I've got my master airscrew 3 blade 13x8 props.

Stuck one on a test rig onto the e-Flite Power 46 motor.

14.8v 4 cell Flight Power Evo 20
60 amp esc

640watt @ 46amp

A little concerned on a couple of things:

i) two motors is only going to give me 1280watt for a 15.5lb model (82.5watt/lb)
ii) pulling 46amps, the motor is only goouing for 40amp cont, 55amp burst for 30 seconds

I know this is not really intented for aerobatics, will I be okay with this setup?

Jason

(in reply to kahloq)

Post #: 64

RE: New Hangar 9 B-25 - 7/30/2007 8:21:44 AM

kahloq