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Great Planes Spitfire 39" ARF

Old 07-26-2007, 02:00 AM
  #26  
fastie
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Murph - thanks for the rep power!
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Old 07-26-2007, 02:22 AM
  #27  
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Default Combat

Originally two other guys at my flying field wanted to do combat so one built the Corsair and the other an ME-109. After we built and flew them we didn't want to "fight" and just wanted to fly them.

It is a testament to how fun they are to fly.

Get one. Get one NOW.
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Old 07-26-2007, 03:06 AM
  #28  
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Cool Unpacked the box for the Spitfire

OK, here are some pics of the Spitfire. Everything was packaged really nice and secure. Quality looks outstanding. Maybe a heavy plane with small wings - but this is one awesome plane.

I'll post more when I start the build -- now I need to decide gas or electric ??? hmmmm ??
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Old 07-26-2007, 03:15 AM
  #29  
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Default confirmed weight

Originally Posted by fastie View Post
Thanks fr the excellent comments - I really was looking for an electric warbird to step-up from the MM Magpie that I have. This just seem a little too ambitious. But, I guess I could hold it and wait til I'm ready.

Be interested if anyone has set this up for electric. Not in a club right now (not sure who does combat in my area - central maryland) so I would need help with gas and all that....

Learning tons from this forum though and will be VERY careful before I purchase a plane in the future and take the time to better understand the characteristics before I buy. I think many amateurs (maybe I'm still a beginner) make this mistake.

I did send an e-mail to Great Planes to try to confirm the weight - but no reply. Suspect all of your conclusions on it being a combat plane and really a glow plane make sense.

Oh well I think the extra 330S would have been a better choice.

Great Planes returned my e-mail and confirmed weight - I will weigh before mounting engine - Biridiman gives us a good idea though that it maybe a tad lighter than the specs show.
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Old 07-26-2007, 03:16 AM
  #30  
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If you go electric........don't underpower her.

If it was me, I'd use something like this.
http://www.horizonhobby.com/Products...odID=EFLM4032A

But that is just me. (I like an overpowered model!!)

I'm sure most guys would recommend something a little more like:
http://www.horizonhobby.com/Products...odID=EFLM4025A

Best of luck with your eventual build!!!
The Spitfire is definately a sweet warbird!!

Murph.........
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Old 07-26-2007, 03:32 AM
  #31  
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Default E-power

Originally Posted by Biplane Murphy View Post
If you go electric........don't underpower her.

If it was me, I'd use something like this.
http://www.horizonhobby.com/Products...odID=EFLM4032A

But that is just me. (I like an overpowered model!!)

I'm sure most guys would recommend something a little more like:
http://www.horizonhobby.com/Products...odID=EFLM4025A

Best of luck with your eventual build!!!
The Spitfire is definately a sweet warbird!!

Murph.........
Thanks for the recommendations - I like the stronger engine as well and it is only .3 oz heavier! The motor recommended by Great Planes is:

http://www2.towerhobbies.com/cgi-bin...?&I=LXLWU1&P=V

It's 1/3rd of the weight.

So what is more important - weight of engine or amount of thrust. My guess is you need to calculate the amount of thrust for the wingloading to make it fly well? but, how do you do this. I want to keep the plane as light as possible if I go electric and agree I want good power. Be good to do a graph and figure out a good choice with some data.....that's the nerd in me! Any good references to do these calculations?
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Old 07-26-2007, 04:01 AM
  #32  
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The easy way to figure it out is WATTS per POUND!!!

For trainers...70 watts per pound.
for scale ....about 100 watts per pound
sport ....... 120 watts per pound.
3-d.........170+ watts per pound.

These figures are subjective, and each guy has his own opinion.

say your spitfire all up weight is 2 1/2 lbs.........
the bare minimum would be 250 watts.
500 watts would be much better.
700 watts would be phenomenal.

the power25 says it does up to 550 watts
the power32 says it does up to 700 watts.:<

I always seem to way overpower my planes, but that is how i like it!!!
Alot of guys follow the exact recomendations of the airframe maker, thats how they like it.

In the end it is you who has to fly it, so equip it how you will be happy!!

Best of luck........Murph.........

Last edited by Biplane Murphy; 07-26-2007 at 04:17 AM.
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Old 07-26-2007, 04:08 AM
  #33  
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Looking at the rimfire you linked to........I would think it is a little small..........It'll fly it, but not as well as the power25 by e-flite.

The specs are similar to mey e-flite 480 motors with some more power (Watts). but the size and weight and prop recommendations are nearly identical.

I would go bigger myself, But like I said.......It's about what you want for performance.........

Murph.......
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Old 07-26-2007, 04:17 AM
  #34  
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Check out the Watts on these smaller ones........

Power 15...
http://www.horizonhobby.com/Products...odID=EFLM4015A

and power 10
http://www.horizonhobby.com/Products...odID=EFLM4010A

The 10 size has almost identical watts as the rimfire!!! 375 vs.388

Murph..........
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Old 07-26-2007, 05:00 PM
  #35  
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Went over to my buddys house last night (he has the P-51), peckerhead already has a Spit sitting in the box

Anyone know anything about the Rimfire motor that's recommended? 1450 is a lot higher KV than I would have thought.
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Old 07-26-2007, 05:08 PM
  #36  
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It looks small!!......Like a hopped up 480. IMHO!!
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Old 07-27-2007, 01:16 AM
  #37  
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Default Motor Selection

Murph - thanks for all the good motor advice. I will start the build and weigh the parts. I think going to a larger motor is a good idea.

One consideration though maybe battery and subsequent battery weight which would need to be considered.

Oh yeah, can't forget about the miniture machine guns I will attach -- just kidding
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Old 07-27-2007, 01:24 AM
  #38  
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Check the # cells Lipo the motors can handle, and the Kv ratings and prop sizes.....The big lipo's can get expensive fast!!!

Good luck etc.....Murph......
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Old 07-27-2007, 03:16 PM
  #39  
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I was very disapointed when TH dropped the Rippers Spit and basically replaced it with this one. The good news is you can still get the Rippers Style Spitty from United Hobbies.

Its bigger then the one Tower Offers so it very well may cost you more to put it in the air. You will be rewarded by a sweet flying plane.

Just another option if this one does not work out.

Tommy D

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Old 07-28-2007, 06:11 PM
  #40  
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Default Too bad

[quote=tommytorino;235450]I was very disapointed when TH dropped the Rippers Spit and basically replaced it with this one. The good news is you can still get the Rippers Style Spitty from United Hobbies..........]

From the glow equipment on the table - did you set this up for gas power?
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Old 08-04-2009, 07:29 AM
  #41  
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Default grave digger

digging up this old thread....

I ordered this plane. I plan on using my 45A Scorpion ESC and 3020-12 Scorpion Motor with a 3S Lipo. When I use ScorpionCalc software, I can get about 500in/355out watts using an 11x8 prop MAX at 45amps (not feasible on my ESC). If I use the suggested kit 9x6 prop, my setup will only put 330/250 watts @ 30amps.

Will it fly OK with 330in/250out watts?


Looks like I might want a 10x8 prop to put me at 40amps, 450in/330out watts, with a speed of 68mph and thrust of 57oz.


I also plan on hitting the plane with a light coat of flat clear spray, to make it look more scale.
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Old 08-04-2009, 05:37 PM
  #42  
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I did some more homework and decided to put a 3-Blade 9x7 prop up front. I think it will look more scale after I paint it, and it will give me tons of bite. I also got a spinner and tailwheel that I might use.

http://www3.towerhobbies.com/cgi-bin...&P=WR&I=LXHHZ2

http://www3.towerhobbies.com/cgi-bin...&I=LXE155&P=ML

http://www3.towerhobbies.com/cgi-bin...&I=LXMRK6&P=ML

I'll post the build when it all arrives.
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Old 08-09-2009, 04:52 AM
  #43  
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Here she is mocked up in my garage "hangar". I needed to chop about 1.25" off the motor pylon to fit the long Scorpion 3020-12 motor in the cowl. What great looking plane. I am on the fence about spraying it with flat clear. I want the flat paint scheme but I'm not sure it will stick. I will test it out on some spare covering.

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Old 08-10-2009, 08:04 PM
  #44  
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A shot of the shortened engine mount and the plane after a couple of coats of Top-Flite flat clear spray. The motor is almost as long as the Merlin was!

Pre-stickers. I next applied the stickers and also sprayed one more coat of flat clear.



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Old 08-13-2009, 06:44 PM
  #45  
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Finished! AUW with 2200 Lipo is 39.5oz. CG was dead on. No ballast. Maiden coming soon.

[media]http://dcerutti.smugmug.com/photos/618944020_eYUcE-X3.jpg[/media]

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Old 08-18-2009, 03:25 AM
  #46  
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Maidened it finally. Flys great except that landing and taking off the grass tends to cause wingovers. I am even using 3" wheels! I had to repair the left landing gear mount inside the wing because the grass tore it loose.

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Old 08-28-2009, 03:38 AM
  #47  
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Hi Dave, What servo choice did you make??? I'm wondering if a smaller servo like a Hitec HS 65 might be adequate on the ailerons. 25 oz/in. torque. I have a pair of HS 85BB 's for the tail duties.
What does that motor weigh and what does your 2200 weigh?
I have a power system to drop in and think I'm going to hit the upper weight limit with it though.
4S 3700 Flightpower, Hacker A12-XL, 45 amp ESC. It used to drag a 71.5" Cub around quite smartly on 3S pack. THis baby ought to really scream. You said you broke the gear mounts already so I soaked the area with Gorilla glue to really stiffen it all up with FOAM.
I also wonder what 3 blade prop would go well with a 650 watt, 700 kv setup on 4S?


If all goes well this bird will be flying at the NEAT Fair in Downsville NY Sept 18,19,20.


Great job on your plane!

Alan
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Old 08-28-2009, 04:08 AM
  #48  
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I have this same plane. My experience has been that it does NOT
like to fly at low speeds. Kinda drops like a brick. I used the Rimfire 1450 Kv motor with a 3S 2200 mah Lipo, a silver series 45A speed control and Futaba S3115 servos.

I haven't got it balanced out right yet so it still flys pretty squirlly but the motor seems to have plenty of power though.

It is a lot touchier to fly than any of my other warbirds.
It will take a fair amount of abuse with only minor damage after a few cartwheels.

I only hope it will hold together long enough for me to really get it trimmed out and balanced good, as I think it has real possibilities for combat.
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Old 08-28-2009, 04:33 AM
  #49  
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Mine flies very fast!!! I like it but you have to keep up with it. I put a Turnigy in it with HS-81 servos for rudder and elevator and HS-55s for the ailerons. No problems yet and I have probably 30-40 flights on mine. Just don't slow it down too much or it will tip stall. Steve
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Old 08-28-2009, 04:42 AM
  #50  
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Hey brothers in arms....

I ended up using these servos in my GP Spit.

Hobbico CS-12MG Servo Hi-Speed Metal Gear Micro U
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXLN97

My Motor is this one:
http://www.innov8tivedesigns.com/pro...products_id=76

I Maidened with a 12x6 prop but I have switched to a 3-Blade 9x7 (untested still).

It is a fast plane. I can't believe how soon I need to bank and pull it around when I fly around the field. It gets very small, very quickly!

Here is the new prop setup and the larger wheels that I still need to test:
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