Eric.Henderson

At the risk of duplicating an existing thread (I did look BTW, but found naught so far), I just finished and flew this Airborne Models, World Models sport scale P-51. It has probably been around for a while but it caught my eye a couple of weeks ago.

Here are the specs.

Wing span: 80.5 in. Flaps and spring loaded retracts. Scaled plastic spinner with aluminum back plate. Wing Area: 1155 sq in. Fuselage Length: 70.5 in. Flying Weight 15 lbs. requires: 2-stroke 1.60 (glow engine), 6-channel radio w/9 servos.

What first caught my attention was thAT IT WOULD need an OS 1.60. Secondly, it is 80.5� in span and hence IMAA legal. Thirdly it was slated to only weight 15 lbs. The latter being important for easy handling at my local field.

I also like the price because it included the retracts. I have noticed that the price of retracts toDay can almost equal the price of the ARF!

It was built as standard as is possible for me. I did some mods to make it easier to assemble etc. It came with a soft mount but I switched to a Hyde mount that I had left over from a pattern ship.

I had an OS 1.60 in a box that I had fitted with an OS 1.40 backplate pump and a servo controlled mixture double lever carb. This would allow me to put the tank on the CG, fit a bigger tank and set the OS 1.60 to manage the infamous lean spot around 1/3rd throttle with a standard muffler.

The design incorporates a canted engine to put the std muffler right under the center of the cowl.

[link=http://ecsvr.com/abm/shopexd.asp?id=910]airborne models[/link]

More pics in next post.

Regards,

Eric.

Eric.Henderson

ARRIVED AT THE FIELD :-)

Eric.Henderson

Engine and nose close ups...

That spinner (supplied) makes the 19 x 8 Mezjlik look a bit small!!!

Eric.Henderson

Before and after test flights. Easy to fly, handles well on ground, lands great with full flap etc.

Dropped to a 17 x 11 for more speed.

Nothing could be finer than a P-51 on-song doing an inboard-wing-low-top-rudder camera pass. Now all I need is a camera person :-(

Regards,

Eric.

aghost

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Looks like you have a "keeper". Congratulations!!

Brian

guppypilot

I've had my World Models GS Mustang for a few years now and I love it. It fly's great and has very good power with the OS 1.6

ramduster

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What do you guys think about a 26cc gas engine for this bird.

golfandfly

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I have a SPE 40 in mine, It flys great

Flyfast1

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I don't think a 26cc gasser will have enough power for most people. It will fly it, but not fast.


-Ed B.

RACJ

Golfandfly,I have SPE40 sitting here NIB.I have considered this Plane in Miss America but have never seen WM warbird here. How is quality of covering material?? Any chance you could post pics of cowl cutting looks for this engine.THANKS

crazy8s

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Eric,

I've been thinking about getting this Mustang for a while now but after staring at your wonderful pictures I have 2 questions.

1. It doesn't come with wing fairings??
2. Are the tail feathers airfoiled??

thanks in advance

ram3500-RCU

My Feedback: (221)

Here is mine with a 45 gas engine in it.

RACJ

ram3500,neat install on that 45. I'm torn between the Miss America and the yellow Rockwell. Is the toughlon covering of good quality and holding up well? THANKS

ram3500-RCU

My Feedback: (221)

Thanks. I intended to cut those pipes back a bit, but I traded my plane for an RTF Gee Bee Y of the same size. Yes, the covering is of good quality. It isn't as transparent as some of the stuff China is using. I was very impressed with the plane overall. The pilot figures they supply looks stupid, but a Great Planes civilian guy with the yellow flight suit looks good as a Rockwell pilot and is inexpensive. The plane is well designed and WM does a superb job with prefab and hardware, and includes a better than average manual as well. The included stock retracts seemed stable with the gas engine up front as well. Balance was no problem with no added dead weight.

Tasman!!!

Hi ram3500-RCU

Just a quick question on you World Models P-51 G.S, was your firewall pre-drilled? Or did you have the drill the firewall yourself to mount the engine?

Regards
Tasman!!!

ram3500-RCU

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I drilled it, but it had cross hairs on it to line up the center thrust angle.

j301

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Anyone know if a SuperTigre G-3250 is adequate for this plane? Has anyone had any experience with this engine?

rc34074

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I have a world GS Mustang - the miss america version. I fly it with a super tiger 2300 engine using a master airscrew 17-8 scimitar prop. This engine is a GREAT engine for this plane. It takes off ok and in the air it is FAST. It slows down well for landing. The 2300 turns 9500 on the ground with this prop (after breakin). It unloads a LOT in the air - you can see the plane accelerate during the first circuit and it is really moving when it comes back down the runway .

I use 10% Omega fuel, with an OS "F" glow plug.

I would not recommend the 3250 - it is designed for lower rpm and while I'm sure it's a good engine and it would fly the plane I doubt it would perform as well as with the 2300. I'm a super tiger fanatic and would have used the 3250 if I thought it would fly the mustang well.

Ed

j301

My Feedback: (12)

[
I have a world GS Mustang - the miss america version. I fly it with a super tiger 2300 engine using a master airscrew 17-8 scimitar prop. This engine is a GREAT engine for this plane. It takes off ok and in the air it is FAST. It slows down well for landing. The 2300 turns 9500 on the ground with this prop (after breakin). It unloads a LOT in the air - you can see the plane accelerate during the first circuit and it is really moving when it comes back down the runway .

I use 10% Omega fuel, with an OS ''F'' glow plug.

I would not recommend the 3250 - it is designed for lower rpm and while I'm sure it's a good engine and it would fly the plane I doubt it would perform as well as with the 2300. I'm a super tiger fanatic and would have used the 3250 if I thought it would fly the mustang well.

Ed
[/quote]
Thanks Ed, sounds like a big block vs. small block issue. I have an older BX1 (1.08), but I dont think it would be quite enough for this size warbird. Definitely would want the faster of the two ST's, and the price seems to be good. What muffler do you think would work best? (in the W.M. P-51 cowl anyway) I am interested in getting one of these arfs, any thoughts on the stock retracts? How did your plane balance out with the 2300? Any other pointers or things to look for would be greatly appriciated.
Thanks again, J.

rc34074

My Feedback: (5)

Thanks Ed, sounds like a big block vs. small block issue. I have an older BX1 (1.08), but I dont think it would be quite enough for this size warbird. Definitely would want the faster of the two ST's, and the price seems to be good. What muffler do you think would work best? (in the W.M. P-51 cowl anyway) I am interested in getting one of these arfs, any thoughts on the stock retracts? How did your plane balance out with the 2300? Any other pointers or things to look for would be greatly appriciated.
Thanks again, J.
[/quote]

The 1.08 would be too small in my opinion.

As far as the muffler to use on the 2300 - I usually break this engine in using the original muffler and an idle bar glow plug. In planes I have typically mounted this engine on its side and used pitts mufflers. I use the large volume pitts mufflers from either bisson or slimline. I usually pinch the outlet tubes on the pitts mufflers so the area of the outlet tubes is close to the same as the outlet area of the original muffler. this lets you tune the engine to have nice operation throughout the throttle range. I have never changed or modified the carbs on this engine and have never had problems tuning the carb/engine.
this is the setup with which i have flown the GS mustang. I did add some weight to the engine mount to balance the plane- a few ounces but I don't recall exactly how much. I also used an aluminum spinner from Dave Brown.

Recently I was told that a Walbro wt499 carb works well on this engine. this carb is the typical walbro carb but it is jetted so the 10% Omega glow fuel works fine in this carb. RCignition told me this and he made me an adaptor to mount this carb on a 2300. I have tested this and it works very well on my test stand, but I have not tested it in flight. My intention is to mount this 2300 inverted on my GS mustang this winter and try it in flight next spring. My goal is to have an inverted engine and fuel tank that is comparable to a gas engine but several pounds lighter than some gas engines. The gas engines I have seen that are comparable weight and performance to the 2300 have ignitions that have batteries to be charged and I like to keep my planes as simple as possible. They also are relatively new and I want to stay with my trusty 2300s.

Retracts- mine came with some fairly decent mechanical retracts which would be ok if you are pretty good at landing or fly from a paved runway. I occasionally mess up my landings and I like oleo struts so I replaced their retracts with Spring Air 400 series retracts with 1/2 inch Robart oleos. I also beefed up the retract rails a bit to handle my sometimes less than perfect landings on my grass field.

I don't specifically recall what I did on this plane other than what I mentioned above- I have had it for 5 years or more and would have to take a close look at it to remember - and its a little hard to get to right now. But in a week or two I will be done with my other project and plan to get the GS out to mount the 2300 in it with the walbro carb. So if you decide to go ahead with this setup I can give you a few more details then.

Ed

j301

My Feedback: (12)

Thanks for the info Ed. You said you want to mount your 2300 inverted, is this to better fit the cowl, or is there a performance improvement? My ratio of landings to brag about verses "that could have gone better" are not always in my favor either, so I will look into the spring air as well. (and I have a paved runway!)

rc34074

My Feedback: (5)

[quote]ORIGINAL: j301

Thanks for the info Ed. You said you want to mount your 2300 inverted, is this to better fit the cowl, or is there a performance improvement? My ratio of landings to brag about verses ''that could have gone better'' are not always in my favor either, so I will look into the spring air as well. (and I have a paved runway!)
[/quote

Inverted mounting is to fit inside the cowl better. The walbro also minimizes issues with fuel tank height and location (distance from the engine). This will allow inverted mounting with minimal fuel feed issues. I have been told that you can get an adaptor for the wt499 from hangar 9. Someone else told me they bought the carb adaptor used on the 26cc gas engine they sell (costs maybe $10-15) and this fits the 2300 and the wt499 fine. I haven't tried this but he said it worked well.

If you go with the wt499 you will need to install a pressure tap on the 2300 to feed pressure pulses to the wt499. I put mine on the backplate, in the center. Works fine on the bench. I will add a picture to my post here to show you my 2300 with the walbro carb.

If you don't mind a yellow mustang World Models has a new yellow GS mustang in their overstock section for only $249. Great deal. Of course if you want you could change the covering and repaint the cowl etc. I haven't checked it this morning though - someone else may have bought it by now.


Ed

NoFlaps

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just finished my WM giant Mustang... I changed the canopy (used a H9)- And added some paint here and there.
This is an NGH 35ccGT rear porting engine in it~

j301

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Well this is a blast from the past, haven't seen anything new on this thread for a long time!
Great job on the mod and paint! I just put an NGH 35 in a CMP P40, should be way more then needed but it balanced out right. Let us know how that motor works for you as I am still waiting on a 3 blade spinner before I re-maiden the P 40.

rc34074

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I am now in the process of upgrading the engine from the 2300 - which flies this plane just fine - to a DLE30. I have seen videos of this plane flying with this engine and I definitley expect a step up in performance with the DLE30. If the DLE30 hadn't come along I would have stuck with the 2300 using the wt499 though - it does just fine too - but the plane was getting a bit tattered and I decided to get it redone as Cripes-A-Mighty 3rd before I moved here to Texas and change the engine to the DLE30 also. It's 8-10 years old but aging well- just like ME . Although I'm a few decades older than 10.

Anyway- I can still fly fine but I've had to rethink some of the ways I do things here in Texas- mainly because of the effect of heat on the batteries when I leave my planes in the garage - gets over 125F in the garage when it's over 100 here - and it damages the batteries, so I'm redoing that part of the GS setup.

For those who like racing and this plane you should check out the scale racing forum. They are starting to use this plane as a standard plane for anew class of racing.

Ed