SpinnerRow

I had a DLE 20 in a World Models .60 sized P-51 and had it set up for speed. Ran that combo for over a year and then crashed it in a cross wind landing when a gust picked a wing up and cartwheeled it. I plan on buying a [link=http://www.airborne-models.com/html/productdetails.asp?ProductID=21]World Models Giant Scale P-51[/link] as my next speed project. I had assumed I would put a DLE 30 on it and a steep pitch prop but wanted to ask the masses if there was a better alternative for more RPMs and steep pitched props.

Wing Span: 80 in.
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.

Antique

My Feedback: (4)

If you want REAL speed you might want to revise your engine size upwards...No 17 lb airplane is going to go very fast with a 30-40cc gasser...ANY gasser...It would take at least a 12 pitch prop at over 9000 rpm...I would think maybe an MVVS in that size would be the best for high pitch...What do you think, Pe Reivers ?

SpinnerRow

I'd like to see 100mph. Not sure if that is what you call "real speed" or not. Not sure a 50 would fit in there with a Pitts muffler without cutting it all up.

Maybe a ZDZ 40??

Here's a vid of one with a DLE 30 in it.

http://youtu.be/lTRoJsuwLug

MTK

A ZDZ40 will not give you what you want. It's lower revving and a bit anemic

There aren't many choices for this specific application. Whatever choice engine you go with, you will get more output with a piped set-up, but in this plane, a pipe probably won't fit.

One of the highest revving engines in this size is the SAP180 but on muffler alone may lack the torque to turn diameter and pitch. Nevertheless, I turn the SAP around 9K on pipe with a 16x12 prop, in a pattern plane and get just about 100 mph out of it, except in my application 100mph buys me absolutely nothing. The engine just loves running there so that's why I'm running it there. Wing area is about the same as what you show for the stang but weight is 11 pounds, so your ability to go around pylons will be handicapped at 15 lbs.

Putting an even smaller prop with higher pitch on the SAP is definitely doable. You could cut a 16x14 or 16x16 apc down 15" diameter and get the revs to 9500 or so. Syssa has been doing that on his racer for a couple years now, but again the racer is a little smaller and weighs only around 12 lbs

MetallicaJunkie

a 50cc with an 18x14 prop?

airraptor

My Feedback: (66)

I have a DLE 30 in a H9 miss america. full of fuel its 9.4 lbs i run a APC 16x14 prop at 8,300-8,400. it pulls my plane around 110-115 With that said you will not see 80 mph in the larger WM mustang.

Also are you positve a 50+cc engine will not fit. I know one guy that is putting a 55 in his.

If you really want that plane over 100 you will need a EVO 58 in it. i think the new racing class of warbirds are over 130 with that engine. Antique might know more about it.

Also the SYSSA SAp180 does rev more than the DLE but it will still not get you more than the DLE 30 in this plane.

SpinnerRow

I won't be positive until I get a plane and do some measuring. If a 55 would fit, that is they way I would go. I just assumed it wouldn't fit.

Antique

My Feedback: (4)

We are usihg Gold Edition Goldberg P51s in our new race class..Any gasser up to 65cc, no tuned pipes.G62s work very well, 9000 rpm, 19x14 APC T6 race props..Do the math
&@;:/crs TF, not Goldberg.

Truckracer

My Feedback: (19)

I have to side with Antique on this one. You can't beat the G62 or something similar for high RPM performance. None of the rear intake engines will come close as most tend to be torquers rather than high RPM performers. Another alternative might be a Taurus 52 .... good smooth power and it likes to toot! I can't imagine any of the cantilever crank engines being very happy at high RPM.

airraptor

My Feedback: (66)

RC does the G-62 out perform the MVVS/EVO58?

3136

I have the ridge runner wm stang too.
It has a dle 30, if you tilt it, it will fit in without having to cut the side of the cowl like the fellow did in that video.
The pic is of my stang and I'm holding a dle 55 next to it.
I like the way it flies, if you really want speed get a pylon racer, this is meant to be a scale plane.
I personally would worry about putting too many g forces on an arf airframe where you don't know the integrity of all the glue joints.
I think the 55 wouldn't fit well.

3136

Here is a pic of the stang and a pte36r, I have been testing this in another airframe and plan to put it in the stang.
With the stock exhaust they are pretty noisy though.

Antique

My Feedback: (4)

Kinda close with no pipe on either, otherwise no.....Have run both..

Sessholvlaru

KMP Sea Fury, 16.5 pounds. My DLE 30 with an 18x10 prop hauls it handily. It sees triple digits out of a shallow dive.

It originally had an O.S. 160FX in it and was slightly faster. If you don't mind glow the 160 kicks arse.

Texastbird

Yeah, I wanted to step in and say that if you want speed at any cost, then a big glow 2 stroke would give some awesome performance at the cost of mucho fuel burned and the mess that goes along with it. A few years back a fellow flew an AT6 about that size with a big Moki on it and it would really scream. Not my cup of tea, though.

Antique

My Feedback: (4)

A big ZDZ 210 will go 250+ mph on a 100 inch wingspan P51 on LOTS of glow fuel....AND $$$$...
Speed is expensive, how fast do you want to go ?
www.usrainfo.org

SpinnerRow

Maybe I need a smaller plane. I would like to stick with a 30-35cc if I can - for cost reasons. The ESM P-51 that TroyBuilt sells is 72". Maybe that is more my "speed".

closetguy

My Feedback: (13)

i wish we had this type of flying arond where i am at.

Antique

My Feedback: (4)

We had this racing at Ashtabula, Ohio for 10 years...[

closetguy

My Feedback: (13)

a day late and a dollar short,figures.

airraptor

My Feedback: (66)

Spinner some of the guys at the field are buy those ESM planes now in th 70-75" range and putting the DLE 30 in them. most are in the 11-13lb range. Dont expect 100mph though. A nice scale speed though at 3/4 thottle on a 18x8

SpinnerRow

Yea, I've started to look at those. I really like the looks of their P-51B:



Though not a speed demon, this is a pretty one as well. A World Models P-47:

Wing Span: 70 in / 1780 mm
Wing Area: 893 sq in / 57.6 sq dm
Flying Weight: 10.7 lbs / 4850 g
Fuselage Length: 62 in / 1580 mm
Engine Required: 4-stroke 1.20 engine
Radio Required: 6-channel radio w/ 7 standard servos and 2 low profile retract servos

rc34074

My Feedback: (5)

In my club the esm 70-72 inch warbirds are coming out in the 15 lb + range. Most are running the dle30 in them but there is at least one with the SAP180 (he has the spitfire). The mustang is notorious for having the cg way too far back in the instructions.

The world p47 would be a good bit lighter than that.

Ed

SpinnerRow

Good god, that is portly! My 65" WM P-51 came out at 10.5lbs and was a missile with a DLE 20 on it.

Yea, I might have to go that route then.