Official FMS 1400mm P-51D V8 Thread

[xviper]

Just as an FYI, when I was going through all the upgrade motors on my P51 a few years back, here are the radar speeds from each setup to give you an idea of boost in performance. All done with no zip tie mod to the prop.

Stock - 67mph
580kv/4s - 73mph
650kv/4s - 78mph
550kv/6s - 93mph

Very enlightening. The most eye popping increase in speed is the mod to 6s. I think that's what Eflite has tried to do with their newest P-51, 1.5m.

[JamesonC]

Just as an FYI, when I was going through all the upgrade motors on my P51 a few years back, here are the radar speeds from each setup to give you an idea of boost in performance. All done with no zip tie mod to the prop.

Stock - 67mph
580kv/4s - 73mph
650kv/4s - 78mph
550kv/6s - 93mph

[Butchn]

Okay then - glue it is!
Thanks

[OV10]

I have downloaded the colored manual but it says nothing about gluing the wing halves together ... only the hold downs, seems kinda strange. Just wanted to check to make sure that they just didn't leave that part out of the manual. Butch

That's a personal preference with regard to transport and storage capabilities. My fleet always had the wings glued together if the span was 1600mm or less.
I hear ya on strange about gluing the hold downs and not the center line butt edge of the wing...……...just don't make sense. My ol' V8 book says the same as yours (pgs 9-10)
I can hear Doc saying to Kirk...........If you're gonna glue it, well then dammit man just glue it all.

[Butchn]

I have downloaded the colored manual but it says nothing about gluing the wing halves together ... only the hold downs, seems kinda strange. Just wanted to check to make sure that they just didn't leave that part out of the manual. Butch

[Hardway]

Butchn Charlie has the numbers for you!!! LOL Glad you asked and glad to have you on board at the Squawk!! Blue skies! Jerry

[Butchn]

Not really looking for a big gain in performance since I typically fly my Warbirds in a scale like manner - will push the envelope every once in a while with my other planes. Just thought I would like give it a little goose in performance and not have to mess with a different ESC, mount and batteries ... might change my mind after I have flown it a few times - guess I'll find out. Also I guess I have heard that the newer stock LG is not all that bad either??
Thanks for the tips!

[OV10]

Hello - just found this site when looking for more information on the FMS P51 1400mm V8 - have one coming from HH in the next couple of days. I already ordered the 580KV upgrade motor for it and was planing to also do the retract upgrade to the aluminum rails from Small Parts but I am not sure if the upgrade will work for this plane ... would have liked to get them to install during the build but I am thinking they are for the older version ... right?
Thanks

Welcome to the Squawk Butch.
The Small Parts CNC side plate upgrade is absolutely made for this planes FMS RE003 etracts BUT prior to the March 2018 update when FMS did the mods to the side plates.
I was in disbelief when they did that modification and didn't change the part number and kept it the same versus like making it a -1. Goes against basic engineering revision drawing practices.
Terry the owner of Small Parts CNC is a great person to work with and will definitely help you determine if yours is pre mod or not as he has made clear with bold red print on his product page linked below.
http://smallpartscnc.com/index.php?r...product_id=193

Your upgrade to the 580 motor is way old school and is not going to give you the performance you will be satisfied with.
The standard power upgrades is now with the FMS 1400 P-40B motor 4258-kV650 on 4S or the FMS motor 4258-kV460 on 6S which is used on the 1700 Tigercat, 1500 P-47 and the 3000 FOX Glider.
Here is the 4S 650kV links:
HH > https://www.horizonhobby.com/4528-motor-kv650-fmmkv650
FMS > http://www.fmsmodel.com/fms-motor-4258-kv650-predator
Here is the 6S 460kV links:
HH >https://www.horizonhobby.com/motor-4...0mm-p-pdzkv460 They say it is discontinued ???????????? but not FMS...……..maybe because it is used in three planes..
FMS > http://www.fmsmodel.com/predator-motor-4258-kv460

Both of these motor in order to keep the appropriate cowl/spinner spacing will need the prop shaft from the 1400 F3A Olympus.
HH > https://www.horizonhobby.com/4258-motor-shaft-fmmdz005
FMS > http://www.fmsmodel.com/fms-1-4m-f3a-ff117-motor-shaft

Hope this helps
Best regards,

[Butchn]

Hello - just found this site when looking for more information on the FMS P51 1400mm V8 - have one coming from HH in the next couple of days. I already ordered the 580KV upgrade motor for it and was planing to also do the retract upgrade to the aluminum rails from Small Parts but I am not sure if the upgrade will work for this plane ... would have liked to get them to install during the build but I am thinking they are for the older version ... right?
Thanks

[Hardway]

I remember a post, but not who or where.... sorry!

[Hardway]

Thank you Charlie, but not me! LOL. I have had them apart, but no documentation!

[prestonowtm]

Well I sure cant figure it. One works fine the other goes about halfway and stops. If I mess with it I can get it to the full out but then it will not go back down by itself. Makes all the right noises though...so at least I can pretend it's working hahahah

[OV10]

Even though I have done many a repair/clean of FMS/Freewing/Dynam etracts, I did not do a detailed posting about this.

My chemobrain seems to remember that maybe it was Jerry(Hardway) that may have taken the initiative to document his efforts in this

[Grossman56]

Hoy Grossman...off the current topic, did you do a post a while back about retract cleaning? Something about the grease and contacts or such? I have one off this P-51 that will not go back and forth all the way. Took it apart and everything seems to be ok.

No, it wasn't me! I'm not that good at this Sounds like a Charlie Brown (OV10) kinda thing.

Grossman56

[prestonowtm]

Hey, now that's a good idea, I'll have to check in my stock of old landing gear and see if there is something with the same diameter. Unfortunately, this might be a hint of things to come. Try finding gear doors and such. We may be seeing the end of out favorite airplanes.

Grossman56

Hoy Grossman...off the current topic, did you do a post a while back about retract cleaning? Something about the grease and contacts or such? I have one off this P-51 that will not go back and forth all the way. Took it apart and everything seems to be ok.

[curlyculp]

CC, She's fixable in the contents of willingness, time, money, and heart. I usually do an immediate 'tear-down' to assess the real damage followed by a fully committed evening out with 'she whose authority exceeds my rank'. Within a day or two, when I'm feeling better, ahem, the aircraft is looking a bit more fixable. I hope you save it, Sir. Best always, LB

Might as well give it a whirl. I'm pretty handy and have the tools and all that. Worse case I have another box of spare parts. I already know which of my current fleet would get the receiver.

Thanks for the tips and encouragement!

[Elbee]

Thanks. Unfortunately, the airplane is unfixable.

CC, She's fixable in the contents of willingness, time, money, and heart. I usually do an immediate 'tear-down' to assess the real damage followed by a fully committed evening out with 'she whose authority exceeds my rank'. Within a day or two, when I'm feeling better, ahem, the aircraft is looking a bit more fixable. I hope you save it, Sir. Best always, LB

[Hardway]

Just split the cowl with a Dremel tool or carefully with an X-Acto blade. Then just slowly peel it off. Take you time and the glue will start to let go... You can fix it Bro!! I wish you were closer, and I would do it for you!!! Give it a try. If you destroy it, well, it was broke anyway!!! Jerry

[curlyculp]

This is a similar process to changing the motor mount on the big Corsair. You have to split the fuse at the nose just enough to work the mount out and in. It doesn't have to be split all the way down the plane. I did it myself using wedges but an extra set of hands is helpful. The natural glued seam is the best place to split it. Once glued back together, it'll be stronger than it was before. Of course, garbaging it will allow you to buy new plane.

How do you remove the cowl?

[xviper]

Thanks. Unfortunately, the airplane is unfixable. They sell a replacement motor mount, but I see no way to put it in without splitting the fuselage in two to remove the old and insert the new.

This is a similar process to changing the motor mount on the big Corsair. You have to split the fuse at the nose just enough to work the mount out and in. It doesn't have to be split all the way down the plane. I did it myself using wedges but an extra set of hands is helpful. The natural glued seam is the best place to split it. Once glued back together, it'll be stronger than it was before. Of course, garbaging it will allow you to buy new plane.