Official FMS 1400mm P-40B Warhawk Thread

[Cchrissyv1]

Hello all!
It has been a few months, but I was able to get about 5 flights with this wardbird. Everything went great, except one of the main landing gear does not retract anymore :face_with_symbols_o:rage: And of course to my luck, the retract set for the main landing gear specifically for this plane has been discontinued. Now I have yet to do any troubleshooting, but I am praying it has something to do with that silly control board. If not, it looks I am stuck with a plane that does not retract like it should and will look funny in the air. Does anyone know if there are similar retract sets out there I can use to replace if it is indeed the retract that is bad? I get it, these things happen. But come on, man! Only 5 flights in and I am already looking at a technical issue.

[paladin]

http://www.fmsmodel.com/e-retrac-140...n-landing-gear

http://www.fmsmodel.com/fms-1400mm-p...ng-gear-system

they r not cheep.

Joe

[FLY BOY]

Try Horizon Hobby, Amain Hobby, rc castle for landing gear. But I would check to see if your control board is the problem before dipping into your wallet. Easy check, just by pass the control board with an old school Y connector by plugging the retracts straight into the receiver. I had to do it on mine for a simular issue. Now my retracts are getting full power and work like a champ

[ICM]

Just picked up a used FMS P-40B 1400 (current model) with a Spektum AR610 RX. I now have to set it up on my DX9. I looked at the online manual which gives suggested ail/ele/rud rates for in terms of mm and says nothing about flap set up. Spektrum uses %'s for rates. I know I could fiddle with %'s and measurements to get to the recommended mm rates, but not sure if the manual's recommended rates are a good starting point.. Wondering if any Spectrum users here have suggested rates in terms of %'s, as well as flap settings. Thanks for any help.

[OV10]

Just picked up a used FMS P-40B 1400 (current model) with a Spektum AR610 RX. I now have to set it up on my DX9. I looked at the online manual which gives suggested ail/ele/rud rates for in terms of mm and says nothing about flap set up. Spektrum uses %'s for rates. I know I could fiddle with %'s and measurements to get to the recommended mm rates, but not sure if the manual's recommended rates are a good starting point.. Wondering if any Spectrum users here have suggested rates in terms of %'s, as well as flap settings. Thanks for any help.

Straight from my DX9 Flap System for the FMS P-40B
…........Flap Elev
Pos 0 100% 0%
Pos 1 25% -5%
Pos 2 -50% -10%
Switch D
Speed: 3.0.s

Rates:
Aileron 100% with Expo 30%
Elev 50/75/100% all with Expo 30%
Rud 60/80/100% all with Expo 30%

Servo travel
Ail => 80 Elev => 100 Rud => 110

[ICM]

Thanks OV10. Are your control rods connected to the holes in the servo arms and control horns as per the manual? The closest plane to the P-40 I fly is my E-flite AT-6 1500, so this is my first "real" warbird. When weather permits, I plan on maidening on my club grass field with a Roaring Top 4s 4000 at low rates with cg at 70-75 in order to get a feel for the plane. Sound ok to you?

[OV10]

Thanks OV10. Are your control rods connected to the holes in the servo arms and control horns as per the manual? Yes per the illustrations on Pg 9 The closest plane to the P-40 I fly is my E-flite AT-6 1500, so this is my first "real" warbird. When weather permits, I plan on maidening on my club grass field with a Roaring Top 4s 4000 at low rates with cg at 70-75 in order to get a feel for the plane. Sound ok to you?

This bird does require full(high) rate Elevator to keep the tail pinned during taxi and initial T/O rollout so as not to nose over and prop strike

[Grossman56]

Yep, she does like to try and stand on her nose. Other than that, an amazing plane with either 4s or CB's 6s mod.

Grossman56

[ICM]

Thanks for the tip. I'll adjust the elevator for taxi and T/O and report on the maiden. Given snow on the ground with no relief in sight, it might be awhile. On the bright side, the skiing's been great!

[ICM]

Donno why I thought I had a 4s 4000 to stick in this bird. Just checked winter storage voltage on my lipos and discovered I only have a Spektrum 4s 5000 30c which i got as a freebie with my EC1500 and a Roaring Top 4s 3300 35c. I like to fly my scale planes like the P-40B at scale speeds or a bit more, perform scale maneuvers and get 5-7 minute flight times, so the 3300 might be ok, but more likely I'll get 2 new lipos. Since I've become partial to Roaring Tops lately, considering 4s 3700 45c and 4300 35c. Sound about right?

[OV10]

Donno why I thought I had a 4s 4000 to stick in this bird. Just checked winter storage voltage on my lipos and discovered I only have a Spektrum 4s 5000 30c which i got as a freebie with my EC1500 and a Roaring Top 4s 3300 35c. I like to fly my scale planes like the P-40B at scale speeds or a bit more, perform scale maneuvers and get 5-7 minute flight times, so the 3300 might be ok, but more likely I'll get 2 new lipos. Since I've become partial to Roaring Tops lately, considering 4s 3700 45c and 4300 35c. Sound about right?

The 3700-4300 RT's are basically in the same 4S mAh range that was recommended of 3600-4000 by MRC when they carried the P-40B.
PS...…...FMS recommended a 3300mAh 35C
I wouldn't get too hung up about going over the 4000 by even as much as a 1000 to a 5000mAh battery.
When I did the 6S upgrade to mine I used a 4500 6S which weighed in approx. 640 grams.
A 4000 4S weighs 388 grams and a 5000 4S weighs 482 grams.
So as you can see the 5000 is only 100 grams more than the 4000 but 158 less than my 6S set up.
This plane handled the extra weight with no issue and maintaining the CG was no issue because it was a simple matter of sliding the battery aft in the battery tray.
So in summary, don't be nervous/afraid to use the Spektrum 5000
If you're jazzing to get some more RT "power bricks" , I would recommend the 4500 35C.
The 3700 is gonna be slack on flight time and the 45C rating is more than most prop jobs require.

Just remembered ...…….. because I lost all my 6S batteries in the infamous fleet reduction inferno of 2018 so I rebuilt my battery support system with 2S&3S 5000mAh batteries.
When I flew this bird at a warbird event this past fall I used my new battery structure of 2x3S 5000 in series.
Each @ 372 grams x 2 = 744 grams.
That P-40B didn't mind at all.
Happy flying

[ICM]

Thanks OV10. BTW, there is no RT 4s 4500 35c, only a 45c. I'll try the Spectrum 5000 and order the RT 4300 35c and/or maybe the Admiral 4000. I generally like to have at least 2 batteries for a plane.

[ICM]

BTW OV10, I note you have your AIL rates at 100% High/Mid/Low but with servo travel at 80%. Not sure why. Wouldn't you get the same result by setting the Ail rates at 80%?

[OV10]

BTW OV10, I note you have your AIL rates at 100% High/Mid/Low but with servo travel at 80%. Not sure why. Wouldn't you get the same result by setting the Ail rates at 80%?

It is all about linearity of stick travel

[ICM]

OK, I'll bite. Please explain?

[OV10]

The reverse as you inquire would essentially capture the same effect but the linearity is affected more by the expo this way, it is subtle but it is there.
ps …… there is also no low/mid/high rates enabled on the AIL( switch selection is inhibited )

[Grossman56]

So, after coming home from Nefi 2017, I ordered a new fuselage, new wings, new vertical stab and canopy hatch among other things and rebuilt my crashed P-40. The broken fuse and wings have been sitting in a box downstairs since then. A couple of days ago, just out of shear boredom, I pulled out the fuse to have a look at whether it could be repaired or not. The plane augured in at Nefi while in the infamous Nefi Triangle and basically went in nose first although I may have hit at a slightly better angle as I was pulling back on the stick at the time! At any rate, the result was that the nose was stressed and the fuse was broken on the starboard side right where the front of the hatch fits into the fuse. From the nose , back, she was in good shape, so a project was born. Epoxy took care of the break in a short time and some putty work to eliminate the stress marks took care of a lot of the damage. I've had two rolls of aluminum (read chrome) duct tape sitting around the house since before the Flite Metal days with My Little Gal II and decided to use it for this project to see if I could recreate a fuse something like this.....


Now, so far I've covered one side with the tape up to the break and it looks really good, I'm in the process of sanding and reshaping the nose now.
Unfortunately, the wings are right offs as the centers were completely mangled, so they would need replacing. The horizontal stab is on my P-40 rebuild from 2017, I do have a brand new canopy/hatch, motor and ESC along with props and spinners. The servos are also in the other P-40 and by the time I bought everything in order to get her into the air, it would cost less than $50 over a new kit!
Right now, the funds aren't available for a flyable bird, but I thought I'd put it out there to see if anyone had a spare set of wings or horizontal stab, used, new , whatever. Otherwise she'll be hanging from the ceiling for awhile. Which is ok as it is, for right now, just something to while away the hours and keep the creative juices flowing.
I'll keep an update going with some pics of the progress as well.

Grossman56

[Grossman56]

So, as of this morning, here's where she stands, did some more work after taking these and the nose is pretty well complete, a couple of small repairs before covering to complete on side. Anyway...


Grossman56

[Elbee]

Grossman56, Now that's an impressive rebuild. Really diggin' the 'chrome' work. Best, LB

[Grossman56]

Thanks LB, it's just something to do since the wind is up!
Here's the result of today's work..

Not the easiest stuff to work with and neither is the Flite Metal, but hey, I wasn't going for show quality, more of a learning experience.
Just to show what has been done so far, here's the other side that hasn't been 'chromed' yet, BTW, I am saving the kitties!!


Grossman56