P-40 Warhawk maidened (hanger 9)

[the Swamp Fox]

Hey all ,

took it up last night .

very nice flyer . no bad habits and quite nimble for a big gal .

hacker B-50 10 xl
5s3p 6750
hacker master 70
ubec
Dave Brown 3 1/2" aluminum spinner
apc 16x10
hitec 8ch rx ?

I get about 950 watts @ 50a Static ...
maiden was 6 min and the pack took back about 1800 mah
Not a rocket, but ample speed , awesome sound ,and performs very smooth warbird manuevers .
pics /vid to come .

oops on the landing,,,need a better runway ,,,ahem - :(

http://www.back40flyers.com/flightvids/P-40%20swamp.WMV
take care all .

[nik_leeson]

Nice plane swamp,...I never liked the look of a perfectly chromed spinner myself. You left out the gear box ratio...I assume it was somewhere in the 3.2 range...(am I correct). Also,...what batteries did you use and were they easy to fit into the p-40?

I have 3 different 60 sized warbirds,.. two of them the battery fit has been easy but my Great Planes Stuka was a pain to balance properly.

[the Swamp Fox]

Hi Nik,
Thanks.

pack is a single 5s3p 6750 from maxamps .. I bought it for a 90mm edf but went ahead and built the P-40 1st . I wanted 6s ,,,but performance is good enough for me until I can afford more batts .

The pack is VERY long , and not the best choice ,but a little jury rigging gets it secured in there nicely ,butted up to the firewall.

I hear ya on the spinner , It doesn't look too shiny in person though , but the weight of it gets the CG perfect with no dead weight added .

don't know the gear ratio , motor's on loan from a buddy who does piles of conversions and he couldn't remember ... hehe

He also did the GP Stuka and it flew great .

Continued good luck with all your planes and upcoming projects . I'm going to do the upcoming H9 P-47 .60 with a little more under the cowl this time.

take care ~

:)

[pda4you]

Awe man.....I love this plane....

Lot of $$$ for this setup. Great job Swamp Fox.....

Mike

[DougC]

Gotta love them P-40's !

Looks quite realistic in flight; nice big loops and great slow rolls.

Nice job, thanks for posting.

[hornant]

Good job. Electic is the way to go with these things. I have found that they are a bit easier to land if you keep them a little faster and wheel them on on the mains. A harder strip could help as well. ;)

[drksyd]

If the gb is a black planetary unit, it's probably the Maxon 3.7:1.
Good job on the maiden. How's the flying characteristics? I have one I'll fly with an Axi 4130 but won't get to it soon.
Landing on the mains then bleeding off to drop the tail is hard on these planes. If you have to land on grass or anything other than a nice paved runway it'll be rare.

[drksyd]

Sorry, take that back. Gearing should be in the 6.x:1 area.

[the Swamp Fox]

hehe,

yup, was not lost on me that this is NOT the best place to fly and "land" a .60 size .but sometimes I just can't wait I'm not the best flyer out there ,but I can generally get 'em down ok ... no damage on that dork,,,, so ,,, all good .

. The plane flies wonderfully at all speeds . Again not sure of the ratio ... prolly around 6:1 like ya say ,,, the GB came preinstalled , motors a loner with option to buy ...

I should be going to a paved strip tomorrow with a bud with the same plane ...

Vid could be interesting ..

take care all ~

[drksyd]

Good luck on the the paved strip. The hardest part is coming in hot enough to land on the mains.
If you get a deal on the Hacker that'll be good but I think the 14 XL is what most use for the .60 size planes.

[the Swamp Fox]

Thanks for the info darksyd,



Just got back ..... OPPRESSIVE HEAT !

The old, used ESC I had in there went out on a low pass .. had to do a gear up landing in some tall grass... lucky this thing is such a floater ,,, minor cowl damage + prop . * Whew *

My friend flew his next ,Hacker C50 powered .... did great ... it was so hot his tires and melted a little. :eek: After landing ,the plane glitched and went dead .Strange.

We decided no more flying @ 98F+ with 90% humidity ,,, I mean it was HOT.
heat index in the 110F range .

Yup, got a GREAT deal on the motor even on 5s it hops off the ground in no time . My bud has converted just about all the the H9 warbirds he says the P-40 is the nicest flyer of the bunch .

I'll put his video up later

Take care all ~

[drksyd]

Melted tires! Yikes. I'd be out there to, gotta get one flight in.
Good thing you were low when the esc died, it would be sad to see it go in after you just finished it.
My P-51 flew great but that was with a Saito .91. The Corsair wasn't bad but the 4120 didn't have quite enough to bring out it's performance and that plane didn't have a very long life span. Can't wait to get the P-40 up but honestly that's next year (it's an advance on my x-mas gift). Only gripe with the P-40 is the covering, you just can't have shiny camo. Maybe I'll try and scuff it a little so it doesn't shine.

[the Swamp Fox]

Only gripe with the P-40 is the covering, you just can't have shiny camo

Yeah , this one won't win any scale awards for sure ;) ,,,, but it flies good .

Seen a nicely built and finished TF P-40 next to it , no comparison . the TF was just too heavy to convert $$$$ .

Good luck with yours, x-mas is never too far away :)

~ Take care


Here's yesterdays video ,,,this is mookie1's conversion ....

http://www.back40flyers.com/flightvids/P40mookie1(2).WMV

[drksyd]

Nice landing, looked like it would have hit hard but it was a nice landing on the mains.

[TRP]

Hello gents,

Looks awesome in the air. Sounds great too.

What's the AUW?

Thank you for posting the video - it's awesome. I'm using almost the same motor (11xl with the black Hacker/Maxxon Gearbox geared at 5.2:1) on my TopFlight P47. I hope to get similar performance.

Thanks again & Nice work,

TRP

[the Swamp Fox]

thanks TRP,

I got the motor from a budddy . Pulled the heatsink off when I went to get all the connections resoldered . I found a bad solder joint on a motor connector.That was the culprit ,almost cost me the plane...... turns out it's a B50 9XL.

but she's all ready to go again ...


I have a couple of 3s3p 6000's on the way to series connect and get a little more pull ... I'll post the #'s when I run it up . Now I'm around 950 watts



I have to run by the tackle shop today, I'll see if they have a decent scale.

I have no idea what my AUW is :O

take care and continued good luck with the Jug :)

[TRP]

I'll post some photos in it's own thread soon. She's really coming together. I need to figure out a way to mount the motor with the heat sink on it. I'm pretty sure I've that that licked. I should be able to get the motor mounted up this week.

Should be fun.
Ted

[the Swamp Fox]

Can't wait to see your progress ,,

I'm using this adjustable mount I picked up from esprit ,,,

you can slide the heatsink fore/ aft and move the rear bolts to clear the heatsink.... that's what I had to do anyway .



I have since enlarged the hole in the firewall and tie wrapped the motor per instructions

[TRP]

TSF,

That's a great looking mount and I might have to revert to using one. I'm trying to be able to preserve the mock radial motor in the P47. Because of the depth of the cowl lip, the prop adaptor, and that mount - if I used that mount I'd have to carve out a huge hole in the radial. I'll figure somthing out. I might just have to pitch the radial. :(

I'm sure I can think of something.

Thanks for the photo.

Ted

[the Swamp Fox]

what is your distance from firewall to prop ? the mount can be cut down along the sides that protrude forward . You may not be able to use the heatsink.

had to do that on a smaller plane .

take care~

[TRP]

I think I may have the solution for it. I'll post photos of the solution once I get it all together.

Ted

[Pilot44]

Eh Henry,

Yup. Like that P40, I had the VQ P40 kit, sold it. Wish I hadn't. But still have the VQ Mig 3 so gonna do it up lectric bout the same setup you have in the P40.

Meantime. Headed up to the NEAT fair in a couple of weeks, see how much dough I can leave there...... :rolleyes:

Jim

[TRP]

I managed to make some pretty good progress on my '47 last night. I got the motor all mounted up and the cowl on.

Ted

[the Swamp Fox]

heya Jim,

Could use a few more warm bodies in here... know there's alot more conversions going on out there ...

just got my TP prolite packs in today 3s3p 6000x2 . moving up to 6s in the '40 . :)

that MiG is cool and not a plane you see modeled everyday .
good luck with it .. the big electrics are really fun..

hope you are doing well . Drop a line.

Take care ~
H

Looks real nice Ted !



Oh yeah got her weighed in ...

8lbs 9.oz AUW ready to fly .

[P51B]

TSF,
While I'm waiting for your vid to down load (slow dial up), thought I'd stick my head in and say hello. The H9 P40 has been on my list of planes to get as I want a war bird with retracts.......retracts that are fairly rugged. The H9 corsair has a bad rep for flimsy retracts. Would you comment on the durability to the P40's please?
I'm new to electrics and struggle with understanding how much power comes from what motor battery setup. I see you use watts as a final power guage. This makes sense to me from my limited understanding. So why don't the manufacturers rate the motors by watts? Or at least max watts? or maybe a watts range?

[the Swamp Fox]

Hi,

The retracts are ok. I think that any model with retracts may require a little extra attention in the shop and on landings . My bud has this plane as well, the retracts are fine on both .

So why don't the manufacturers rate the motors by watts? Or at least max watts? or maybe a watts range?

some manufacturers do ,,, but amperage is a little more crucial to insure you don't smoke something.Just by switching to a different prop ( but same size ) sometimes I'll find that I'm drawing more amps and producing less wattage . pretty sure this has to do with the effeciency of the prop .


watts/lb is sort of a measure of expected performance ...100w/lb is good, 150 better ,,,etc ..etc...

take care :)

[Pilot44]

Henry,

Heya mate, how we doing lately....

Meantime, Friday I ordered a AXI 4130/16 for my Mig 3 HL had a ($25.00 off for over $150.00 sale, a nice thing). Plane should weigh in with retracts no more than 6.5lbs. Wondering what size battery will give me best results. Have any heads up for me?

Jim

[B717 Furloughee]

Swamp Fox,

Is that the same P-40 in that second video? Sounds different.

[the Swamp Fox]

hey jim !

Good to hear from ya. Hope ya do a thread on your conversion .
Battery choice is a bit of chore ...for me anyway ..price vs. performance/duration and of course they have to fit in the plane !

HL shows specs with that motor on 20-24 cells so 5s 6s should be fine .With such a light plane you might be able to go 4s but I'm not sure of the KV . + you may have to spin a pretty big prop so ground clearance might become an issue . I just went ahead and got 2 .60 size conversion combos(hacker) and had my 5s pack reconfigured to fit in a .40 Chipmunk...

My buddy has had success converting the HL 72" Cub and Decathalon.
HE got his cells from Dymond and paid WAY less than me :( $125 for a 5s 4000 config + an Axi 4120 series motor . he was getting about 7 -10 min safely. He used ATV to limit 40a @ 700 +/- watts 13x8 ...performance was great .

___________

HI B717 ,
I shot the second video of my buddy's plane ... it IS a different plane and motor ... Hacker C50 10 on 6s4p ..

take care~

[CUBANO8]

Jim,

I second that on making a build thread for the Mig 3. I guess that is a VQ kit???
Would love to see detailed pics of it.

Anyways, the info here is, priceless.

Sam

[the Swamp Fox]

Hey all :)

Installed a new Hacker B509xl
stepped up from 5s to 6s3p 6000 Prolite packs
jeti 77 opto esc
apc 16x10

1,000 watts + Sweet...

2 flights today ,,, after the 1st flight I realized there's nowhere really suitable to land .

nosed over on the 1st one and decided to wait until we found a better spot ...

welp,,, I decided to go to the same spot again like an idiot ...

Flight was just fine until it was time to bring 'er in ...

it was getting dark .. fast ,, straining to see ,losing the plane against the trees..

had about 60 feet of suitable runway about 15' wide

"devils ditch" on both sides ,,,

no guts ,no glory ,no choice

comin in !



http://www.back40flyers.com/flightvids/H9P40.WMV

[CUBANO8]

Yea, Bravo!!

Wow!! That planes got some real power now, you can almost feel it on those fly-bys.

[B717 Furloughee]

That landing strip is going to get you one of these days. Murphy is always lurking.

Nice video!

[JPHen]

LMAO! And to think I was going to ask you were some good flying fields were when I was in North Myrtle and Lake Wateree last week.... and I thought were I flew was bad....

[drksyd]

Nice landing, good thing you were able to keep track of it.
How many amps are you running with this setup?

[the Swamp Fox]

hey all,,

Drksyd
wattmeter says :

1,380 watts @ 67 amps

~take care

[JPHen]

Awesome! I love those numbers. That, to me, is the biggest hang up with conversions - the $$$ of lipos on these setups is huge.

[drksyd]

JPHen
That's numbers for a Hacker setup. They can run at higher amps and put out the power. I like the Axi's since it's more affordable and the amp draw is not as high so less cells in parallel. Have some larger Mega's to use in gb, will see how well that works soon.

Swamp
That explains that short take off. I like the growling sound on the passby, plenty of power behind it.

[JPHen]

Swamp, what is your AUW with the 6s pack? I had to get the Graupner AT-6, so I'm curious about power systems.


Joe

[the Swamp Fox]

hey Joe,

right around 8 1/2 lbs on a digital fish scale.

I had to get the Graupner AT-6

ooooh.... sweet :)

good luck all ~

[drksyd]

Plugged your numbers into MotoCalc and your gearing comes out to 4.6, at least that's what I get with your amp draw and watts.
Been back and forth with MotoCalc getting ready for Miss America. Started on it and will post soon.

[sarge]

SF,
Man am I glad you started down the conversion road before I did!

I'm going in stages. Picked up the motor today from my LHS. Actually, thats what started it all. The owner showed me an Eflight Power 60 that he had for 84.95. Thats a good bit cheaper than any other price I've found for one. 40 amps sustained, 60 max, 1200 watts. That should help me narrow the choice of planes down some. I hope to do it all on 6s2p TP 2100 PLs. I already have half the 2s packs I need to make the batts, so that will help with the price. Wife is getting me a Jeti 77 opto for xmas. No BEC, correct? That means I just use a normal flight pack? If you had to do it again, would you still choose the same plane?

[Air-Gar]

I managed to make some pretty good progress on my '47 last night. I got the motor all mounted up and the cowl on.

Ted

Ted, where did you get the 4-bladed prop?

[Air-Gar]

Another question: how strong is the landing gear on the P40?
I've heard that the retracts on the H9 P51 are pretty flimsy.

[soulys]

what adapter are you using for your dave brown spinner? does it fit with 5mm shaft?

Hey all ,

took it up last night .

very nice flyer . no bad habits and quite nimble for a big gal .

hacker B-50 10 xl
5s3p 6750
hacker master 70
ubec
Dave Brown 3 1/2" aluminum spinner
apc 16x10
hitec 8ch rx ?

I get about 950 watts @ 50a Static ...
maiden was 6 min and the pack took back about 1800 mah
Not a rocket, but ample speed , awesome sound ,and performs very smooth warbird manuevers .
pics /vid to come .

oops on the landing,,,need a better runway ,,,ahem - :(

http://www.back40flyers.com/flightvids/P-40%20swamp.WMV
take care all .

[the Swamp Fox]

hey air gar,
landing gear is good so far even off rough stuff . You should have no worries off a smooth surface.

Soulys , Pmed ya

SARGE ! Hey bud, long time.

Wife is getting me a Jeti 77 opto for xmas. No BEC, correct? That means I just use a normal flight pack? If you had to do it again, would you still choose the same plane?

cool wife ! No BEC on the OPTO series. ,I use a UBEC that you solder inline with your batt leads, or you can just use a RX batt if you want.

umm about the plane choice... I choose this one 'cause it was in the shop and H9 build really quick and easy. It flies VERY well and is easy to handle. Doesn't look too scale but that's ok . Generous Dihedral and a thick airfoil make it a floater . Cruise with 1300 watts is around 1/2 throttle. Overall I'm very pleased with this bird , but you know I'm an FW-190 guy ;) nice 40-60 arfs of that plane are almost non-existent. What plane are you considering ?

Take care and best of luck ,

Henry

[sarge]

I've got the motor and half the batts, if I go with 6s2p and make it out of either 6 2s or 4 3s packs, so the 1200 watts (motor limit) and 60 amps (self-imposed battery limit) will drive my choice. All I've done so far is look around at the available WWII birds. My all time favorites are the FW190, P51, Corsair, and P40. I've had no luck finding a 190, and it looks like a P51 would need to be a .40 sized to fly well with my motor/batt selection. Your P40 looks scale enough from 10-20 feet to suit my tastes, and the H9 F4U is floaty enough that the .60 size would be fine. My LHS also has a Jug, but I do have something close to a budget, and it is 275.00 for the ARF alone. My club has several Corsairs, and I like the idea of showing up and eliminating the old "what a cute little electric plane" look that still creaps up now and again. If I find the right Corsair, I'll go with it.

I'll probably try the UBEC to save the weight. Old habits die hard. I'll hit you up for advice about retracts when I get to that point. Thanks for the input, and it was good to hear from you.

Dale

[Air-Gar]

I'm getting ready to convert the H9 P-40E to electric power.
Here's what I'm looking at:

- AXI 4130/20
- Jeti 77 amp ESC
- Tanic 6s 3,650 LiPo
- MAS 3 bladed 16x10 prop (I know, but I just can't handle
warbirds with 2-bladed props).
AUW will be about 8 to 8.5 lb.

How well will it fly?
Any suggestions from anyone?

Air-Gar

[the Swamp Fox]

I would use a wattmeter when testing any power system, especially expensive conversion projects.

just guessing I think a 16x10 3 blade may draw too much for 6s 3650. Could be wrong

So wind up different props on the meter until you're safe . Haven't smoked anything until I started using one awhile back .

you need about 100 watts / lb .

My P-40 has flown with 800-1300 w setups.

performed great at lower power, but more is better !

Best of luck ,this is a nice flyer ~

[Pilot44]

So, now I'm thinking might be an easy conversion to electric for this Great Planes FW190 see'ins how its already built. Just change out the OS 61FX to my AXI 4130/16 and figure out how to stuff some batteries in there. Or this P51 is a candidate as well. I have a VQ Mig 3 settin around in the box as well that I had intended to do electric, might go back burner. Other two planes have Spring Airs Retracts already installed. This might be a quickee job.

Jim

[Air-Gar]

So, now I'm thinking might be an easy conversion to electric for this Great Planes FW190 see'ins how its already built. Just change out the OS 61FX to my AXI 4130/16 and figure out how to stuff some batteries in there. Or this P51 is a candidate as well. I have a VQ Mig 3 settin around in the box as well that I had intended to do electric, might go back burner. Other two planes have Spring Airs Retracts already installed. This might be a quickee job.

Jim

What is the weight (ready to fly) and wing area of the FW?

[Lynxman]

I'm getting ready to convert the H9 P-40E to electric power.
Here's what I'm looking at:

- AXI 4130/20
- Jeti 77 amp ESC
- Tanic 6s 3,650 LiPo
- MAS 3 bladed 16x10 prop (I know, but I just can't handle
warbirds with 2-bladed props).
AUW will be about 8 to 8.5 lb.

How well will it fly?
Any suggestions from anyone?

Air-Gar

I replied in your thread in the power systems forum. Out of curiosity, last night I tried running the 3-blade Master Airscrew 16x10 on one of my Axi 4130-20 with a 8S 4000 mAh battery. It pulled 46.5 A and 1216 W. I didn't measure RPM. With 6S you might end up pulling up to 35 A at full throttle if I have to guess.

For me, scale diameter is more important than scale number of blades.

[the Swamp Fox]

thanks for posting prop test results Lynxman :)

looks like you'll be ok airgar, I'd still run it up on wattmeter if you can .


JIM,
I hate you ,,,,you know I covet your FW190 ...
and here you post how you're going to convert it ?? :(

after it sits for 6 years ?

man that's just cruel ;)

seriously though ...

So, now I'm thinking might be an easy conversion to electric for this Great Planes FW190 see'ins how its already built. Just change out the OS 61FX to my AXI 4130/16 and figure out how to stuff some batteries in there.


there ya go bud ! Do it . Your F9F packs will be MORE than enough . Take ya couple hours max .
Even though the 4130 is great...
...I'd go Hacker , 1st off German motor, German plane :D
2nd Hacker can take all you can throw at it.

Then all you have left is to fill in that glow hole in the cowl ;)

Got your message , Landline me.

take care all

~Henry

[sarge]

Henry,
Did you know your video is the footage Esprit uses on its P40 page? Pretty cool!

[Tommy D]

I REALLY hate to get off topic, especially when your P-40 is such a great conversion. But consider this deveation all in the name of converting larger warbirds.

Jim, do you know what your FW-190 weigh's empty? I ask as I have a O.K. models FW-190 I'm thinking of converting to electric next season. It's about 3lbs now, with no motor, servos, ect.

Ok, back on Topic!

Tommy D

[Air-Gar]

I replied in your thread in the power systems forum. Out of curiosity, last night I tried running the 3-blade Master Airscrew 16x10 on one of my Axi 4130-20 with a 8S 4000 mAh battery. It pulled 46.5 A and 1216 W. I didn't measure RPM. With 6S you might end up pulling up to 35 A at full throttle if I have to guess.

For me, scale diameter is more important than scale number of blades.

Lynxman,
Thanks a lot, that's very helpful. I probably should go with 8s, rather than 6s. 1200 watts would be plenty of power. I'm still agonizing over the power system and haven't made any decisions yet.

Rob Smith, in his H9 P-51 conversion article in the recent Quiet Flyer, uses an E-flite 60BL outrunner on 6s3p, a 2-bladed APC 15 x 10 prop. It draws about 50 amps and generates about 1029 watts at 6810 rpm. Do you know anything about that motor? Horizon sells them. What AXI is it equivalent to?

I have a friend who is building the Skyshark RC Bf-109e. He's putting an AXI 5320 in it on 8s with a 20 inch 2-bladed APC. The 109 has a 65 inch wingspan and will weigh about 9 pounds (same as the P-51 and P-40). I'm wondering if I ought to be looking at the AXI 5000 series outrunners rather than the 4130.

Another issue is where to get a 3 1/2 inch, 3 bladed spinner. I spent two days on the internet trying to find one that looked like a P40-E spinner - no luck. I may have to go with 2-blades, but that would give me massive heartburn. Dave Brown will costom make spinners, but I hate to think of the cost. I need to check it out.

The reason I'm so fussy about this is that I have pulled the covering off my P-40E and am going to to a real scale job on it - authentic paint scheme, cockpit details, etc. I have a P40 documentation package for a beautiful full scale P-40E that I'm going to simulate. So I want it to be right.

Thanks a lot for testing the MAS 3-blade for me. I appreciate it.

Air-Gar

BTW - scale diameter on this P-40E would be about 18 to 19 inches.

[drksyd]

Air-Gar
I'd like to see your P-40 when it's done. The biggest gripe I have with the H9 kit is the covering, can't have camo with a shine.
If you want to use a scale prop then the 4130 is not the motor you want to use. On 8S it would spin a 14x10 prop, I'm quite sure the 5320 starts off at 18"s. Also, if you're going to use larger props, make sure you have a nice paved or well kept grass runway. The warbirds are easy to noseover on less than perfect surfaces and with the larger prop there isn't much leeway for nosing over before the prop strikes.

[Lynxman]

There are two different 4130 winds. A 16 turn and a 20 turn. The 20 turn does really well with a 17x8 on 8S.

[the Swamp Fox]

Hey Sarge ,

Did you know your video is the footage Esprit uses on its P40 page?

cool ! There I am . I didn't know that .


Air GAr ,
I agree with Darksyd covering too shiny , I'd would also love to see your covering job . I may just hit mine with dull cote

regarding power , getting 1,000w + is no problem with 6s, going to 8s and axi 5000 may get the weight up without that much gain in performance. + $$$ in batteries ,but it would work ,no doubt .

1st flights were on Hacker 9xl 5s 6750 around 900w on 16x10
I switched to 6s 6000 prolites , same weight 1,380w 16x10
Everything lands cool to the touch .

I have a Dave Brown spinner on there and it's quite nice , the little extra weight gets the CG perfect give him a call for custom jobs, It may be $$$ like ya say .

There are two different 4130 winds. A 16 turn and a 20 turn. The 20 turn does really well with a 17x8 on 8S.

thanks again Lynxman :)

nice variable pitch props here www.soloprops.com

don't think they do spinners though :(

take care all ~

[Air-Gar]

drksyd and Lynxman-
Here's how I plan on finishing my P-40E: cover with Nelson's litefab, spray with 1 or 2 coats of filler then wet sand with 300 or 400 grit, airbrush on the camo (I use Benjamin Moore latex house paint matched to the color chips), then overspray with Minwax Satin clear polyurethane to give it a dull sheen. I used that method with a GP Spitfire 40 and it worked well and wasn't too heavy. Here are pictures of the Spit (note the 3-bladed prop).

I'll have to make my prop length decision when I have the wheels on the plane. I know all about the nosing over problem and that is a concern for me, as I usually fly off a grass field. My Spit likes to nose over too, so I take it to a concrete runway to fly it. But I have a friend with the H9 "Miss America" and he flies off our grass field successfully by putting in a lot of up elevator on take off and landing. Bigger wheels than the spit and more mass on landing make it easier.

I'll keep you posted on how the P-40E develops. I pulled the covering off yesterday and it was a lot easier than I thought. Only took a couple of hours.

[Air-Gar]

Hey Swamp,
What retract servo did you use? Do you know what the torque is? Did it work okay for you?
Air-Gar

[the Swamp Fox]

hi air gar,

Hitec HS-75bb retract.

no problems at all .

let's see

Output torque 6.6kg.cm(92oz.in) AT 4.8v
8.2kg.cm(114oz.in) AT 6.v

that's off the box .

I used a 5v and a 6v bec no worries either way .

Take care ~

[Air-Gar]

Thanks Fox, I'll pick one up.
Air-Gar

[pigeonfarmboy]

Site down? I can't view vids or the site.

[pigeonfarmboy]

nm, they're back up. I wanna give this a shot.

[drksyd]

Air-Gar
That's a mighty fine Spit you got, I can imagine how the P-40 will turn out. Too much work for me though, 2 hours just to remove the covering, and that's the easy part.

The larger lipo packs really hurt the wallet but once you have them you can combine them for almost any power system.

[Air-Gar]

Air-Gar
That's a mighty fine Spit you got, I can imagine how the P-40 will turn out. Too much work for me though, 2 hours just to remove the covering, and that's the easy part.

The larger lipo packs really hurt the wallet but once you have them you can combine them for almost any power system.


Hi drksyd - you're right about the Lipos. But wow, do they fly!!

The P-40E will be a lot of work all right. I spent two days just putting scale detail on the tail feathers. But where I live we have 5 months of darkness - prefect for building airplanes.
Air-Gar

[soulys]

what is the empty weight you know with just the airframe?

[Air-Gar]

what is the empty weight you know with just the airframe?

I'm assuming you're talking about the H9 P-40E.
The empty weight is 75.8 oz (with the skin on). That includes the airframe, canopy, cowling, wheels, hardware, and miscellaneous wood pieces.

Air-Gar

[pigeonfarmboy]

If I may ask, what's the build total cost on this plane?

[Air-Gar]

If I may ask, what's the build total cost on this plane?

Probably close to $800

http://www.hobby-lobby.com/g2e-h9p40.htm

Air-Gar

[pigeonfarmboy]

Oh well that makes it easy. Is there a "better" kit than the H9? I've read a few complaints of the covering being glossy but never anything about the actual structural differences.

[drksyd]

Kit or arf? World Models has one but I think the covering still has a shine and the H9 looks better. CMP has a .46 and 1.20 size and they're painted so they look good. If not, you can get a Top Flite kit and make one and cover/finish it however you want.
The H9 kits are well built and fly great, I don't think you'll find anything better without paying a premium.

[bernoo]

The CMP 40 size P-40 has a killer paint job. Very realistic and a good candidate for further weathering. Looks great.

[wellington53]

Hello bernoo, I got the CMP Mustang 50. I was just wondering if the engine mount on your P-40 is the same as my P-51 in that they have prebuilt the engine mount so the engine slots right in there.
Glenn.

[Air-Gar]

Oh well that makes it easy. Is there a "better" kit than the H9? I've read a few complaints of the covering being glossy but never anything about the actual structural differences.

Farmboy:

You're right about the covering - it doesn'tlook real. I ripped the covering off my H9 P40-E and am going to recover it and airbrush it with real cammo. With the covering off, I can tell you that the structure of the plane is very solid and well designed, but also fairly light. I think it'll made a very good electric conversion.

The only other comparable P40-E kit out there is the Top Flight kit. It's very heavy for e-conversion, though. Pica used to market a 1/5th and a 1/6th scale P40-E kit but they are no longer available. These were also bricks. If you are looking for a size 60-P40 I think the H9 is a good choice.

You might check in the scale electric threads and see if any of those guys know of a good P40 kit.

[B717 Furloughee]

How does the CMP P-40 compare to the H9?

[drksyd]

CMP is only a .40 size or larger 1.20 size. CMP kits have fg fuses and built up wings, most are painted and are good kits for the price. I'd have to say the H9 is higher quality but the CMP's are good deals for tight budgets. I have their .90 size Spitfire and the finish looks great, fuse has panel lines and rivets. The larger kits have flaps but not sure if all .90+ kits do. Entire plane is airbrushed camo so it looks very good.
Check out this auction, these are the best deals on the CMP Hellcat around. http://cgi.ebay.com/NEW-RC-NITRO-GAS-AIRPLANE-CH6-ARF-R-C-F6F-HELLCAT-120_W0QQitemZ6014753674QQcategoryZ19164QQssPageNam eZWDVWQQrdZ1QQcmdZViewItem

[bernoo]

Hello bernoo, I got the CMP Mustang 50. I was just wondering if the engine mount on your P-40 is the same as my P-51 in that they have prebuilt the engine mount so the engine slots right in there.
Glenn.
Yes it i. I will post a pic of the conversion tonight

[soulys]

hey swamp,

can you post a pic or two of how you mount the two 3s3p tp 6000. i'm looking to do the same setup for my miss america.

thanks!


Hey all :)

Installed a new Hacker B509xl
stepped up from 5s to 6s3p 6000 Prolite packs
jeti 77 opto esc
apc 16x10

1,000 watts + Sweet...

2 flights today ,,, after the 1st flight I realized there's nowhere really suitable to land .

nosed over on the 1st one and decided to wait until we found a better spot ...

welp,,, I decided to go to the same spot again like an idiot ...

Flight was just fine until it was time to bring 'er in ...

it was getting dark .. fast ,, straining to see ,losing the plane against the trees..

had about 60 feet of suitable runway about 15' wide

"devils ditch" on both sides ,,,

no guts ,no glory ,no choice

comin in !



http://www.back40flyers.com/flightvids/H9P40.WMV

[the Swamp Fox]

can you post a pic or two of how you mount the two 3s3p tp 6000



sure bud,
sorry for the delay ... as you see I'm no neatnik , but it works and that's what counts.

I basically ground away as much wood as I dared to get a flat spot, layed some 2oz cloth and glassed a piece of ply in there with 2 straps attached (one's not visible in the pic.) The packs ride atop of each other held together with strappping tape . Velcro on the bottom then strapped . very secure .

* be careful that any motor mount bolts or cowl screws etc are NOWHERE near the packs or ground flush . In a crash you may puncture your packs . *

other ways to go about it, but this works for me and the CG is bang on with no dead weight .
Take care,
Henry

oh yeah the pic ...

[Coop]

I just saw the CMP models on Ebay. I liked the P-51 even if it isn't scale. What would be the electronics needed to convert it. This would be my first conversion so detail is important here. Thanks.

[soulys]

perfect!

sure bud,
sorry for the delay ... as you see I'm no neatnik , but it works and that's what counts.