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How heavy is your KMP P38 - 11/26/2007 11:48:30 PM   
vertol


 

Posts: 25
Joined: 6/23/2002
From: Bayshore, NY, USA
Status: offline 		Hi guys,
For those of you w/ a KMP P38, Wondering how much they weigh in at and w/what eq?

I'm looking to go electric so I need to know what they end up at....

Thanks

vertol
       Post #: 1

RE: How heavy is your KMP P38 - 11/27/2007 12:08:00 AM   
spitmad


 

Posts: 480
Joined: 1/24/2005
From: MentoneVictoria, AUSTRALIA
Status: offline 		Mine is powered by 2 x OS 91 f/s with 2 x 5 cell rx and 3 cell onboard glow in the nose to balance, total flying weight is around 19 lbs.

cheers

Alan

(in reply to vertol)
       Post #: 2

RE: How heavy is your KMP P38 - 11/27/2007 1:52:07 AM   
vertol


 

Posts: 25
Joined: 6/23/2002
From: Bayshore, NY, USA
Status: offline 		wow

(in reply to spitmad)
       Post #: 3

RE: How heavy is your KMP P38 - 11/27/2007 3:42:23 AM   
evan-RCU



Posts: 2639
Joined: 2/4/2002
From: Charlotte, NC, USA
Status: offline 		MIne is almost that heavy with twin GMS .75's and extra servos, 2 for elevato, 2 for rudder, 2 for flaps, 2 for aileron, 2 for throttle, 1 retact.

But it flies like it is very light. After all the quality problems she does fly well.

_____________________________

Revver #125, Pico Owners Club #3
R/C Anonymous. My name is Evan and I have not flown for 14 hours.

(in reply to vertol)
       Post #: 4

RE: How heavy is your KMP P38 - 11/27/2007 11:42:58 AM   
vertol


 

Posts: 25
Joined: 6/23/2002
From: Bayshore, NY, USA
Status: offline 		Anyone gone electric?

I was planning on going 8s w/ a C5065 motor (like a e-flight 60) but now am thinking of going 4s w/ motors more like a 46 in power....

have you guys seen the artical of the P61 thats electric w/ 4s and 40 size motors?

thanks for the input guys,keep it comming....

anyone know what the ship weighs in at w/out engines/motors?

thanks again

Vertol

(in reply to evan-RCU)
       Post #: 5

RE: How heavy is your KMP P38 - 11/27/2007 1:14:46 PM   
evan-RCU



Posts: 2639
Joined: 2/4/2002
From: Charlotte, NC, USA
Status: offline 		There was an electric, do a search you should find it...

_____________________________

Revver #125, Pico Owners Club #3
R/C Anonymous. My name is Evan and I have not flown for 14 hours.

(in reply to vertol)
       Post #: 6

RE: How heavy is your KMP P38 - 11/28/2007 5:07:31 PM   
Glacier Girl



Posts: 6887
Joined: 7/9/2004
From: SomewhereIn, PA, USA
Status: offline 		Mookie1 did a conversion on the VQ P38, it's similar. I'm doing one now. Also Mike Pope, and I did the CMP versions, 90". My CMP weighed approx 21 pounds RTF.

_____________________________

"The Missing Man Formation"
Looking heavenward you cannot help but shed a tear...mornful...lonesome...a hole that screams out almost as loudly as the roar of the engines that pass over head.

(in reply to evan-RCU)
       Post #: 7

RE: How heavy is your KMP P38 - 12/3/2007 10:36:40 AM   
jditton


 

Posts: 16
Joined: 1/28/2005
From: Rothwell, AUSTRALIA
Status: offline 		2 x OS46, a little ove 7kg (15 1/2 lb).
It's not what you put in, it's what is left out.................
Electric is very tempting, cost for good performance is still up there though!
Best luch
JD

(in reply to Glacier Girl)
       Post #: 8

RE: How heavy is your KMP P38 - 12/3/2007 6:25:07 PM   
vertol


 

Posts: 25
Joined: 6/23/2002
From: Bayshore, NY, USA
Status: offline 		Dj,
how well does it perform w/ the 46s?

how well did it balance out?

what did you "leave out" ?

what landing gear are you using?

thanks

(in reply to jditton)
       Post #: 9

RE: How heavy is your KMP P38 - 12/4/2007 1:41:57 PM   
cottp51


 

Posts: 58
Joined: 10/31/2007
From: Alta Vista, KS, USA
Status: offline
quote:

ORIGINAL: spitmad

Mine is powered by 2 x OS 91 f/s with 2 x 5 cell rx and 3 cell onboard glow in the nose to balance, total flying weight is around 19 lbs.

cheers

Alan



how are you hooking up 2 x 5-cell batterys to you Rx? I just ordered one of these planes and was wondering what to do about battery life with all those servo's

(in reply to spitmad)
       Post #: 10

RE: How heavy is your KMP P38 - 12/5/2007 11:45:15 AM   
jditton


 

Posts: 16
Joined: 1/28/2005
From: Rothwell, AUSTRALIA
Status: offline 		What did I leave out? Well, anything not essential to the flying, ie on board glow, gear doors, pilot(!), bigger engines and so on. Using 46's did save weight, but some nose ballast needs to be used.

Main landing gear is still stock, and yes it's pretty average. Also puts the wheels well aft of the scale location. I fly off grass and find it is hard to rotate on takeoff. I'm looking at the options re shifting and making my own retracts for the mains, have already made a nose gear assy.

Flying is good, enough power but it won't pull 1000ft loops....................and it's not a fun fly. Needs a fair amount of right rudder with power, one of the penalties for not running contra-rotating props like the real ones I guess. That's a definate advantage with electric.

Cheers
JD

(in reply to vertol)
       Post #: 11

RE: How heavy is your KMP P38 - 12/6/2007 5:33:07 PM   
vertol


 

Posts: 25
Joined: 6/23/2002
From: Bayshore, NY, USA
Status: offline 		Hi guys,
Thanks for all the input....ok,now on to a related question...

what landing gear are you all using, and .....do you know anyone who may have ...sad to say....

crashed a 38 w/ good gear that wants to sell them....

thanks as always....

vertol

(in reply to jditton)
       Post #: 12

RE: How heavy is your KMP P38 - 1/18/2008 3:51:45 PM   
hidale


 

Posts: 1
Joined: 6/3/2002
From: OR
Status: offline 		Alan. Have you flown the 19 lb. P-38? I have been afraid to fly mine at 17.5 lbs with two 4 cycle 70s. That's 47 oz/sq ft.
Higher wing loading than anything i have flown so far. I have added the engine syncronizer also. That may save the day.
Dale
hidale@msn.com

(in reply to spitmad)
       Post #: 13

RE: How heavy is your KMP P38 - 1/21/2008 5:32:35 AM   
spitmad


 

Posts: 480
Joined: 1/24/2005
From: MentoneVictoria, AUSTRALIA
Status: offline
quote:

ORIGINAL: hidale

Alan. Have you flown the 19 lb. P-38? I have been afraid to fly mine at 17.5 lbs with two 4 cycle 70s. That's 47 oz/sq ft.
Higher wing loading than anything i have flown so far. I have added the engine syncronizer also. That may save the day.
Dale
hidale@msn.com



G'day Dale
I actually flew my P38 again yesterday for the first time in over a year !.........it's been hanging in the garage gathering dust since the last flight in Nov '06 .
Once airborne it flies well although it must be yanked of the strip (I think my nose strutt is too short as it used to fly itself off with the original longer strutt......but I replaced it with a 105 deg. robart strutt which I cut a little too short) ..........anyway performance is good with the 2 x 91s..........I'm glad I went with the 91 though as I think it would struggle with 70s (although the 70s are quite a bit lighter).

The 38 is not a nimble aircraft and you will find the roll response almost like a delayed reaction due to the wide set engines, it is fun to fly and lands easily, with full flaps deployed you line her up and just throttle back and flair just before touch down. I have not had any flame outs (thank Christ) but I do have an onboard glow for added security. Loops are nice and big but you must keep the energy up as it does wash off airspeed very quickly, I actually tried a too big a loop yesterday and it stalled inverted and snapped into a lazy spin......luck I was "three crashes high" when I tried that
As you only have 70s for motivation, I would suggest you keep the flights very scale and only attempt high energy manoeuvres (gain lots of airspeed first.)
My 38 has had around 30 flights to date and the only issuee is the nose wheel occassionally fails to lock which results in a nose grind......but I fly off grass so no big deal.
Best of luck ..........you will love the sound of the twin 70s purring away...........and low strafing rauns are great !

Alan

(in reply to hidale)
       Post #: 14

RE: How heavy is your KMP P38 - 1/21/2008 3:25:44 PM   
vertol


 

Posts: 25
Joined: 6/23/2002
From: Bayshore, NY, USA
Status: offline 		Hi Guys,
Well,its been a while and its time for an upadate and a special thanks to all who have offered any tips or thoughts....

So here we go....

Background first. I have been flying R/C since I was 14yrs old,mostly helicopters,then airplanes and now both and electric planes and helis.....can't believe I just turned 40

This is my THIRD KMP p38 ! the first one was my first expierience w/ a 4 stroke engine(s) the local gurus all sugested saito, so I got 2 saito 72's.....I could not gt them to run steady inverted no matter what I did,on board glow,local
expert help.....I ultimatly flew it when it was running at its best, had some good flights, ultimatly lost a critical engine and spun it it (I actually had several flame outs w/ successfull dead stick landings)
the plane also suffered from classic kmp retract problems....

Ok,on to #2.....ok so in talking w/ several people we figure saito may not be the way to go.....so we go w/ YS 63's.....MUCH BETTER w/ there pump system they ran 10X better than the saito's ,had several good flights,a few more flame outs and fin