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RE: VQ Me 109 E Build Thread - 2/16/2008 4:23:45 PM   
KentuckyColonel



Posts: 480
Joined: 4/20/2007
From: Mission Viejo, CA, USA
Status: offline
quote:

ORIGINAL: Luxuswaffe

Nice video and flying field you have. I see you have chosen the fixed gear but the toe in is not right to make her land straight. Flight looks stable with little or no tendency to stall on slow approach. Thunder Tiger Pro .46, 10X7 2 bladed prop. Your cowl looks like mine after butchering the same. How long does the tank last with your engine?

I just finished mine. I powered mine with an OS 50 SX with an 11x9 prop upfront. I'll post a video upon maiden.

The gear is actually pretty straight...now. I had just screwed it in thinking I would swap it for retracts. That hard bounce on the landing actually popped the inside screws on both sides loose. They have since gotten the major epoxy treatment, and aren't going anywhere anymore!

I'm not really sure how long a tank of fuel will last. I get tired before the plane does. I am usually up 10-15 minutes and only burn about 1/2 - 3/4 of the fuel in the stock tank. I tend to fly full throttle (as you might have noticed) too.

I'm pretty sure you will really like this plane. I certainly do. My poor Mustang gets set up every morning, then just sits on the tarmac as the VQ Bf 109 goes up over and over. Good part about that is I only have one plane to clean up!

I look forward to seeing your maiden video.

< Message edited by KentuckyColonel -- 2/16/2008 4:25:53 PM >

(in reply to Luxuswaffe)
       Post #: 26

RE: VQ Me 109 E Build Thread - 2/20/2008 10:56:36 PM   
Luxuswaffe



Posts: 294
Joined: 4/11/2006
From: Naples, FL, USA
Status: offline 		One more thing ... balancing!

Book says CG between 88 and 90 mm from LE. Doweled hook at 90 mm from leading edge. Glued in with epoxy. Hooked it up in the garage. CG slightly in front of 90 mm. No additional nose weight required. Horizontally a slight tendency to the muffler side. Nothing dramatic. In other words: She is ready to fly.

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_____________________________

"They're called missiles." Revver Bro #181

(in reply to KentuckyColonel)
       Post #: 27

RE: VQ Me 109 E Build Thread - 3/2/2008 11:14:00 PM   
Luxuswaffe



Posts: 294
Joined: 4/11/2006
From: Naples, FL, USA
Status: offline 		Maiden flight report: The OS 50 SX has an easy game to pull the Emil in the sky. Tail lifts after 10 ft. After giving her 2 seconds more to build up speed, the whole plane lifts right up in the air. The 109 reacts promptly to the sticks. First flight with 35% differential on the ailerons which will unable the plane to quickly roll. On second flight I removed the differential on the ailerons and dialed 25% rudder in to support the turns. Now she manoveurs!

As I predicted the greatest disadvantage are the retracts. Although mine would retract on standing, the airflow prevent mine from retracting. I am running on a 6V receiver battery. Also, the mechanical retracts became wobbly but will withstand the landing forces. I am working on a air retracts solution.

Landing is easy. She flows right in on idle. Just like a low wing trainer.

No video this time. Can't control the sticks and the fumbly video at once. Will post a vid later.

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_____________________________

"They're called missiles." Revver Bro #181

(in reply to Luxuswaffe)
       Post #: 28

RE: VQ Me 109 E Build Thread - 3/3/2008 12:10:24 AM   
KentuckyColonel



Posts: 480
Joined: 4/20/2007
From: Mission Viejo, CA, USA
Status: offline 		Happy to read about your successful maiden. I fly mine all the time, and since my first flight mishap, have had no problems at all.

(in reply to Luxuswaffe)
       Post #: 29

RE: VQ Me 109 E Build Thread - 3/4/2008 3:43:54 AM   
nemesis4u



Posts: 2165
Joined: 4/4/2002
From: Bryan, TX, USA
Status: online 		CONGRATS to you both!!!!!

I look forward to your video!!

KC.,, ANY new videos of yours???

BTW guys the KI-61i TONY's arrive and ship on MARCH 5th!!!
http://www.vqwarbirds.com/products/aircraft/Ki-61iTONY.html


CHEERS!

-TOMAS
VQ WARBIRDS
www.vqwarbirds.com

_____________________________

R/C WARBIRDS / RC TANKS ENTHUSIAST
VQ WARBIRDS, KMP, & RCV

(in reply to KentuckyColonel)
       Post #: 30

RE: VQ Me 109 E Build Thread - 3/4/2008 5:38:39 AM   
kahloq



Posts: 1795
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
quote:

ORIGINAL: Luxuswaffe

As I predicted the greatest disadvantage are the retracts. Although mine would retract on standing, the airflow prevent mine from retracting. I am running on a 6V receiver battery. Also, the mechanical retracts became wobbly but will withstand the landing forces. I am working on a air retracts solution.



What retract servo were you using? If you put in a Jr 791, the wind will not be a problem at all. Its got 260oz of torque on 4.8v. However, since your running a 6v rx battery, you'd either need to run a voltage regulator inbetween the servo and the rx, or run a separate 4.8v battery for the jr791 as they will not function on 6v.
Also, if using a futaba tx/rx, you would need the voltage regulator as there is a cross-link problem between the futaba rx and the jr 791 even when using a 4.8v battery. If the voltage reads above 5.4v the 791 servo will not operate. This issue is not present when using a JR or Spektrum compatible radio/rx

(in reply to Luxuswaffe)
       Post #: 31

RE: VQ Me 109 E Build Thread - 3/4/2008 2:46:37 PM   
skrez


 

Posts: 354
Joined: 6/17/2004
From: Mokena, IL, USA
Status: offline 		Kahlog,
I`m using Futaba gear and the Jr 791 with my H9 Spit and have never had a problem with cross-link? The servo and retracts have worked great so far.
Frank

(in reply to KentuckyColonel)
       Post #: 32

RE: VQ Me 109 E Build Thread - 3/4/2008 6:32:20 PM   
kahloq



Posts: 1795
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline 		what battery were you using? Friend of mine has futaba 9c and was using jr791's on a dedicated 4.8v rx battery. On full charge, the battery would read slightly over 5.6v and the servos refused to function. Once he let the voltage drop below 5.4v, the servos worked fine. He ended up putting in a voltage regulator to keep the voltage reaching the 791's to 5.4 or below.
He emailed Futaba and they confirmed this issue. However, its always possible some rx's react slightly different...or if you arent running a separate retract only battery, then the rx itself is possibly regulating the current......but, in this case...you run the risk of draining the rx battery that controls the plane itself if one of both retract servos gets hung up.

(in reply to skrez)
       Post #: 33

RE: VQ Me 109 E Build Thread - 3/4/2008 10:15:01 PM   
skrez


 

Posts: 354
Joined: 6/17/2004
From: Mokena, IL, USA
Status: offline 		Kahlog,
I`m using a single 4.8v 1500ma pack for all the servos.
Frank

(in reply to KentuckyColonel)
       Post #: 34

RE: VQ Me 109 E Build Thread - 3/4/2008 11:14:14 PM   
Luxuswaffe



Posts: 294
Joined: 4/11/2006
From: Naples, FL, USA
Status: offline 		I am using the Hobbico 53 retract. I knew about the 6V-issue of the JR retract servo. It's not a lack of power but the precision of how the retracts are being made and the installation with the servo pushing as such. I am looking into the Robart 511 series with struts. Will need to dig into the wing. Another surgery.

_____________________________

"They're called missiles." Revver Bro #181

(in reply to skrez)
       Post #: 35

RE: VQ Me 109 E Build Thread - 3/5/2008 12:48:53 AM   
KentuckyColonel



Posts: 480
Joined: 4/20/2007
From: Mission Viejo, CA, USA
Status: offline 		Fixed gear has worked just fine......

(in reply to Luxuswaffe)
       Post #: 36

RE: VQ Me 109 E Build Thread - 3/5/2008 4:11:47 AM   
kahloq



Posts: 1795
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
quote:

ORIGINAL: skrez

Kahlog,
I`m using a single 4.8v 1500ma pack for all the servos.
Frank


Separate rx battery or one battery connected to the rx? Also, its probable your battery doesnt read higher then 5.4v, at least from the servo's prespective, or your particular 791 has a slightly higher tolerance. All I know is that there is an issue with futaba rx's and the 791's with voltage regulation. May not happen in every single case.

(in reply to skrez)
       Post #: 37

RE: VQ Me 109 E Build Thread - 3/22/2008 2:31:33 PM   
Luxuswaffe



Posts: 294
Joined: 4/11/2006
From: Naples, FL, USA
Status: offline 		Conversion to air retracts using Robart 606 HD at 85 degree. The 606 is almost a drop-in solution. 3/16 wire. Little Dremel work on the hardwood rails. Fill the former wholes with tooth picks and epoxy. Also use some Dremel work on the wheel wells to accommodate the air cylinder. Heat up the retract wire with a propane flame in order to bend them at the same angle. In an first attempt I tried to install the air tank on top of the wing. More useful is the solution to put the air tank inside the fuselage along with the valve as shown in the photo. 2 additional air-restrictors prevent the gear from popping up or down too fast and with too much kinetic force.

This solution is extremely well and I can highly recommend the use of the 606.

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