RE: CMP BF109F BUILDING THREAD
 

The wing structure will allow you to use up to about a 4" diameter wheel without cutting ribs or stuff like that, but you will need to trim the wheel well opening a little and you wont be able to use the plastic wheel well covers(I didnt either). I put in williams brothers Golden Age 3 3/4" size
http://www.williamsbrothersmodelproducts.com/rc.html
Close to scale looking without being super expensive like Glennis.

Although slightly too wide of a stance relative to the real plane, very few ppl would notice the difference that arent me-109 fans.

Paladin...holy moly thats heavy. Mine being electric only weighs 17.5 pounds with the batteries in it. Mine flew decent and landed well, but it was not lite in the air. Tracked very well, but probably because of the weight. I hope you have a good long runway to land it on if it weighs 20 pounds fueled up

RE: CMP BF109F BUILDING THREAD
 

Alright, thanks for the info.

Also, just curious. Is the gear on your 109 in those pics the standard gear made for the CMPro 109 or is it custom?

RE: CMP BF109F BUILDING THREAD
 

The gear in my pics are the oleo strut pneumatics made by Sierra Giant scale for this CMP me-109. I sent him one half of the wing way back when in order for Darrel to get the right shape/length etc. to fit the plane without modification. The only thing really you have to do is sand down the retract rails(the inside edges) slighty just so the gear will drop in. Other then that, nothing else needed to be done.

RE: CMP BF109F BUILDING THREAD
 

Alright. I'm probably just going to stick with the vanilla gear and add larger wheels to make it easier to land on grass.

RE: CMP BF109F BUILDING THREAD
 

Well I got 12#1.5oz for the finished fuse and 4#3oz for the wing which is missing 6 servos (9oz), retracts (4oz), struts (4oz), wheels (8oz), 9 oz miscellaneous (includes wing joining tub). I have not done anything to add wt beyond 6v pack (+2oz), maple engine mount plus foam (+4oz) ?

I’m thinking I did not have the fuse balanced in the center of the scale but am not going to go through that exercise in futility again till I can put it under the wheels to weight it.

Joe

RE: CMP BF109F BUILDING THREAD
 

I have 3x 6v rx packs in the plane, a 12" dragonmodels luftwaffe pilot, and 2x 5s 5000mah batteries that each weigh 1.5 pounds plus the retracts from Sierra Giant and a home buillt secondary servo tray. You must have one heavy engine

RE: CMP BF109F BUILDING THREAD
 

This is my Messerschmitt BF 109, I repainted it in the colors of JG 54 greenhearts

The main mods I did to this model where:
-working slats
-moved the wings down for a more scale appearance
-working lights on wings and rudder
-removed the ventilations (or whatever their called) from the fuse and moved the exhausts down
-new working canopy


Im planning on putting glennis wheels on this, as well as a new cockpit (not sure which one though)

I also have a fliteskin spinner painted in black-white spiral (just couldnt resist having a 109 with a spiral spinner:D)</p>

I hope you like it

sorry for my bad english[:'(]</p>

RE: CMP BF109F BUILDING THREAD
 

khurlimann,

Very well done. JG54 has my favorite paint schemes of nearly all the German units of the war. Both the Bf 109's and Fw 190's are stellar.

Fantasic work.

RE: CMP BF109F BUILDING THREAD
 

khurlimann, Nice job. It will look really sweet when you get some larger wheels on there. I noticed your paint looks somewhat glossy. I use minwax polyurethane (satin finish) and it gives the plane a more realistic dull topcoat. It is safe over any paint or graphics I have found and it is very fuel proof.

RE: CMP BF109F BUILDING THREAD
 

Todd, there is quite a bit of documented proof that the Luftwaffe sometimes painted in glossy paints...

RE: CMP BF109F BUILDING THREAD
 

kurlimann

Your 109 looks great. Nice job on the bash. LE slats, thought i would have mine done by now. But............... I'm almost done with the house expansion. A few more weeks.

Steve

RE: CMP BF109F BUILDING THREAD
 

khurlimann,
Great job , can you shed some light , looks like your useing Century jet gear , do they make these for this plane ?

Kahloq , is the gear from sierra on the small side or is that my imagination ?

RE: CMP BF109F BUILDING THREAD
 

Thank you for all the comments, yes its the centuryjet landing gear for the KMP bf 109 E,

RE: CMP BF109F BUILDING THREAD
 

The Sierra gear is a bit short for scale since it was made to drop right into the original location. It looks close enough for me and allows the plane to handle well on the ground. If the gear were any longer the wheels would have to be even farther out into the wing, not good since there is barely enough room as it is for a decent sized wheel. Adding gear doors helps make the gear look more substantial.

RE: CMP BF109F BUILDING THREAD
 

Hot rod is correct that the drop in Sierra's are a little short scale wise since they are made to fit the CMP made wheel well and strut channel.

RE: CMP BF109F BUILDING THREAD
 

Ready for the maiden
Quick question, I balanced the plane perfectly using the instructions.

Are the instructions Center of gravity and balance correct and accurate?

RE: CMP BF109F BUILDING THREAD
 

I balanced mine ahead of the manual CG some and it flew quite stable and landed well. I tried flying it with a further back CG and it was very, very nerve racking as it lept off the runway well before I was ready and almost went smush.

RE: CMP BF109F BUILDING THREAD
 

How far ahead?

RE: CMP BF109F BUILDING THREAD
 

I believe the CG was placed at 108mm

RE: CMP BF109F BUILDING THREAD
 

Is this a good project for a first time large eletric warbird ?
let me be clear , not a first warbird , but first eletric large warbird .
I dont want a weight heavy hog , but eflight is looking like a clean option

RE: CMP BF109F BUILDING THREAD
 

Thats questionable for this plane. Although its a great conversion, it wont come out near as light as a glow setup. That being said, it was my first SINGLE engine large electric plane.
Even at slightly over 17 pounds, it flies really well even at 5000ft altitude.
However, please keep in my mind, my 17 pounds includes a full figure 12" Dragon models luftwaffe pilot, 2x 2600mah 6v rx packs, 1x 1500mah 6v pack(for use on the flaps with a matchbox) and two servos on the elevator, not one like the manual wants.
Batteries are 2x 5s 5000mah rhino(turnigy).

If you use a bust pilot and dont cut out the cockpit area, you could probably keep the plane around 15.5-16 pounds for electric.

RE: CMP BF109F BUILDING THREAD
 

the dragon pilots are about 8oz , I weight mine for my Fw190 , cut the body -replaced the torso with blue foam and got the guy down to 3oz fully dressed .

I guess i would be concerned with the weight , cost to benfit ratio of all that e-gear vs a simple set up with glow .
I dont know what the glow planes are coming in at but I dont think the CMP frames are built to take long term stress at 17 lbs . Were there other power options on eflight with lighter finished weights ?

Dont get me wrong , I am sure your set up is working and working well , I am just dont think its for a newbe in eflight like me .

RE: CMP BF109F BUILDING THREAD
 

Well..like i said, you could get the weight down to around the 15 pound area. I think a few ppl have done so, but I dont recall everyone thats done electric actually weighing the plane. AS far as the actual plane being capable of holding up to 17 pounds over the long term.....I dont think its a problem. If you use decent landing gear like Sierra Giant that fit the stock areas, or use the KMP/YT gear thats for the KMP me-109 with some wing mods, the plane will hold up fine.

It was my first large electric(single engine) so at the time, I was a newb at it too. Dont let it bother you. This plane flies quite well even heavier then your normal H9 or topflite type plane.

For power options, sure you could use a smaller cell count...say 2x 4s 5000's for an 8s setup with the proper motor and kv. My motor is spinning an 18x12 prop, but you dont need that to fly the plane. A 16x10 prop would be fine or a 17x8 if you used an e-flite power 110 on 8s. The 110 is the same watt ouput as the normal non sk version of the turnigy 6364-230, just at a lower cell count of 8-9s.
You could also use an e-flite power 90 with a 16x8, 16x10, or 18x8. Not sure if the speed would be very good on 6s, but the motor is rated up to 8s...so using 8s 5000 would be usable for this as well.

Now...there are other options as well. One of the guys in the CMP 75" size Corsair thread is using that turnigy 6364-230 kv motor on 6s with a 20x15 prop. The ground clearance isnt there for a 20" prop on this CMP Me-109, but, you could cut it down to an 18 while keeping the 15 pitch for use with the lower cell count. This would save you even more weight going with a 6s 5000 IF you could get it to balance. My batteries sit basically over the wing, so really close to the CG. As such, I think you COULD get it to balance with a 6s battery pack.
Static full throttle would be 78mph with a 6s setup using a 15 pitch with a motor kv of 230(turnigy 6364).
Static full throttle would be 78mph on an 8s setup using an 8 pitch with a motor kv of 325(eflite power 90)
Static full throttle would be 98mph on an 8s setup with a 10 pitch using a motor kv of 325
Now...youd have to make sure the amp draw was within tolerance for the e-flite motor, but you get the idea. Yes its doable with less weight setup.

This motor here would also work. On 8s...youd probably want to use a 15x10 or 16x10. On 6s, youd probably want to use a 15.75x13 3 blade APC
http://www.hobbycity.com/hobbycity/s...idProduct=2097

RE: CMP BF109F BUILDING THREAD
 

wow, excellant info , you certainly do not sound like a beginner to e-flight .
My next question was just as you responed and that was hobbyking and if you used theer products and great value batterys ect
I want to cost out a package on this plane and see what I can do

RE: CMP BF109F BUILDING THREAD
 

One or two examples for you:
HXT 6364-280kv motor(HXT's are actually turnigy labeled now)
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=2097&Product_Name=HXT_63-64-A_280Kv_65A_Brushless_Outrunner_(52-30)
$50

2x 4s 5000 turnigy 25c batteries @ $55.72 ea = 111.44
http://www.hobbycity.com/hobbycity/s..._25C_Lipo_Pack
OR
2x 4s 5000 turnigy 30c @ 73.37 ea = 146.74
http://www.hobbycity.com/hobbycity/s...0mAh_4S1P_30C_

ESC..DO NOT use the hobbyking SS 90-100 amp esc over 7s. Its listed as 4-8s, but will blow on you on 8s. Its the same esc as the suppo 100 amp and the manual for that says 3-7s. Also, dont use an esc with a BEC built in. There are too many servos in this plane even for a separate UBEC. I highly recommend using an rx pack of 6v 2300+ variety to power your radio and servos. So...with that in mind use this one:
100 amp sentilion 5-12s HV
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4691&Product_Name=TURNIG Y_Sentilon100A_HV_5-12S_BESC_(Ver4)
$99
You need to set the timing to high mode for most large motors. I have 4 of these esc's and all have worked well...even in low and mid timing. But, I did pick up an additonal 150 watts when in high timing and since hobbycity says run in high timing for large motors, Id do that.

Use a separate deans type arming switch with key(scroll to bottom of this page...Id use this one since it has a mounting bracket):
http://www.maxxprod.com/mpi/mpi-21.html
Hobbycity does offer an arming switch, but no way to hard mount it. I'll link it for you anyhow though:
http://www.hobbyking.com/hobbyking/s...idProduct=6581