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Old May 17, 2011, 07:44 AM
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Melbourne, Australia
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Build Log
Building Derek Micko's 80" Bf 109 G-6

I've been looking forward to building D-Rock's 109 after watching it evolve over the past few months.

At the moment I'm assembling all the parts required for the build.
I'm going with the recomended 60 size outrunner on 6S and will be fitting
E-flite 60-120 size retracts. After doing some measurements I've choosen the 85 degree as this will give the 109 a wider stance.

BIW.
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Old May 18, 2011, 06:59 PM
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Hi BIW, you got started quick! Looking forward to your progress, subscribed

D-Rock
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Old May 18, 2011, 08:58 PM
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Thanks for the encouragement Derek.
At this stage I'm still sourcing parts for the build and have only done some dry assembly to check the U/C angles.

I can't really start the build till I have my new building table set up, I'll have to hassle my FIL about that!!

I'm going to my LHS today to pick up servos, depron foam, some spruce(for some reason Basswood is really hard to find in Australia?) and pushrods etc.
There is a shop in QLD that supplies basswood for model railroad construction that I can use as a backup if I don't like the spruce.

Also ordered is a heap of balsa from Balsa Central, they supplied the wood for my J-1 build so I know its good.

I've got some button head bolts for the spinner, they are about 2mm x 13mm with a very fine thread.
I'll post a pic of them tonight to get Dericks opinion if their suitable.

BIW.
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Old May 20, 2011, 08:09 PM
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The screws I used were #2 x 1/2" sheet metal screws, also with fine thread. It sounds like yours are very similar.

D-Rock
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Old May 25, 2011, 09:47 AM
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Bits and pieces...

I've been away in Sydney with the family for a few days but are now back in town.

I've nearly bought everything I need for the build, just waiting for my LHS to order in some 85 degree retracts for me, then I'm just about done.

I pick up a new E-Flite 60 Power motor on ebay for almost half what my LHS was asking which I'm very happy about.

In the end I bought HS 225MG's servo's for the aileron and flaps and HS485HB's for the rudder and elevator.

I've given up trying to find 1/8" dowel locally for the spinner alignment pins and have order a bag of 1/8 x 12" dowels from ebay in the USA! The thinest I could find at my local art supply shop was 1/6".

For covering I've got 10m of silver and 5m of white covering film from HK, my guess is that 10m should be enough to cover the model.

It won't be too much longer before I move into build phase...just got to get my work bench sorted...

BIW.
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Old May 25, 2011, 12:00 PM
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For 1/8" dowels I use the bamboo skewers for cooking. You can sort through the bag to find straight and round ones.

charlie
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Old May 26, 2011, 08:23 AM
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Quote:
Originally Posted by portablevcb View Post
For 1/8" dowels I use the bamboo skewers for cooking. You can sort through the bag to find straight and round ones.
charlie
Thanks for the tip Charlie, I did try some bamboo skewers that I found in the kitchen draw but they were a bit too small.
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Old May 26, 2011, 06:42 PM
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Good looking bunch of goodies . Those screw are exactly the same I used on the spinner. As for the dowel, if you have a source for carbon fiber rod, that would work too. Can't wait to see more.

D-Rock
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Old May 29, 2011, 03:38 AM
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Retracts

I picked up my E-Flite 85 degree 60-120 size retracts yesterday.

The look nice and strong(all metal) and should be up to the task.
The axel's supplied with the retracts are way to short so I'll have to find some others that fit 5 mm wire. So far the best I've found are made by Great Planes for 3/16 wire (4.76mm) and are 2" long. If I get these I'll have to either file the legs down to fit or drill out the holes.

I put my Servo Sence current meter on the retract and it is drawing about 200mA with the wheel attached. These size wheels are pushing the limits of what the retract motors can handle I think so hopefully they will last!?

BIW.

PS. Got a call from my FIL yesterday asking me about the cutouts required to make my door into a work bench so I should have it soon, then the fun can begin...
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Old May 29, 2011, 06:37 AM
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Quote:
Originally Posted by BuildItWright View Post
I picked up my E-Flite 85 degree 60-120 size retracts yesterday.

The look nice and strong(all metal) and should be up to the task.
The axel's supplied with the retracts are way to short so I'll have to find some others that fit 5 mm wire. So far the best I've found are made by Great Planes for 3/16 wire (4.76mm) and are 2" long. If I get these I'll have to either file the legs down to fit or drill out the holes.

I put my Servo Sence current meter on the retract and it is drawing about 200mA with the wheel attached. These size wheels are pushing the limits of what the retract motors can handle I think so hopefully they will last!?

BIW.

PS. Got a call from my FIL yesterday asking me about the cutouts required to make my door into a work bench so I should have it soon, then the fun can begin...
You could always solder some brass tube to the axle that is long enough to get the wheel on and drill out the wheel. This would also give you the option of having a split pin wheel retainer.

Mike
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Old May 29, 2011, 08:55 AM
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Ditto. I try to do that with all wheels. Makes a very neat solution as well as being the most secure method I've ever used.

charlie
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Old May 29, 2011, 12:32 PM
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Nice looking retracts. I am curious how they fit in the retract mounting plates. The plates are sized for the Robart mechanicals.

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Old May 29, 2011, 06:14 PM
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I'm very interested in how they work out as well. I've had my eye on these retracts for my own '109.
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Old May 30, 2011, 11:17 AM
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I've done some more measurement and found that the U/C leg length is about 1" shorter on the wing plan compared to the fuselage plan. This is good news as the legs will be shorter thus reducing the load on the retract motors.

D-Rock, The e-flite retract are the same width but a bit shorter in length so they will fit easily into the mounting plates.

BIW.

PS. My FIL will be dropping of my door/building board on Wed/Thurs after the paint dries!
I should have told him not to bother painting it but he is old school and like things to be done properly...
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Old May 30, 2011, 12:36 PM
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HI BIW, Sorry I missed the length of the gear but glad it works in your favor. Good to hear that the E-flights fit well. I think the electric retracts is the way to go. There were some linkage pains in setting up the mechanicals. I think once you have the servos and the mechanicals, it is probably cheaper with the electrics anyways . I do have to ask, whats a FIL?

D-Rock
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