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Old Oct 25, 2012, 12:42 AM
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Got my full scale propellers!

Hi All,

Well, after months of faffing about with the 3d model I have finally got the full scale propellers back from the printers, and I couldn't be happier

They look great on the plane (even though mine is a bit worn ) and upon initial taxi tests, they seem to perform just as expected. I won't be able to do proper throttle tests until I have made the mold and cast some props from the correct material. These props are just the plastic from the printer and it's a little brittle. That should be by the end of next week.

In the mean time here are some pics to enjoy.

Cheers,

Steve

Here is the latest flight video (as of 18/11/2012)

Fw-190 1400mm (FMS) Custom Scale Propellers Flight Footage (6 min 18 sec)


And here is a preview video

Full scale propellers for FMS 1.4 FW-190 (1 min 20 sec)
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Old Oct 25, 2012, 04:48 AM
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Looks good Steve are you going 4s
Or 5s
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Old Oct 25, 2012, 05:16 AM
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4s for the first batch of trials. The blade is a lot bigger than stock so 5s will not be on the cards.

Also have a 420KV motor just in case the stock motors RPM is too high, or it's not got enough torque. I think it will be fine though.
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Old Oct 27, 2012, 04:43 AM
4 blades! Scale blades!
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Quote:
Originally Posted by dambit View Post
Hi All,

Well, after months of faffing about with the 3d model I have finally got the full scale propellers back from the printers, and I couldn't be happier

They look great on the plane (even though mine is a bit worn ) and upon initial taxi tests, they seem to perform just as expected. I won't be able to do proper throttle tests until I have made the mold and cast some props from the correct material. These props are just the plastic from the printer and it's a little brittle. That should be by the end of next week.

In the mean time here are some pics to enjoy.

Cheers,

Steve

And here is a preview video

http://www.youtube.com/watch?v=Z9-f3...ature=youtu.be
I love the look of this props. Are expected to perform ok with the stock motor and ESC? Are you planning to sell the sets? I'm in!
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Old Oct 27, 2012, 09:02 AM
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Hi mate,

My goal is to have these work with the stock power train the plane comes with, however I wont know how much current they draw etc until later this week. I ran out of material to make the mold so I am just waiting for a new batch of material to arrive.

Once I sort out the power details and get the mold process sorted, I do intend on selling them. I know there are at least a few people out there who will appreciate a set of functional scale blades for their 190's.

Cheers,

Steve
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Old Oct 27, 2012, 09:16 AM
4 blades! Scale blades!
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Just let me know mate!

Well done.
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Old Oct 27, 2012, 05:13 PM
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I have been using a set of steves shorter scale blades he originally made with more pitch on my fms bf109 and very impressed with them
They balanced perfectly and due to the paddle and increased pitch I was getting better performance out if my 109 with no extra heat or noticeable change in flight times
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Old Oct 29, 2012, 06:52 AM
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Ok all,

The first half of the mold is curing as I type and will hopefully be set in the morning. I am hoping to have the mold completed by Wednesday and therefore have the first set of cast blades ready to go by the afternoon.

Cheers,

Steve
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Old Oct 29, 2012, 05:45 PM
4 blades! Scale blades!
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Very nice!

What do you use for the prop material?
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Old Oct 29, 2012, 07:20 PM
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I use a material called smooth-on Onyx. It's a two part resin and has so far proven to be quite a good material.
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Old Oct 29, 2012, 07:27 PM
4 blades! Scale blades!
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Cool!
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Old Oct 30, 2012, 08:47 AM
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Mold is all done now. It turned out perfect

I have cast my first set of blades but I need to redo one as the mold wasn't clamped correctly causing that blade to weigh 1g less than the other two ?? No big deal.

I'll be doing amp draw tests tomorrow and based on the results may or may not have a fly.

Cheers,

Steve

Here is a few shots from down at the field today. Took it out for a pose
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Old Oct 30, 2012, 09:56 AM
4 blades! Scale blades!
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Lots of success there!!!
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Old Oct 31, 2012, 05:44 AM
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I've added the test flight video to the first post in this blog thread.

The flight went very well, but I do need to increase the pitch very slightly.

At WOT the motor was drawing 43A and consuming 600W of power. Plenty of room for a pitch increase
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Old Oct 31, 2012, 07:16 AM
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Ok,

I have now put a 1mm shim in the blade root and have done a static throttle run up with the watts meter. 776 watts peak at WOT, much better than without the shims.

Here is a screen grab from the video.
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