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Old Oct 07, 2011, 02:35 PM
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Thanks for the comments

The Me-262 is getting closer to a ready to fly state ...

Lots of little things still to sort out like proper hatch closure etc. Hopefully I will be able to do a full dry run (4-5 min) taxi test soon, to check out batt, motors and esc temps.

I dreaded the paint mask stage, with paint seeping under the paint masks, endless retouches etc. But Ralle is right, decals just don't do well on a model that has thousands of detailed rivets, raised panels and recessed panel lines.

So paint masks it was !

.
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Old Oct 07, 2011, 02:39 PM
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More masking and taping, and hundreds of little decals. Also one of the dogs I have is facing the wrong way, a new one is on its way.

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Old Oct 07, 2011, 02:45 PM
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More touch ups, some more decals are waiting.

The colors are still quite bright at this stage, a light wash later should tone down their brightness a bit. In one instance I had to even use a gloss paint (red), as the flat one was totally unsatisfactory.
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Old Oct 08, 2011, 03:03 PM
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Herb,

As for the bleeding at the rivet holes you may want to try the mini sand blaster from Hobbycity to remove the paint. They are currently on back order. Your plane looks superb, but be careful for too long taxi runs as motors etc. may overheat.

Regards,

Andre
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Old Oct 09, 2011, 02:16 PM
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Well the bleeding is no problem, just a bit of extra cleanup work with a brush, which I have completed. I first used a blade to take some of the bleed off, and then a fine brush to touch up. You can't see anything now

I am going to do a little taxi test this afternoon at the field ...
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Old Oct 09, 2011, 06:55 PM
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Gear

I have one also. I am trying to find more details on the external placards/markings. The airplanes weak link is the main gear structure in the wing. I landed in a crosswind and damaged mine. I decided to remove the stock lite ply ribs and plate from the wing. Not a easy chore and made new ribs and gear mount plate from 1/8 G10 with the same lightening holes as the stock ribs. My nose gear is mounted to a pair of BVM CF angle stock for flexing. I cut out the gun bays to extend the battery hatch for ease of battery changes.


Keep your CG forward. Your engine out procedure is to reduce power and land.

Anybody have a idea about the T/O roll on grass? I normally fly from blacktop and require about 250'-300" before rotation.

Roy
Miami

URL="http://www.youtube.com/watch?v=n0rXab0h0Sk"]http://www.youtube.com/watch?v=n0rXab0h0Sk[/URL]
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Old Oct 10, 2011, 12:14 PM
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Hi Roy,

Yes the main retract mounts don't look like the strongest, esp. if you up the power and weight.

You can see I did some extensive work on mine, I added carbon tape all around the rib mounts, top and bottom. I also added two layers of carbon cloth laminated on the upper wing surface between the two ribs. We shall see.

I think bumpy grass will put more stress on the retract mounts. I plan to fly mine off smooth asphalt runways mainly because of this issue. I can see why the Me-262 does not like any crosswind, the rudder is just too small, with limited excursion.

On light setups I have seen takeoff rolls as short as 30-40m on very short grass.
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Old Oct 10, 2011, 12:24 PM
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I did some extensive taxi test yesterday and everything worked fine . I tested the motors, esc's, retracts, brakes, air pressure, rec. batt etc.

After taxing around ca. 5 mins the esc were still at room temp (40 deg celsius), the motors were cool. The batts (8S+8S 4000) not even warm.

I did a lot of braking, and the brakes did not lock ... After something like 10 brakes I still had air left in the small brake tank.

The main retract air tank also still had plenty of air left. The steering worked fine too, even though the right turn is a lot tighter than the left one (needs end point adjustment).

On full power, I could not hold the Me-262 by the tail ... It required two people to hold it.
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Old Oct 10, 2011, 01:03 PM
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A couple of pictures from yesterday,

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Old Oct 10, 2011, 05:34 PM
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Wemo fans

It's amazing how scale the Wemo Pro fan spinners look.
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Old Oct 11, 2011, 12:15 AM
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Hi Herb

Very nice work your Me-262 looks great! Did you get a chance to weight the Me yet? Good luck on your maiden! can't wait to see the video!
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Old Oct 11, 2011, 01:33 AM
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Quote:
Originally Posted by BadLemon View Post
Hi Herb

Very nice work your Me-262 looks great! Did you get a chance to weight the Me yet? Good luck on your maiden! can't wait to see the video!
Herb,

Would be interesting to know your AUW - mine ended up as 7.2 kg with another 60g in the tail (my plane was nose heavy). I was using 2x5S 5000 lipos, and will get flight time of close to 10 mins as I am flying on less than 1/2 throttle most of the time.

Regards,

andre
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Old Oct 11, 2011, 06:22 PM
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Andre, what's your setup?

Mine's 19.2 lbs ready to fly (8.7 kg) if my kitchen scale is right (my better, smaller scale does not go up that far).

The weight is coming from some bigger battery (8S+8S 4000's), the twin 120A esc with large heatsinks, the Robart retracts & struts with scale wheels and brakes, and things like cockpit, brake lines & servo, and some reinforcements & hysol here and there.

Also I have two 330g Het 700 motors, plus two Het shrouds with WeMoTec rotors (120g each complete).

Rtf I pull about 5200W. Static thrust should be around 2.4 kg per fan, efflux computed around 295 km/h.
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Old Oct 12, 2011, 03:56 AM
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Servus Herb

Good luck for the maiden.

greets Cat

btw. mine weighs 6.8kg with all gear doors and needs around 60m on
grass for T/O. No problems with the gear mount so far.
Around 2000-2200W all together with initial thrust of 4.1kg.
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Old Oct 12, 2011, 11:36 AM
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Herb,

I am running HET 700 motors, Moki shrouds with HET fans, Turnigy 80A controllers on 2x5S packs with Robart retracts. I still have to add scale details and final coat of clear varnish.

Regards,

andre
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