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Old May 12, 2011, 05:52 AM
2014 EDF JET JAM We be Jamming
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Looking good Herb!
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Old May 12, 2011, 05:33 PM
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Stop weighing everything and get er done Herb!!!! Looking forward to test flying it
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Old May 12, 2011, 10:20 PM
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Thanks guys

Believe me the weighing is by far the easiest part ...

Took me two weeks just to figure out which Robart parts were the right ones (Thanks Chris !!) ... $500+ in landing gear struts wheels etc and I have not even started on the damn thing... Even Fritz above was shipped from the UK.

Cutting out the gear doors and canopy is next.
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Old May 12, 2011, 10:26 PM
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I hear ya on the price. It's why I have not started mine yet. I need to finish a couple other projects before plunking down the cash for all the gear. I'm watching your build with great interest though
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Old May 16, 2011, 12:36 AM
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Started to cut our the gear doors ... mostly with a dremel, a router bit and then a fresh razor blade.

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Old May 16, 2011, 12:39 AM
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The wing construction is a fiberglass-airex-fiberglass composite sandwich, with generous carbon reinforcements around the spar area, and what seem rather solid wood retract mounts.

The Robart mains fit right in ... Shown are 3.75 inch wheels.

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Old May 20, 2011, 02:57 PM
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There are only very minimal instructions with this kit ("now glue in the front retract formers" ... ), which required that one very carefully measure and scale up the appropriate size of wheels and struts from a scale drawing of the Me-262.

The result of this exercise is the Robart struts I picked worked out perfect in length, whereas the nosegear is a tad longer.

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Old May 20, 2011, 03:00 PM
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Scaled up dimensions from the first 3-d drawing above requires the strut to end at the blue marks below.

Also the angle of the extented nosegear strut has to match the oringinal, and the strut has to retract completely into the fuse, allowing then the gear door to be closed.

The latter requires that the geardoor be extended by almost 3/4 inch to get the nosgear retracted.

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Old May 20, 2011, 03:04 PM
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I've seen an Me-262 recently for sale on RCU and the nosegear on that one looks a bit suspicious when compared to a scale diagram of the original

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Old May 20, 2011, 03:08 PM
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The mains do not seem to pose any further issues, the only remaining minor point is that the mounts will have to be rienforced as they look a bit weak.

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Old May 20, 2011, 03:13 PM
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As stated the nosegear mount requires some rather fine ajustments in location, so that the nosegear strut sits right, and retracts properly.

The whole nosegear mount had to be fabricated out of plywood and G-10.

One more test needs to be performed, by setting the Me-262 tentatively on it's feet to see if the strut length, and nosegear retract depth, look right.

The last thing one wants is the nose pointing down

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Old May 20, 2011, 06:51 PM
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The nosegear ply box so far, wood is so easy to work with & easy on the lungs ... very strong & lightweight too when laminated with epoxy.

A section of the fuse will tear out before the box gives ...

.
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Old May 22, 2011, 12:30 AM
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Hi Herb,

Congratulation! you will not be disappointed.
This bird flies so well.
Mine has 6.8kg flying weight. And Im using the e-flite retracts with robart struts.
I had some troubles with the electronics before.
But i found out, that i did not program the point for gear up/gear down on
the doorsequencer in the correct way. Now it is working fine.
And the gear has now his own electric circuit, directly powered by a 2s 1000mAh pack. It is good for around 200 cycles.
My cg is at 140mm back from the point where the wing meets the fuse with
gear up.
I am using MOKI Impeller with WeMoTec MIDI Rotors on Mega 22/20/3
with 5s5200er each side. 4.1kg of thrust.
Due to the low wing loading, the plane takes off from grass easily.

Have fun

Cat
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Old May 22, 2011, 02:38 PM
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Servus Catman,

Thanks for your comments !

I had those Mega 20/3 in the Aeronaut Rafale (and a Jepe Spitfire) and their efficiency was miserable, aren't they a bit too small for the Me-262??

I swapped them out in the Rafale for twin Hacker B-50 (with similar kv) and the difference was day and night ...

The Mega 20's have decent efficiencies only up to 800-1000W then they drop precipitously.

The Mega 30 series were a bit better, but still worse than the $19 HC 56 inrunner that have outlasted all Megas and Kontronics I have owned

http://www.rcgroups.com/forums/showt...=915522&pp=100

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Last edited by Herb; May 22, 2011 at 02:51 PM.
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Old May 22, 2011, 02:51 PM
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Managed to get a bit more work done on the nose retract unit, installed and tested the pull-pull system.

That way I can later install the set & tested complete nosgear unit into the front fuse without getting a hernia trying to fine adjust things.

.
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