Does anyone have a working or non-working MPC "Lectra-Launch" luanhc controller?

If so, please post measurements and / or tracings . . . I would like to try to duplicate the unit, possibly enlisting someone to 3-D print it.

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A few more items . . .

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Well I have a working one (it's been bench tested, it will likely launch its first rocket on October 7, weather permitting). See first post in this thread.

It looks like you have all the parts to measure, or are all those pictures from someone else?

It's interesting too, looking at the instructions, half of which you posted, as those are different (and I presume earlier) than the ones I posted in Earl's other thread — the ones that came with the unit in the first post of this thread.

Yours shows the square firing button, and also has the builder attach the brass parts to the wiring. In mine the button is round and the brass bits were already crimped to the wires.

So, we now have at least partial documentation of two versions of this thing.

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Bernard Cawley
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Those were pics I found online, unfortunately.

Dave F.

more items . . .

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	MPC Lunar Lectric controller.pdf (607.4 KB, 3 views)
	MPC Model Rocket First Release-Lunar Lectric System.pdf (752.6 KB, 4 views)

Measuring the thing will be kind of awkward as it's all curves. I'm not good enough at 3D modeling in CAD to know even what would be useful.

Perhaps Jack Hydrazine can enlighten us both. I'd be OK with taking this one apart again after the launch where I want to use it to facilitate documenting it properly if I had a good idea how to go about it.

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Bernard Cawley
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I hope we have someone on the forum who is able to accurately measure it . . . Fingers crossed !

Dave F.

Indeed. Even some guidance as to how to usefully measure that no-straight-lines shape would be useful. I'd be willing to try.

Look at the later instructions which you posted as an attachment to your post 15 (this is a scan I made and put up here on YORF in another thread just two days ago) and compare with the two pages from the earlier version which you put up in post 12 and again in post 15. They show how the controller changed from one version to another. For your purposes would it matter which version got measured?

There's some other duplication, too...the first image in your post 15 was posted by Jeff Jenkins in post 6 of this thread. The first attachment in post 15 is also in Earl's MPC literature thread here on YORF. But those NASM images are some additional good detail.

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Bernard Cawley
NAR 89040 L1 - Life Member
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AMA 42160
KG7AIE

It makes no difference. I suspect they were identical except, perhaps, a different top plate, due to the different switches used,

Dave F.

OK. If I can get a little education on how to measure such a swoopy set of shapes in a useful way, I will do what I can.

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Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE