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Minimoa MO2a -Chris Williams plan and Cliff Evans kit

Let us all watch your new project progress.
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chris williams
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Joined: 10 Mar 2015, 10:50
Location: Blandford Dorset

Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by chris williams »

Mick, as you will have seen from my previous post, the ribs and the slots as drawn are all identical, so that shouldn't be happening. The solution is simple: ease out the rear of the top spar slots on the ribs on which the TE is too high. This should allow them to rotate up slightly. Use the straight TE to line the ribs up. They should line up on the LE now as well

mick a
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Joined: 20 Mar 2015, 22:00
Location: kent

Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by mick a »

thanks chris
will try that , although have glued all ribs to spars , so will have to cut rib at top as you said and add strengthener in
i presume all ribs should be level across top and bottom ?
will get there ?
on sitting incedence , should i add a small piece of leading edge ?
thanks again for all your help , it’s a brilliant forum
mick

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chris williams
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Location: Blandford Dorset

Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by chris williams »

Assuming the ribs are more or less identical, setting up the TE should be sufficient. When hand cutting, there are often variations at the LE: these are usually sanded out when trimming up the LE with a sanding block

mick a
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Location: kent

Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by mick a »

thanks chris
going to give it one last go tonight, will slice the top of rib behind spar and the put new sliver in-between rib and spar
fingers crossed 👍

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chris williams
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Location: Blandford Dorset

Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by chris williams »

Don't fuss packing out the ribs, Mick, it shouldn't be necessary

mick a
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Joined: 20 Mar 2015, 22:00
Location: kent

Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by mick a »

finally 😄
got it square , or as close to before sheeting , just sliced the top of rib and lined up with trailing edge - as you said chris - just have a gap from top section of ribs to top spar, easy fix

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mick a
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Joined: 20 Mar 2015, 22:00
Location: kent

Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by mick a »

a bit more done
all good so far
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chris williams
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Location: Blandford Dorset

Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by chris williams »

A quick note for when you get to the outer wing panel, Mick... I have noticed that ribs have been plotted in Compufoil in such a way that the the aileron spar is not, as you might think, a straight taper, but is parallel out to rib 13, and tapers from there.
Also, a typo...J5 fits rib 19, not rib 20

(I've only noticed these things because my current Minimoa wings are based on the MO2a's, with the necessary mods)
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mick a
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Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by mick a »

thanks Chris
will make a note of that
does the main spar still taper from the wing join (12mm-6mm) or does that start from 13 as well ?
thanks again
mick

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chris williams
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Re: minimoa mo2a -chris williams plan and cliff evans kit

Post by chris williams »

The main spars taper from the gull join, Mick...



cw

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