Brian, even with all paint, the 300 gram wing weight ( I assume about 600 squares) is within reach. I build mono panels at around 550 squares all paint and no honeycombing, and get about 330-350 grams panel weights. Equipment adds around another 60-70 grams.

About the only base color which would finish heavier is yellow. Yellow just doesn't cover as well as the other colors do, and I've tried dope, polyu enamel, epoxy enamel, water based acrylic, and the dope variant-- S T I T S. Many years ago DuPont made a great lacquer in yellow that covered well applied light. It no longer exists of course.

I have not tried any of the Chroma colors from DuPont and I know from talking with Bob Hunt (CL) that Chroma is really terrific stuff. But then again it's from DuPont with the appropriate sticker shock

Hi Matt,
Yes, 300g would be easily attainable if I used the 0.2oz veil on the outside.
The 0.3oz will take quite a lot extra to fill to a 'paint ready' surface. So I will pay a weight penalty for using this.
However for these particular wings , with the low % tip sections, I think it will be worth the penalty. I have had flexing wing tips on a bipe already (due to some strut issues) and it is difficult to handle, especially in turbulent conditions.
Also as the surface is so hard and stiff I don't think the honeycomb pattern will show through very much if at all !?? Maybe use smaller cut-outs with the 0.2oz.

Brian

Let me suggest you do it a bit differently if you ever go down this path again. Use the 0.3 on the inside and esaki tissue or light silkspan on the outside. Esaki is a little stiffer than silkspan but more expensive and weight is a wash. But the covering is not very ding resistant. Lots of TLC must be used.

Either paper fills quicker than the carbon veils. Still, I don't wet sand until the very end after the base coat is applied. I use fewer nitrate coats on the paper which isn't quite water proof until after the primer. Strength is not an issue with the combo...remember I used a DLE55 on the Delta originally. This big block was not very friendly to the composite fuse but the wings/stabs were/are fine.

I will be building a set of wings/stabs for my new Congruence design at some point and I may honeycomb them both.The technique can shave up to 40% of the original foam weight so it's a worthwhile effort....

BTW-- I have a new hybrid 22x10 prop patterned after the 21x10 apc nearing completion. I think the 185 will spool up well with this load up front. Weight is less than 100 grams. It's gonna be a very interesting experiment.....

Hi Matt,
Thank you, and yes I had already reached the conclusion re the 0.3oz on the inside.With that on the inside and tissue or the 0.2 on the outside the composite effect would still be there allbeit with a less resilient surface from hanger rash point of view.
One piece bipe wings get a lot of handling at assembly and disassembly - not funny in a 25mph gusting wind out in the open - we do not have shelters where we fly and it is mostly windy.
All good fun.

Brian

Hi,
Have all the small parts sanded after applying the sanding sealer, tail halves,elevators,ailerons and the rudder. Wings awaiting further assembly work.
I have glassed (0.5 to 0.75 oz) models in the past and this stuff takes more sanding - to my surprise !!
The 0.3oz seems very different to the 0.2oz in this regard. It does take a lot more dope to seal to begin with.
Anyway I am able to use sharp 400gt wet paper to flat this. Even with the 400gt I had a lot of sanding on these parts and using considerable pressure.
They are finish sanded with 600gt.
The 0.3oz carbon has a big advantage over glass for this process - you can see exactly what is happening !!

Matt, The second pic is both tail halves c/w elevators on the scales - not to bad but weight is up some !??. The third is one of yours taken from your 'covering balsa with carbon veil' thread for reference.

Brian

Hi Brian,

I agree, slightly over 4 ounces for the whole stab w/ elevators is a really good weight.

One of the main reasons i don't use 0.3 or heavier grades of carbon veil outside. Weight sounds great but the actual application takes more dope than one thinks.

Years ago when I first used carbon veil, the 0.5 variety was the first weight I used. It was not satisfactory weight-wise. Wound up snading it all off, what a PITA. But boy was it stiff. Anyway, the 0.2 was the one that produced the better results on the outside. Eventually I returned to light paper on the outside and veil on the inside. It seems to be the best of all the worlds so to speak, for those that love to finish in paint rather than wrinkle kote.

Hi Matt,
I got some zink stearate in today.
Impressive stuff and not too expensive. €25 for a kilo, which is not bad for a one off order from a lab,, supplier.
A 30cc dispensing cup filled with talc (patted down and filled flush with the top) weighed 20g.
The same cup filled with zink stearate weighed 15g. The cup weighed 2g.
Thats 18g for the talc V 13g for the same volume of zink stearate.
I can see or feel no difference in how finely ground one is versus the other.
That should make a difference to the weight that the sanding sealer coats add.

Brian

Hi,
I've been beaten to it !
Gernot Bruckmann's new model.
A revisit to the Sensation c/w new wings and all moving tail.

At AUW less than 4Kg !!!!!!!

I wonder is he using one of the new contras with a 6S to 8S heli motor ??

Brian

PS ; I've put this here to avoid opening a new thread.

Hello

Pics of motor Gernot plane shot by friend Jean Michel in Salzburg contest.
Battery is 8S.
Claude

I borrowed a Dash 5 from the Hydes years ago that Merle had converted to all flying surfaces including the rudder and wings. In spite of a lot of throw in the wings the plane would not snap well if at all. The plane was strange to look at when you rocked the wings while taxiing and got a lot of looks but I would not recommend it.

Jim O

Looks pretty small. But hey, whatever rocks your boat.

Did you fly yours yet?

Hi Matt,
The original Sensation was indeed quite small, area wise.
This looks a little bigger, but not much.

No Matt, I had to park it for a collection of reasons. Amongst them, it had got too far into the last season and I needed some stick time.
Also I just wasn't happy with the weight build up using talc.
I got some sink stearate but it was not behaving properly - I hadn't a clue how to use it.
I have just recently got some good guidance.
Mostly though I got into real difficulty with my back - both upper and lower - a long story - old war wounds and all that.
We have had other 'life' stuff going on as well - mostly good though.

Getting back to it this week - Alex and Isaac are inspiring me some.

Brian