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Lacquerhead's blog
Posted by Lacquerhead | Nov 04, 2012 @ 09:31 PM | 1,890 Views
Looking back at my not-so-frequent blog postings I see it's been a year since I started looking at improving performance of my Chrysalis 2ME. A big improvement came from a horrible failure. An in-flight failure to be precise. The tail fractured after throwing a prop blade on launch so instead of adding yet more weight from yet another repair to my tail I decided to build a pod and boom fuse. I have a fist full of carbon kite spars so I thought I'd use one of those. They're a bit bendy but usable. I made a depron/fiberglass vertical stab and a removable carbon/balsa horizontal stab. The pod and boom fuse brought my AUW down to 34oz which is 2oz lower than Don's design weight. The loss of 8oz of basically dead weight came from careful attention to mass in the tail which allowed complete elimination of lead in the nose and the use of a smaller battery pack. I was finally able to adjust CG by moving the battery pack around but I ended up with the pack pushed up against the F2 former. Performance cannot be questioned and the speed range of Don's wing continues to impress me.

This graph shows initial climb to 200m in about 20 seconds when the ALES switch shut off the juice. The big drops in altitude are due to me popping the spoilers to loose altitude and practice contest style decent. I still need to get a feel for the relationship between altitude and time so I expect to be doing that frequently. Even with three big intentional decents this ended up being a 33 minute flight.


Posted by Lacquerhead | Jun 26, 2012 @ 05:37 PM | 1,793 Views
Once upon a time I was pondering a 2M RES for noodling around the sky. Recently I was contacted by a couple of nice gents from here on RCG and I think I may pick that gauntlet up again after I finish building my Bird of Time. Maybe I'll call it the Birt of Dime but it's original name was the Beaky Buzzard, named after the rather daft buzzard that pestered Bugs Bunny in so many cartoons. Here's the raw design in XFLR5. The tail looks too small though. I need to run it through a stability analysis still but I expect it will grow quite a bit in span.
Posted by Lacquerhead | Nov 15, 2011 @ 05:59 PM | 2,435 Views
I had a uneventful day so I took advantage of a passing occluded front and pending cold front fighting each other to a stalemate. Winds were calm and skies completely overcast, temperature 78F. I suppose it could be better from a test flight perspective if we had standard pressure and sea-level density altitude but this will have to do.

Power section consists of the following kit:
E-Flite Park 480 1020kV (reverse mounted, ugly home made fiberglass fairing)
Esprit Model 1800mAh 3s LiPo (45C nominal)
Castle Creations Phoenix ICE 50 Lite ESC
Graupner CAM 12x6 folder
Super Heavy Penetration Bird @ 42oz

I will now officially say this power system is likely overkill but it gets the job done quickly. Climb rate is a bit over 1500ft/min and puts me at 660ft in 25 seconds. Goal met! Now I just have to wait until the next ALES contest and start measuring myself against my peers!

I certainly can't blame the gear. I don't even need to break the 900ft. mark to make a 10 minute flight as long as I can stay out of sink. This is completely do-able. Now the only thing I can blame is myself.
Posted by Lacquerhead | Nov 07, 2011 @ 04:30 PM | 2,451 Views
Chrysalis 2M AUW 950g - 33.5oz
Chrysalis 2M-E AUW (front-mount outrunner, 1800mAh 3S) - 1.2kg - 42oz
Posted by Lacquerhead | Nov 07, 2011 @ 03:08 PM | 2,600 Views
After a quick discussion with Don Stackhouse I decided to go ahead and mount my outrunner backwards in an attempt to gain more room in the nose and eliminate the 3 oz of dead lead. To that end I've acquired a E-Flite Park 480 since that looks to be the best locally available compromise of price, quality and performance. I also bought a 12x6 Grauper folder to better fit the output of the 480. I just finished assembling everything and made my first bench test of the Park 480. Fingers crossed for good weather soon so I can put a flight on it!
Posted by Lacquerhead | Jan 30, 2011 @ 12:10 PM | 2,907 Views
I've been flying the Chrysalis 2M for a while now with the motorized fuse and I have to say that I'm nothing less than thrilled with it. I've had several flights of well over 15 minutes and a couple bumping up against 20. If I were a bit more brave (foolish?) I would stay in the boomers I've found longer and get the model even higher.

I have two sunburst type stripes on the bottom of the wing to aid in visibility against clouds but honestly the white wings are what I see against the skies around Dallas. The red often gets lost against the dark blue sky. This still comes down to "follow the guidelines but do what works best for you". As I gain more experience and learn more about how my eyes and brain work as an individual I will adjust my color schemes to maximize visibility. Many times I've been asked by powered flight guys where my sailplane is and they've not been able to see it. Perhaps vision is part of what separates sailplane pilots from our powered brethren.

I have been struggling in getting the spoilers working as intended on the plans. I could never seem to get the bends in the safety wire pushrod tight enough and they always worked themselves out of the control horns. I think I will end up fabricating a different mechanism. If I were building the wing again I might be more inclined to build a platform for the servos and just push the spoilers up with the control horn. They would require some sort of positive closure of course. Most likely that would be some sort of elastic mechanism. When I added spoilers to my Sophisticated Lady I had plenty of wing to work with. The Chrysalis wing is significantly thinner so care must be taken when fabricating the spoiler mechanism.
Posted by Lacquerhead | Nov 28, 2010 @ 11:26 PM | 3,113 Views
The fuse is done and I'm starting to put electronics in it. I have the servos mounted and picked up another AR7000 today. Somehow it seems nobody local has full range 6-channel Spektrum receivers. One wasted channel but it's for future growth, right?

The right wingtip is finished and in about half an hour the right center panel will be completed. I'm really getting tired of cutting and fitting these 1/16th sheet panels for the poly breaks. I wish these were also laser cut. Maybe Don will add these on a later revision.
Posted by Lacquerhead | Nov 06, 2010 @ 11:57 AM | 3,212 Views
The fuse is built and waiting for control surfaces and the make pretty. I've finally decided on a color scheme for all my aircraft. Being of Japanese decent I think I'm going to do a Rising Sun on the bottom of the aircraft with the sun offset on the starboard wing. A friend of mine wanted to paint his Mazda RX-7 like that and it kind of stuck in my brain. Here's to hoping I don't completely fail at heat shrink film!