silentsurfer's blog View Details
Posted by silentsurfer | Oct 03, 2011 @ 07:40 PM | 3,522 Views
...between a recent increased workload, and my Fathers passing (last week) i havent been too active or focused on R/C lately,,

I did however do some mending and modifications to My Amos Moses.
Namely she got a new nose-job, increased wing area, i re-hinged the ailerons, and added Landing Gear, including a steerable tailwheel! yeah!

Since (re)learning to fly, ive never really had a plane w/gear.

I tried to rush out Sat. and (re)maiden her in the Apt complex parking lot,, woe, was That a failure.
Adding about 3/4" (~19mm) to the leading edge had thrown the CG considerably off, and this plane is kinda short-coupled anyway,
and blacktop is Not very forgiving,,, i added a longer battery attaching velcro strip to allow me some more adjustment.

Went out again tonight just before dark, and after a little bit of fussing and adjusting, got her airborn, and commenced to start negotiating the ground.
I gotta tell ya, adding the pavement to the mix adds a whole new dimension to the flight envelope, and before long (I admit) i was fairly having a Blast with her until a finally threw a wheel and called it quits. ...Continue Reading
Posted by silentsurfer | Sep 01, 2011 @ 06:12 PM | 3,997 Views
My Fav little foamie has taken a beating over the years,,,
it had gotten to where the entire Mtr/Mnt was just kinda flopping around in any ol' direction (it was originally only a taped-in tube mount to begin with) still flew fine, but,,
even tho i have fairly definite plans of building another duplicate Flash soon... i wanted to correct all that 'slop'.

When any one bird has given this much faithful service over the years, And remained (basically) Intact, well,, you owe to Her Right!?

DSCN1409.MOV (0 min 17 sec)
Posted by silentsurfer | Aug 19, 2011 @ 08:16 AM | 4,104 Views
I'm initiating this is in anticipation of upgrading my HBZ Supercub, and ultimately adding Floats to her as well.
...soon as my workbench and approximately 2.5 projects are cleared off.
In the meantime, i want to do a little research, make some notes, collect some links, and (hopefully) answere some questions.

I'm tentatively proposing to:
1.) Go Brushless, whether outrunner or inrunner w/the stock gearbox,, [not sure why, but the inrunner idea kinda appeals to me?]
2.) swap out the components for 'hobby-grade' gear,
3.) add Ailerons, (likely using 2 servos + Y-harness)
4.) add CF spar, and dihedral brace,,
5.) heatshrink some thin CF rod to the wingstruts. or (possibly?) fabricate entirely new struts?
6.) check and re-install the landing gear (which i have Never used) and find some Large wheels for using off the grass, rough turf etc.
7.) add a (balsa) wood TE wingsaddle brace.
Posted by silentsurfer | Aug 07, 2011 @ 09:22 AM | 4,883 Views
...this will be the 4th of these ive built now, all have flown fairly successfully.

The idea on this one was to kinda help further a co-workers RC aspirations, and where-ever possible utilize his old Aero Voyager parts, including the radio, brushed motor, and proprietary Rx/ESC unit,, this presents some interesting challenges, and from the beginning even, wasnt something i was sure i wanted to fool with. lol

i suppose i shouldve tested everything out first, but didnt initially have the Tx,,
at that point, I was goin for the build regardless, it shouldnt be too hard to swap out components later if i really had to, to make this a reasonably flyable wing,,,
Posted by silentsurfer | May 30, 2011 @ 09:45 PM | 5,548 Views
i started another wing (about a week or 2 ago?), based on the 16" KFm4 David wing (here)
this is probably the closest ive come to doing anything 'micro', and im kinda determined to make a flyable wing,, this one really caught my eye,,,

mine is:
22" span, 3mm +6mm depron,
hxt 10g 1800-2000kv? motor
(2) DYS 3.7g servos,
blue arrow R3P5 Rx
near completed airframe weight: 89g (currently)

shes actually fairly close to finished now,
just want to add some wingtiplets (which are omitted on the original modedl), maybe do some tweaking,
just wanted to share some thoughts and pics,,, probably in semi-Random order now as its after-the-fact,,,
Posted by silentsurfer | May 09, 2011 @ 09:43 PM | 5,716 Views
got a little restless,, started another build (lol)
F-16 semi scale, 19.5 span, 30 long, Profile pusher parkjet,,
8mm EPP for ~2208 class mtr and small 3s,,

i had gleaned over several F-16 threads here on RCG, and actually liked the one presented by Hans Joachim, but even with the 65% plans i couldnt quite achieve the size i wanted, so i basically just took some lo-rez scale F-16 3-views from the plans sub-forum and butchered-em up in photoshop a bit, made some mental calcs, set my printer to 9-page poster, and got lucky,,,

got it all on (1) 12x36" sheet of EPP, and started cutting and gluing,,,
lay it out, cut it out, glue parts together (i used 5-min epoxy)
Posted by silentsurfer | Apr 15, 2011 @ 10:57 PM | 5,708 Views
i started a wing,
i had salvaged some pink FFF that had been in back of my jeep forever now, thinking it was just too warped to be of much use,, but now im thinking i might use the 'bow' to my advantage, if i cut my panels out accordingly, so as to utilize the arc as part of the airfoil,, maybe,,, genious huh?
of course that didnt really happen,
i simply cut it out as best suited efficient use of the foam lol

i sandwiched some 3/32" basswood spars between some fanfold
(3/32: 16x3/16x7/16") and attempted to keep the bottom panels reasonably flat,,
i used an old wing pattern i had found on the internet (maybe from SloperSteves wing designer?) ...i dunno, but it was a 15" half-panel giving me a 30" span, fairly broad corded, and not too steeply swept,,, maybe i just liked the 'look' of it, who knows,,,
should be pretty straight forward, and a quick build, using regular gear i have on hand.
Posted by silentsurfer | Apr 09, 2011 @ 07:54 PM | 5,569 Views
i built this baby almost a month ago now...?
it's totally based on Daves KFm4 Superfly (clone, in Depron) which is itself based on the popular Superfly (EPP delta) to which thread ive posted it,,,
...however at Daves prodding (and my own curiousity) i now intend to try and familiarize myself with her flight characteristics, and then later add the KF steps
which were/are ...integral? to his build, and attempt to recognize and determine a comparative analysis between the two,,, thus ive opened this 'thread' here on my blog as an initiation and place-holder for any later developements.
Posted by silentsurfer | Mar 22, 2011 @ 10:32 PM | 6,046 Views
ive started a build based on the Nico Hobbies mini F-15 parkjet.
I saw Adams first posting back in April 2009, and thought, 'oh cool, i wanna do one too', i followed it awhile, fascinated,, thinking it could be a fun build, well suited to my talent level, maybe? lol
but several posts later it became evident he (they?) were going into 'production' with it,, although i had printed out the plans and made an top-side-view profile 'template' out of luan, i then mustve gone another direction for awhile...

anyway, here, now almost 2 yrs and several computers later, i found the template, plans, and finally tracked down the original thread again and started building....
i havent really planned out a 'build-thread', but,, i sometimes enjoy documenting some of the progress (or lack of) along the way anyhow,,, ,, , , , , ,
Posted by silentsurfer | Aug 30, 2009 @ 06:02 PM | 6,346 Views
this will be my build log of the Mig3 in depron (or mixed-medium) which is being graciously taught online here by Hans.

Progress: (currently limited basically to pre~preparation) ...basically stalled, pending the (slowly) nearing completion of my Mirage 2000.
ive printed out the Plans, which seem accurately rendered,,
ive ordered and received 6mm depron, and acquired some (~6mm) FFF,
ive begun viewing the tutorial build videos, and attempt to monitor the lead thread postings, and peruse participants build logs.

..although i feel its very much to my benefit to have the foresight of the others endeavors at my disposal to aid my build, and (hopefully) prevent any obvious mistakes or trouble-some areas, i must find a way (and workspace) to actively work on Both projects. I am NOT a multi-tasker lol
I fully hope to at least cut out the templates, if not also the parts soon, as the deadline is quickly approaching.
Posted by silentsurfer | Jun 06, 2009 @ 10:25 PM | 6,657 Views
actually this took me longer than 20 mins
(mostly because of making the 'blank'or 'plug') but it could easily have been accomplished, perhaps in an rougher form, using 5min epoxy...

this PETG material people recommend using can get a little pricey, fortunately ive been saving scraps of clear plastic (packaging material) basically all my life, for making flat windows, or other various drawing related tasks...
the biggest problem for me at the moment is simply access to my oven, which hasnt seen daylight since whenever, and subsequently has a mass of crap piled up in front of it...

this is just basically a styrafoam 'cooler', i had saved because its an fairly dense foam and nicely flat and reasonably thick,, knew i'd be using for something eventually...
im sure you could just as easily use an old bookshelf speaker cabinet,
or even a cardboard box (if you taped it enough to be reasonably airtight)

my key to a good seal was to utilize the foams thickness (~1.75")
and create a tapered hole, i did this by making an undesized hole initially and then basically sanding it to final shape by simply wrapping some sandpaper around a length of an old pool cue of appropriate diameter. (use whatcha got eh) ..just stick it (the vac hose) in firmly, simple.

as i planned to tape over the pegboard to seal it, i saw no reason (at this point) to bother affixing it in any more permanent manner (IE: gluing it)should i later come up with an more robust design, i could now still yet...Continue Reading
Posted by silentsurfer | May 24, 2009 @ 09:10 AM | 8,913 Views
ive been bitten by the Pusher-jet bug,
dunno why, i dont know jack about jets, or go-fast anything,,
i wanted to model a Mirage2000C or there-abouts, and did my usual (minimal) re-search, and found some of the incredible builds these guys were doing here on RCG!

this is blatantly copied and directly modeled after (GGRN) Phillipe's Mirage 2000 pusher, whos work (amongst others) i find extraordinary.
...ive NO idea what im doing, so pls dont be offended if ya catch me lurking 'round the jet forums.
Posted by silentsurfer | Apr 04, 2009 @ 11:16 PM | 6,843 Views
ive long wanted to do this ever since i first heard of, and became interested in 'brusless' motors,,,
to take a 'stock' CDRom motor, wire it up, test (now that ive some capability) and then proceed to 'upgrade' into an usable little power-plant.

Stock CDRom motor #1 24mm
1.) Io 2s800 8C venom (initial test)
75rpm static ?? (sensor not legitimately attached yet)
0.2A, 7.5v, (rpm n/a)

2.) 2nd sensor attached (rpm#1) clipped on (also) 7787rpm
(globee unstable)

3.) 3s610 20C rhino (Io) 0.2A, 12.3v, 12139rpm (12750 globee)

4.) 2s1000 20C loongmax gws8040D (in pusher-mode) shortened-run, ,,,reversed prop

5.) 2s1000 gws 8040 1.1A, 7.2v, 3980rpm? kinda slow (still in pusher!? lol)

6.) 2s1000 gws8040 (reversed phase connections A+B)
1.1A, 7.1v, 4111rpm?

7.) 3s610 gws8040D
1.9A, 11.9v, 5490rpm (5520rpm globee) 120 grams/4.2 oz.
1.9A, 11.8v, 117 grams/4.095 oz.

still fairly slow (blows some air tho), some slight warmth
no idea of turn count yet, guessing 28-30awg?,
stator is roughly 30-40% (?) full??
E-tree data coincided reasonably well with these figures,
...will proceed by considering stator-carrier (tube?) options, then mags, rewind,, if the shaft/can connection holds up.
Posted by silentsurfer | Mar 24, 2009 @ 09:58 PM | 7,159 Views
its really deceiving, cause its so smooth and quiet,
but once leaning near to get a tach read, i found myself frozen for a moment,,, suddenly realizing where my hands were,,, you could see no sign of a prop! guess it was spinning so fast lol

my no load (prop-disc) is basically a failure, it just sucks current.
and since my optical tach is only marginally reliable (indoors) anyway,
i'll be discontinuing it and relying solely on the Eagletree for rpm.
Note: ive still no Rm measuring device.
im annoyed, but... all this testing was largely for fun anyway so,
also, i didnt record any Io without the disc attached this round, so
all i really have is the 3s/gws8040 data from my gear.

aside from Rm, accurate Io, and my scale reads (which ive long suspected to be an oz. or so off) i'd say we're in the same ballpark.
Im gonna Have to build sumthin fer diz baby!

gws8040D 3s610 20C Rhino (wattmeter/globee/scale)
8.8A, 10.4v, 9960rpm ? 459g/17.901 oz.
8.3A, 10.1v, (rpm n/a) 407g/15.873 oz.

EagletreeV3 recorder file transcription
(3s610 w/gws8040)
02:25.00 10.28v, 8.90A, 10302rpm
02:28.00 10.18v, 8.71A, 10204rpm
02:32.00 10.08v, 8.53A, 10013rpm
02:35.00 10.00v, 8.40A, 10107rpm
02:39.00 9.95v, 8.40A, 10013rpm
02:43.00 9.90v, 8.34A, 9920rpm
02:48.00 9.88v, 8.28A, 9920rpm
02:48.00 9.88v, 8.28A, 9920rpm

Daves data
Tgy 2730 13T 24g dLRK Wye (V2)
Kv 1434 (17212r/12.08v) Io = 0.49 Rm = 0.168
Kv 1441 (11701r/8.12v) Io = 0.36 Rm = 0.168

GWS 8040 HD Hex 620 3S
10311 rpm @ 10.31v/8.42a 544 grams 19.2 oz/thrust 80.8% Efficient
GWS 8040 HD Hex 1050 3S
11290 rpm @ 11.76v/10.06a 656 grams 23.1 oz/thrust 78.6% Efficient
Posted by silentsurfer | Mar 22, 2009 @ 11:48 AM | 6,975 Views
ive initiated this thread before having started in any way on the actual build,, in an attempt/the hopes of maybe gathering some interest and/or assistance in pre-determining the expected/potential increase/differential in performance.

the 'concept' is to take the stock 257 and basically add to it a bit....

stock : (upgrade)
22x4mm stator: (increase to 22x5mm = +1mm (25% stator increase)
4x4x1.5mm mags: (increase to 5x5x1.5mm mags, another 25%?? in area/volume?)

...which by my current thinking should drop Kv (by an equivalent 25% perhaps??)(also of course adding weight, the % which is as yet undetermined) and thus might allow for winding compensation:
IE: dropping a couple turns to retain original Kv, allowing for heavier gauge wire, reducing resistance.... etc etc

this of course will require alteration to the hardware, but i think it within my means.
Posted by silentsurfer | Mar 01, 2009 @ 09:08 PM | 7,174 Views
build #2, still trying to get more comfortable with: dLRK, sharp teeny stators, mag placement, measurement accuracy,,,

i have to confess, much as i luv Don and the 'concept'
of the Magnet-Spacer,, in hindsight, ive had very little real success with em.

ive subsequently been using the 'bits-of-wire' method which Da V
had posted in the KH278 thread .
Its fairly tedious, but once you find the proper diameter wire,, very
effective oddly enough.
btw Roto-calc is a great tool for this as well, tho ive usually had to
over-gauge its recommendation for 'Gap between
magnets' somewhat.

my ponderance Now is:
should i just leave these bits-o-wire in there??

i had been prying them back out, and then filling the gaps with an
(15min) epoxy/micro-baloon mix, somewhat painstakingly applied
with earbud (q-tip) stems, and then the excess continually dabbed
off with another earbud dipped in acetone as it starts to set,,,
fairly 'frenzied' work w/15 min i tell ya!
..but in the end, fairly decent results so far.
Posted by silentsurfer | Feb 15, 2009 @ 07:59 PM | 8,333 Views
ive recently acquired some parts with which to build a couple KH-257's,,,
as much as i like the 'concept' of these motors, actually winding them is nothing short of a Fight (for me).

the 22mm stators are very small, tight-toothed, and rough (very sharp edged) poorly insulated,,, the usual,

my target (16t25awg) is not going well, having the usual problems (CCW winds, transitions, loosing turn count, and not being able to 'see' the winds)
not to mention the initial/ongoing questions (in my mind) of exactly what constitutes a 'classic' dLRK winding chart to begin with!?
..which (Ralph?) attempts to clear up to some satisfaction, or would were my comprehension of the language translation a little better perhaps? regardless, i luv that site, so much legwork already posted.

...that said, i have several of these, and im reasonably determined to complete at least (1) 12N14P wind before resorting to an 12N16P (ABC) wind...please excuse the inevitable ugliness in the interim...

fortunately i have a couple extra stators, parts i will still need to acquire include (4x4x1.5mm) mags and 3.175mm shafts,,tho i may have an alternate source for shafts.

as always, all comments/criticism's welcome and appreciated
Posted by silentsurfer | Feb 01, 2009 @ 07:43 PM | 7,048 Views
this is your basic GBx single, from parts garnered from DonA,
it was chopped down from a GB triple fluxring (i will likely never,
EVER attempt that again) 22.7mm 9-pole GB single stator, 5x5x2mm
StrongRC curvies, cropped GB long shaft,, 20turns 24awg (0.52mm)
Slofly wire, ABC terminated Wye,,, 32.2g AUW

(wattmeter) 1st of 4 quick runs
0.) Io 2s 800 8C venom 0.4A, 7.4v, *(initial test)
1.) Io 2s 1850 20C mega 0.4A, 7.6v,
2.) Io 3s 1320 12C XP 0.4A, 11.4v,
3.) gws8040D 2s1850mega 4.2A, (2sv?) 230g/8.05oz 7470rpm
4.) gws8040D 3s1320XP 6.6A, 10.1v, 385g/13.47oz 9360rpm

E-logger (1st log) in 4 parts (see above)Total time:02:41.75
(2s Io)
08.25 7.73v, 0.55A, 9398rpm
09.50 7.73v, 0.55A, 9469
11.00 7.73v, 0.49A, 9469
13.50 7.73v, 0.55A, 9469

(3s Io)
46.00 11.43v, 0.49A, 13586rpm
48.75 11.40v, 0.49A, 13586
51.25 11.40v, 0.43A, 13297
53.25 11.40v, 0.43A, 13297
56.25 11.40v, 0.43A, 13586

(2s gws8040D) (7470 rpm-globee, 230g-scale)
1:43.00 7.35v, 4.32A, 7530rpm
1:45.25 7.32v, 4.26A, 7440
1:47.75 7.30v, 4.26A, 7485
1:51.25 7.27v, 4.20A, 7485

(3s gws8040D) (9360 rpm-globee, 360-385g-scale)
2:11.00 10.17v, 6.73A, 9541rpm
2:16.00 10.07v, 6.49A, 9469
2:18.75 10.02v, 6.49A, 9469
2:21.00 10.00v, 6.49A, 9469
2:23.50 9.97v, 6.42A, 9398
2:26.50 9.95v, 6.36A, 9398
2:33.00 9.87v, 6.30A, 9328

i cant seem to get more than 14oz thrust out of one of these
@ 6 amps i could probably have dropped a turn tho (and had
originally intended to) next time maybe/?.....
Posted by silentsurfer | Jan 07, 2009 @ 09:00 PM | 7,395 Views
this is basically another 'Superkit' like those sold by Don at StrongRC, except it wasnt purchased as such, i simply pieced it together from surplus parts ive recently accumilated, based on the overall parameters of an earlier kit from him.

man theres some Nice Deals comin outta that place!
While i dont really think he's totally moving on, i cant help but have some anxiety about one of our original, long standing, caring, knowledgable, and giving-est contributers here on the motor forums, and in the diy brushless world in general, possibly packin it in!? it would be a Huge loss.
and i have (already in my short term dabble into RC) seen at least a couple of our favorite online suppliers go the wayside

anyway, it was a bit of a struggle, but we have here 20 turns
of 24awg, on a single 22.7 9-pole stator, wound ABC terminated Wye. its basically a CDRom motor i guess, with 5x5x1mm curvies, and the can with 'light weight hub' for extra support of the shaft.

...first chance, I'll fire her up and see how she compares to my previous build.
...this new temp. position at work is kinda kickin my butt!
but by this weekend for sure,,
tnx for peekin in