A memory revived for me too on this thread.
As a young boy in Fairbanks Alaska, my pals and I
made super-crude sort of U-C planes from
corrugated cardboard and wood scraps. Over one
summer, we took them through three levels of
complexity. The first were simply cardboard
planforms roughly modeled
I asked a servo travel question recently, namely
Is there a standard total travel, in degrees of
rotation, for servos being driven by a
non-computer radio, or a computer radio with
travel set on default (100%)
Thanks to all those who replied.
Unfortunately, the replies were all over the
place,
The
point you make about seperating controls with seperate functions is an
interesting one, but becomes hazy in the realm of aircraft
control.In an aircraft, the
simple 'single' intentto execute a level turn requires control inputs from
elevator, rudder, and ailerons, every time, no
Sounds like a very manageable slope.
Yes you can probably fly halfway up successfully.
Two thirds might be better.
Slope landings are basically done across the
slope, as close to into the wind as you can get
without flying away from the slope.
If the lift is strong, you have to start out down
I'm with the school that says if we can only have
it one way, then end plugs are the way, hands
down. I'm somewhat bummed to learn that the M5 is
not this way.
I build things with the RX often in the wing, or
in a VERY small pod, and here, a little length due
to the added connectors is almost
Carl,
Please get in touch with a confirmation of payment
and address for the sloper kit.
NO problem if you've decided against the sale.
Just let me know so I can put it back on the
market. I'm giving our deal until Monday before I
cancel and put it up for sale again.
Thanks,
Lift,
Scobie in
1- EPP'ee Sloper Combat Foamie Kit... $39 plus
shipping
see:
http://www.srhobbies.com/page2.html
scroll down to EPP'ee for photo and description
Virtually NIB kit.
Notes:
Box looks terrible, perhaps not original but
contents are all there, and totally fine. Box will
be reinforced seriously by
Sorry, I have only the EPP'ee sloper kit still for
sale,
No servos, batteries, or hi-starts.
Lift,
Scobie in Seattle
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1- EPP'ee Sloper Combat Foamie Kit... $39 plus
shipping
see:
http://www.srhobbies.com/page2.html
scroll down to EPP'ee for photo and description
Virtually NIB kit.
Notes:
Box looks terrible, perhaps not original but
contents are all there, and totally fine. Box will
be reinforced seriously by
The Walkalong glider was originally invented by
Paul McCready's sons, Tyler and Parker, (maybe
with some guidance from dad?) hanging around in
their dad's hangar in the years of the Gossamer
Albatross development. I got the full story of the
original invention from Parker McCready a few
years
One thought that favors having SOME contrast
between tops and bottoms or SOME assymetry in a
glider color scheme is that with ALL black, even
if it's very visible, it seems that you run the
risk at high altitudes/distances of the 'image
reversal' problem in which a silhouette-only image
can be
I have a perfectly good monitor, and cannot see
what you're referring to Harley. The photo I get
to from this link:
http://www.hitecrcd.com/Newproducts/5125.htm
shows me a view of the servo from an angle that
wouldn't show set screws even if they were there,
only the arm surface that has the main
www.tgworks.com
has some ohmark mixers, I believe.
Lift,
Scobie
used to sell a slick electronic mixer that had a dip switch to
allow for setting different percentages of mixing aileron and
elevator in an
elevon set up.
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What sort of numbers would these even be?
These would be the sort of 'numbers' that make really trippy conversions
into the Wingdings font.
Nothing more.
Lift,
Scobie.
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I was
flying my smallcessna just yesterday afternoon, thinking what a priviledge
it is.
Today,
the entire nation's air traffic is grounded.
John
Roe was saying he wished the world was a different place.
I
couldn't agree more.
After
today, it will be a different place, of course, but not
What are the tolerances for calling something scale?
As much as it would be nice to have a reasonable standard for this, or
'tolerances' as you say, I'm pretty sure the real answer is that there is
none. It's more of a what-can-we-get-away-with
while-making-the-various-compromises kind of
Thanks for posting this follow up, Jim.
I agree that the single point method is a really good idea, especially for
any extreme taper.
I had totally forgotten that with your type of system, the pull points
(clips) are ALSO the power points, meaning that a shorter span between clips
means less
In the next few weeks, I'll be flying my small taildragger down the Oregon
Coast for a few days at Manzanita beach with my wife. Wondering if anyone's
doing any interesting flying anywhere nearby there on the Oregon coast,
especially anywhere near any little coastal airports ( ;) ). What's the
I'm
not familiar with this particular model, but I've flown and designed both
wingeron and pitcheron slopers. If it's a wingeron plane where the wings act
like ailerons, and there is still a separate elevator in back, you don't need a
mixer at all. If it's a pitcheron plane where the wings
Micro balloons are spherically shaped silica hollow 'beads' that are so
small they appear as simply white powder. Because they are hollow, they are
very light. They are used as a lightweight filler for epoxy, to make a paste
for creating fillets or other epoxy 'fill' applications. The resultant
For the aerodynamics heads out there here is some fascinating research from
Stemme, the company that makes one of the more amazing motorgliders in the
world. They are looking into reproducing the stall-mellowing effects of
having self-actuated, top surface, partially porous flaps that mimick the
As you can see from the message below posted by MSu1049321, (What an
interesting name, it's even more unusual than mine... What WERE his folks
thinking?) it's really helpful for a lot of the population on this list if
you send your messages to the exchange in the simple text-only format called
For those who are nervous about opening attachments, I have copied the text
from the letter recently posted from the German Aero Club. Seems like a
worthwhile commentary on the whole towing thread that's been raging on the
exchange. Wouldn't want someone to miss it just 'cause they don't want to
They also make small r/c helicopters,
container trucks, gyro flying saucers...but unforturnately no
airplane!
Raymond Wong
Hong Kong
They make micro RC copters that actually FLY? How small?
A pal of mine recently got a batch of used RC gear for free and is sorting
through it. I'm playing the role of mentoring him into the hobby, mostly
glider, maybe a little electric.
Included in this rather nice haul of planes and gear is a JR X-388S radio,
not used in at least a year.
1)Anyone
I've been using the kynar wire wrap wire for antenna replacements for at
least half a year with no problems. Don't know that it's aluminum...or
not... but it works for me.
Lift,
Scobie in Seattle
I ran down to Radio Shack looking for wire and ended up buying some 30AWG
wire wrap wire...it's
Martin writes:
Do you know of a reasonably priced/functional bagging system?
I refer you to my article on the CRRC website on super-inexpensive vacuum
bagging. This system offers great control, utter simplicity, and the lowest
cost of any system I've seen or heard of. It does require being
Ok, gliderland,
There may in fact be SOME legitimate safety concerns with discus launching,
and it is very much worth rationally thinking about what they might be, and
how or whether to address them in the competition environment. For a while
there it looked like no one was going to even bother
Paul Naton made some great points in his recent and provocative HLG post
that deserve a resultant thread that doesn't deteriorate into an
us-vs.-them-its-all-about-danger-liability-and-other-bad-things mentality:
Anyone up for serious consideration of completely NEW modes of hlg
competition
Dave writes:
I have heard of the javelin style throw and base on knowing what
that means
for a real javelin, I am not clear how it is applied to a HLG.
Hlg terminology is very new language, and as such is in flux. From studying
the hlg terminology usage to date, I would conclude that
Brian writes
A
parson who is using a high start can only achieve the
energy of the Pinnacle...
Imagine the energy a fully ordained priest or even a cardinal could achieve!
The Pope could probably get his glider in orbit.
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I'm working with some talented youngsters on aerodynamics and glider design
and am having a hard time explaining exactly WHY elliptical lift
distribution (and the resulting elliptical planform) is a theoretical ideal.
Does anyone have a great simple way of thinking about it?
Good modes of
The one apprehension I have about "antenna connectors" (as
opposed to a solid, soldered wire)
is that a bad or loose connection could result in signal loss and
a lost plane.
This sort of makes sense, and I ran into the same concern when I was rigging
a plane this way. However, if you use a
Walter,
While I haven't done exactly what you're describing,
in my latest HLG design efforts, I have had some success building planes
that are 'pre balanced', meaning that the weight of each component(tail boom
and surfaces, wing, pod, servo, rx, battery, etc.) is either calculated or
measured
I really like my Ohaus triple beam gram balance. Good weight range, and
great accuracy, simple to use, and no digital or electric anything. Yes I am
one of those weight freaks that counts every gram, but before you consign me
to the padded room, consider that I design and build very small planes
Responding to my use of non-rechargeable lithium cells as onboard power, Jim
wrote:
1. I think the reason many of us use rechargeable cells is for cost
consideration. Maybe it is cheaper to just reuse the same ones.
But buying
chargers, etc. costs money too, in fact, it is more expensive
Also a very real consideration. Thanks YK.
I chose rechargeable not by cost reason but by environment reason.
YK
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-Original Message-
From: Scobie Puchtler or Sarah Felstiner [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, July 19, 2000 8:19 AM
To: Richard Ida
Subject: RE: [RCSE] 1st time sloper
If you know how to handle your Stratus in a bit of wind, you should have NO
problem sloping your local dam
Human ability to percieve distance is largely a learned skill, and as with
most 'seeing' tasks, we rarely realize how subject to error it may be. While
distance estimates may be good in a certain environment, with certain kinds
of visual cues, it is no surprise that when trying to estimate the
By the way, I didn't write the paragraph below, but due to strange reply
editing, it looks as if I signed it "Scobie". I'm perfectly aware that three
cells can be made to work. I do use lithium camera cells instead, though, as
many of you know, because I hate charging when flying, love the
I
know not to trust the cheap stuff in the silver and
(purple/yellow/brown)
bottles to be fuelproof. I can't name a brand because it seems like every
hobby store I go to has their own name on the bottles - some sort of deal
with the manufacturer, kind of like personalized pencils I
Jeff wrote:
Been hearing more and more about this new launch method for HLG's.
Good. It's a cool method that deserves some real attention for several
reasons:
1) If the plane is properly designed to take it, launch heights ARE quite
amazing.
2) Even if you don't compete, and just like to
James recently wrote asking about hats and sun protection esp. with regards
to preventing skin cancer.
Among full scale guys, the hat of choice is often a floppy tennis hat that
has a constant, downward sloped soft brim, but keep in mind that they have
different problems from us. They are jammed
Okay, so this Maxx Products Inc. company imports some nice litte servos,
their little MX-30's which are a very viable alternative to HS-50's, and
thinner if you like to put 'em in wings. and they distribute Hitec stuff, I
guess, too.
Now, they also import an rx, single conversion, competitor to
I have come to need the classic compression utility PKZIP, to unzip soaring
related (!) and other files.
I got all brave (for me) and went to a utilities site a while back and
figured it all out, downloaded the program, and thought I was all set.
Turns out the program came to me in a .zip
Pink and blue foam are produced with some surface tension in the skin-like
layer on the top and bottom surfaces. If you spraymount down a block of pink
foam and cut a layer off the top using your hotwire, that layer will curl to
some extent almost every time. Generally the thinner that first cut
Tom wrote:
every time I
send e-mail to Don and Joe, the spell checker wants to replace "Aerotech"
with "erotica."
My full name is Scobie Puchtler, and the same program creates reply emails
to me with my name
'corrected'.. the result?. Scabby Putter, of course. Howzat?
Lift,
Scabby
I need the benefit of those with experience building ailerons/flaps into the
lightest bagged wings. I'd like to cut the surfaces after bagging and have a
hinge already incorporated into the layup. What weight of what stuff do I
put in to give me a hinge 'layer' in a light hlg-type layup? light
just a few comments about the airlines and big luggage. They ARE ALL
inconsistent from airport to airport skycap to skycap. It all seems to
depend on who's cracking down about what and where. This makes the whole
oversize baggage thing a real sport, complete with gambling, so I was not
surprised
My understanding is that your two goals are incompatible. In professional
composite construction, microballoon filler is not generally relied upon to
add any strength. It is used because it thickens the epoxy well and if
enough is used it can be quite light, and it sands fairly easily compared
Gordy wrote:
One good thing about Rays and mine, we were both high on
sailplanes when it
happened!
You were flying a sailplane when you cut your finger off with a radial arm
saw!?
Wow. Building and flying at the same time... what is that.. like LSF-10?
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There has got to be more to it than just ground or surface effect. Swallows
use significant anhedral for ANY non flapping glide, ESPECIALLY when
circling in thermal lift or making a pass in front of a lifty slope. For
them it is clearly 'best glide', and they always use it to some degree when
not
I'm curious to know what the wingloading is on one of Nathans "light
version" Boomerangs, just for a light-48"-slope-wing reference point.
Thanks for info.
Lift,
Scobie in Seattle
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Go Bill Swingle!
Nice idea!
I like it!
And if you're really in a hurry, just jam the pencils into a scrap slab of
blue foam and balance away!
Drill two holes near the middle of the 12 inch piece that will
fit the pencils
snuggly. Separate the holes by a distance approximately 1 inch
wider
I want to know about this too, and how to make it work, because I tried it
and my failure made me very wary of trying it again. I've now had great
success with (admittedly harder to make) formica templates, but the
sheet-metal-scissors route is still tempting if it can really be made to
work
This translates into wider kerf at the "slow" end.
With that said, I'm not real sure but that "gravity-powered"
cutters have the
same problem.
They do have the same problem. It is especially well illustrated when
cutting wings for a delta in which the root may be twice the tip chord or
Though this question runs the risk of further exposing my radio-idiot
status, I'll ask it anyway, in the hopes that the answers will improve said
status instead of worsening it!
So let's say that by using huge servo arms and tiny control horns, you set
up your plane with huge throws. I mean
Okay, everyone, I got the antenna length (Boy, did I ever get it!), though
probably you all should keep measuring your antennas and keep on posting,
cause I only have about twenty replies so far, and I'd really like to do a
statistical averaging of all the Hitec rx's on the exchange. I'll plot
Hi, entire group!
I am looking to set up a buddy with a flying wing. I have the kit, servos,
rx, etc., but I need a TX that can handle exponential as well as basic
mixing (elevon). And I want to pay minimum to get these basic features. The
TX needs to have a nicad pack and slow charger to be
Actually, I started out cutting them with a rigging axe, and refined my
method by switching over to Stihl!
You must be one of those 'sloper' guys I hear so much about. What do you use
for wing spars? GlueLams? or do you go straight for the Old Growth Doug Firs
with the nice taper?
Scob.
In reaction to a submission about a landsailer that could make speeds of
120mph, Tracy recently wrote:
In a 120mph wind? Where do they find such wind with flat land to
race on that
isn't covered in dunes?
While 120mph is extreme speed for any sailcraft, it would not require winds
of 120mph.
Mark, tried this as a reply direct to you, but it got bounced... so here it
is on the exchange:
Well, if you're coming from California... then no, there are no slope sites
in Seattle.
But there are slope-like options for flying. In a south blow, Gasworks park
has a little speed-bump of a hill
I am finally getting around to setting up my own weight driven foamcutter
system, and I would like opinions about a few key details. I don't mind
getting referred to online drawings and such, but I have seen most of them,
and am now looking more for multiple opinions and solutions to particular
Even the thinnest formica laminates will be very heavy compared with other
methods.
The countertop laminates are engineered for toughness in terms of scratch
resistance, surface hardness, etc. and are specifically NOT engineered for
stress and bending loads, or particularly for tension or
Even the thinnest formica laminates will be very heavy compared with other
methods.
The countertop laminates are engineered for toughness in terms of scratch
resistance, surface hardness, etc. and are specifically NOT engineered for
stress and bending loads, or particularly for tension or
JPA wrote:
I've been very happy with the performance of the HS-50s on the stuff I've
flown. The one thing that I didn't like on the HS-50s was the lack of
control horns. They come with only one.
Really? I could have sworn mine came with a nice collection of horns, albeit
the miniature kind.
Okay, I've got the winter building bug, and this time I'm hotwired and
dangerous. I need the best source for EPP foam in small to medium
quantities. Thanks in advance for any help.
Lift,
Scobie in Seattle
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"RED" of Red Herring fame recently updated his website and now with just a
few clicks of your mouse, you can see the "angry fish" graphics on my
all-EPP Red Herring! (I know you've been waiting with baited breath to see
it... and nothing in life has held any meaning during the agony of your
I think this is great, actually. It opens up a whole line of thought on
aircraft interface design. Bravo. I might have to try it.
Ambitexterous Lift,
Scobie in Seattle.
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Cliff Lindgren writes:
I'm curious to know if there is any difference in the quality (strength)
of 5 minute epoxies..Please give me reasons for your choice in this
matter.
Cliff,
I buy the stuff from an epoxy supplier (mostly to the boatbuilding trade)
here in Seattle called SYSTEM THREE
What might I use as a filler on a foam wing that is as LIGHT as possible,
has some strength, but still truly 'shape-able', and 'sand-able'??
This wing will be film covered directly over the foam, so I need something
that I can really smooth out well to cover various cavities in the wing
I'm flying into Oakland tomorrow (FRIDAY) for a conference, and may have
some time after I arrive to go sloping (AFTERNOON). What's gonna be working
tomorrow and how do I get there?? The nearer it is to the Oakland airport
and or Mills College, the more likely it is that I'll be able to fly, but
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