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Nov 10, 2005, 06:12 PM
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FAQ

EHBG/Electric Helicopter Beginner's Guide version 16 *** UPDATE 11-10-05 ***


.

Version 16 of the Electric Helicopter Beginner's Guide (EHBG) is now on the website.



Please read this if you are new to helicopters or new to electric helicopters.
It covers choosing an electric helicopter, various construction tips, choosing a motor, ESC, etc.


New for this version:
  • Expanded glossary
  • Expanded glossary
  • Larger pinion list
  • More BEC info
  • Other additions/changes too numerous to list.
The PDF version is currently at:
http://ehbg.rchomepage.com
Look for the file "ehbg-16-pdf.zip"
Many thanks to Mark Pearson (MRP) for all of the hard work including all of the new glossary and flight sim additions, pics, etc.

Also see MRP's website (http://www.swashplate.co.uk) for the full list of EHBG formats, including the HTML, compiled help, and A4 paper versions.

Toshi
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Nov 10, 2005, 06:14 PM
Registered User
EddieNewYork's Avatar
Thanks Toshi! Thanks Mark!
Nov 12, 2005, 09:40 AM
Registered User
bobgo's Avatar

EHBG is great! BUT....


When its updated could the writer please make a posting of the Chapter or pages that are updated? Friday afternoon I finished printing out what was the current version. Friday night it was updated. I don't know about anyone else here but I would find it most helpful just to replace a chapter or section of pages. Ok, we know the glossary was updated, so that much won't be a problem but what else specifically? Not trying to bust ya here, you do a great job. It would just be better for those who only need an update. I'm new to the forum and to flying, (in fact my heli still hasn't arrived) so I hope someone hasn't already addressed this and if they did please be kind enough to point me to where I could update without a whole new manual.
Nov 12, 2005, 04:59 PM
Registered User
Uh...There were minor changes all over.

This is about 15% of the changes. If you really want, I can post the rest.

Toshi


Section 2.2:

New helicopter, add after "Ikarus ECO 16":

Ikarus Viper 70/MS Composit Stinger 3

o Moderate to serious aerobatics capable

o Moderately inexpensive (retail ahout $250)

o About average durability

o Manufacturer in Germany

o 700-900 grams AUW, 750mm rotor diameter, 3-5s lipo

o small, high headspeed, difficult to learn hovering

o backyard flyer


New section after 5.6.1 For the ECO 16:

For the Viper 70:

o Mega RCn 400/15/5 (brushless, 3s lipo, 17T)
o Mega ACn 16/15/4 (brushless, 3s lipo, 10-12T)


Section 5.13: BEC

After "Some controllers will handle up to 10 volts..." add new
paragraph:

To use an external BEC, you will need either a free servo/battery
position
on your receiver or a Y-lead for the BEC's output power plug.

Change this paragraph:

"Another new switching BEC is the ParkBEC by Dimension Engineering.
This
BEC is rated for 1.25 amps continuous and can handle up to 33 volts of
input."

To:

Dimension Engineering manufactures to BECs which are usable for
helicopters: the ParkBEC and the DE-SW050. The ParkBEC is rated for
1.25
amps and 33 volts of input and includes a built-in Y-lead. The DE-SW050
is
rated for 1 amp and 30 volts of input and requires some extra soldering
to
use. Both the ParkBECs and the DE-SW050s can be wired in parallel to
increase the current capacity of the units.


Section 5.14: Batteries:

Change:

"...by slow charging them at C/20 for 24 hours."

to:

"...by slow charging them at a constant current of C/20 for 24 hours."


Section 6.11 Portable Generators:

After the paragraph starting "Honda manufactures..." add new paragraph:

"Yamaha manufactures the EF1000iS which is rated for 1000 watts of
output, and is also a very quiet (47-57db) generator."


Section 9.12 Threadlock:

Change:

Do not use threadlock on metal-to-plastic or plastic-to-plastic areas.

To:

Do not use threadlock on:

o metal-to-plastic areas
o plastic-to-plastic areas
o setscrews (will become nearly impossible to remove)
o bearings


Chapter 40:

After "Ikarus ECO 8/16" add new section:

"Viper 70/90

o (US) http://www.fxaeromodels.com
o (US) http://www.3dhobbyshop.com"


In "Batteries and related supplies" after www.cheapbatterypacks.com
add:

o (US) www.battlepacks.com

I would recommend sorting the "Helicopter Size Summary" table by AUW
from
lightest to heaviest to make it easier to compare helicopters.

Section 5.4 Swashplate (cyclic) servos, page 24:

After "Torque, speed, and precision should be..."

add:

"Note: All servos controlling the swashplate MUST be the same type. Do
not
mix servo types otherwise cyclic control will be erratic."

Section 5.13, page 45:

After the paragraph starting:

"If you use a one amp BEC with digital servos..."

insert a new section:

"General recommendation:

Helis using micro servos (HS-55/56 size): ParkBEC
Helis using mini servos (HS-81/85 size): SBEC
Helis using full-sized servos: UBEC"

After the paragraph starting:

"If you use a one amp BEC with digital servos,..."

Insert two new paragraphs:

"To use the ParkBEC with an ESC with a built-in BEC, the throttle wire
should be plugged into the ParkBEC header and not the receiver. This
will
automatically disable the ESC's built-in BEC.

To use the ParkBEC with an ESC without a built-in BEC, then both the
ParkBEC and ESC must be plugged into the receiver (using a Y-lead if
necessary). If the ESC is plugged into the ParkBEC, then the ESC will
not
receiver 5 volt power and will not initialize."

Change the paragraph:

"To use an external BEC..."

to:

"To use a (non-ParkBEC) external BEC..."

Add a new section "Revo mixing" between 5.12 Tail motor ESC and 5.13
BEC:

"If a transmitter without revo mixing capability is used with a yaw
rate
gyro, then some sort of revo mixing capability is required on the heli.

Some heli motor controllers such as the Piccoboard, TREC, and 3-in-1
boards include revo mixing capability.

Dionysus Designs also manufactures a separate revo mixing board which
allows the use of both brushed and brushless main and tail motor ESCs."

Section 38, bent shaft checking

Change:

"To check for bent shafts, irst..."

to

"To check for bent shafts, first..."

Section 5.7.3.1, HPI Racing Micro RS4 steel pinions w/ss

Please remove the old 8T-13T list and use this list instead:

old 8T: 48005
old 9T: 48006
old 10T: 48007
old 11T: 48009
old 12T: 48010
old 13T: 48010
old 14T: 48011

new 9T: 48050
new 10T: 48051
new 11T: 48052
new 12T: 48053
new 13T: 48054
new 14T: 48055
new 15T: 48056
new 16T: 48057

Add these new pinion lists. Please sort the entire pinion list by bore
size, from 2mm up to 5mm (after adding new lists)

GPM Racing Titanium pinions w/ss (3.17mm bore, 0.5 module)

Note: -B pinions are blue, -S are silver

11T (MH011TT-B, -S)
12T (MH012TT-B, -S)
13T (MH013TT-B, -S)
14T (MH014TT-S)
15T (MH015TT-B)

Team Integy pinions w/ss (2mm bore, 0.5 module)

8T, 9T, 10T (T4027)
11T, 12T, 13T, 14T (T4023)

Trinity pinions w/ss (2mm bore, 0.5 module)

9T, 10T, 11T, 12T (34066)
13T, 14T, 15T, 16T (34067)

Stock Drive Products pinions w/ss (5mm bore, 0.5 module)

25T: S10T05M025S0505
26T: S10T05M026S0505
28T: S10T05M028S0505
32T: S10T05M032S0505
36T: S10T05M036S0505
...

Stock Drive Products pinions w/ss (3mm bore, 0.5 module)

12T: A 1Y 2MY05012
15T: A 1Y 2MY05015
16T: A 1Y 2MY05016

Chapter 10, "Post-Construction/ARF Checklist"

After "Try to route wires to/from electrically noisy..."

Add:

"Do not coil excess wire. These coils of wire will act as an antenna
and
will amplify the generated or received electrical noise. Bundle the
wire
in an S-pattern instead."

Section 9.1.2 Threadlock:

At the end add:

"To disassemble loctited parts, apply heat of over 100C/212F. This
should
soften the loctite enough to remove the parts."

Section 5.6.6 Cooling options:

For 20mm heatsink, add: Sparrow Products 20mm heatsink

For 28mm heatsink, add: Sparrow Products 28mm heatsink

Section 5.3: Tail (rudder) servo:

In the list "For the Corona, Logo 10, ECO..."

Append this servo:

"Hobby Electonics HDS-577 (DS mode compat)"

Section 3.2.2 Logo 10 - brushles

Change "3 HS-85s for cyclic" to "3 HS-85MGs for cyclic".

Change "HS-81 for tail" to "HS-5245MG for tail"

Glossary changes:

Many of the new definitions are much too verbose, I think.
I've taken the liberty of changing many of them.

Also, there's too many terms explained in multiple places, which is not
good. EPA and ATV are the same, but have separate definitions.

You should avoid using the word "you" in the glossary, as it's less
professional.

Please avoid phrases such as "This is a" or "such that" because these
are
redundant phrases.

Some terms should reference back into the EHBG sections for a more
detailed explanation instead of trying to include the explanation
inline
in the glossary.

Let's change the chapter name from "Terminology" to "Glossary" since it
has become a glossary anyway.

Anyway, here are the changes:

3D flying: I don't like the new changes...let's just change it back to
"A
maneuver which requires the constant harmonized input..."

Aileron: change to "airplane equivalent of left/right cyclic"

Airfoil: Change "Different airfoils can favor..." to "Different
airfoils
may be better for..."

ARF or ARTF: Change to "A pre-built helicopter which only requires
installation of electronics."

ATV: Add "See also EPA."

Backlash: there is a typo - change "ammount" to "amount"

Base Load Antenna: The correct term for this is "Base-loaded antenna".

Binding: run-on sentence: change "excessive current, can ruin a servo
with
time." to "excessive current and will eventually destroy the servo
motor."

Boom Strike: change "This is also one of the most common events
experienced...into the ground." to "This is a frequent mistake made by
beginners."

Brain Fade: let's remove the "This can happen...comfortable at
flying." sentence, as it should be apparent that mental lapses are
random
events.

Carbon Fiber: change to "A carbon composite material usually used for
rotor blades, helicopter frames, tail booms, and other areas where high
strength and light weight are required."

Channels: remove "helicopters often need to mix...etc" because mixing
is a
separate issue.

Drag: change to "The friction of a moving object against the air."

Electronic mixing: change "See also CCPM" to "See also CCPM and eCCPM."

EPA: Change to "EndPoint Adjustment. This is the same as ATV. See ATV."

Dual conversion: current definition is too complicated. Change to "A
type
of receiver which converts the incoming frequency through two
intermediate
stages. This type of receiver rejects interference better than
single-conversion receivers, but with a size and weight penalty. This
type
of receiver uses a different crystal than single-conversion receivers."

Elevator: change to "airplane equivalent of fore/aft cyclic."

Exponential: change to "A programmable nonlinear response curve
associated
with a particular transmitter control. This allows either less or more
sensitivity near the center of a transmitter joystick. Often useful for
beginners to allow better control of helicopter movement."

Failsafe: change to "A default setting for a receiver channel to be
used
when the transmitter signal is lost, usually associated with PCM
receivers. This is useful for airplanes to allow the model to glide
when
the signal is lost, but is less useful for helicopters."

Fixed Pitch: change to "Usually refers to a helicopter which has rotor
blades at a fixed pitch, and climbs and descends by changing the speed
of
the main rotor blades. This type of helicopter is more durable and
easier
to maintain but have some disadvantages such as more sluggish altitude
changes and the inability to perform autorotations."

Flapping: change to "See How Helicopters Work: The Rotorhead section."

Flare: change to "The end of an autorotation maneuver eliminates the
forward motion of the helicopter."

Gain: change to "Gyro sensitivity to motion. See also the How Gyros
Work
section."

Gyroscopic precession: change to "A tendency of a rotating body to
translate an external force into a a new force occuring 90 dgrees later
in
its rotation." ... I'm not really sure we should have this definition
in
the EHBG because we don't need it.

Idle-up mode: change the entire third paragraph to "This feature can be
used to lock the throttle to a specified value so the throttle stick
only
controls the collective pitch, which is required for inverted flight."

Jesus bolt: This definition is wrong, really - there is only one Jesus
bolt. This term originally came from "Jesus nut"...try looking up
"Jesus
nut" in the Wikipedia. Please change entire definition to "The bolt
which
holds the rotor head onto the main rotor shaft."

Micro helicopter: change "400 grams" to "800 grams".

Nose-In: there is mistake...yaw is not reversed...but anyway...remove
the
phrase "A term that describes", and change "roll and yaw" to "roll and
pitch".

Paddle Timing: This is too complicated and should be removed. I think
it
will just confuse people.

PCM/PPM: Let's split into two definitions: PCM and PPM

"PCM: "Pulse Code Modulation. A generic term for digitally
encoded data."

"PPM: same as FM. An analog form of encoding data."

Pirouette: this has a stutter. Change "around the main mast around the
main mast" into just "around the main mast".

Retreating blade stall: you are confusing "loose" and
"lose". "loose" means "not tight" and "lose" is the opposite of
"win". Change to "A situation in forward flight where the effective
airspeed
of the retreating blade approaches zero. This can result in loss of
helicopter control."

Rudder: change to "On an airplane, the vertically hinged plate which
controls the course of the airplane. This is equivalent to a
helicopter's
tail rotor."

Rudder Offset: Remove leading words "This is". Remove word "you're".

Settling with Power: change to "A dangerous condition when descending
during a hover where the helicopter's rotor blades descend into their
own
downwash. This can cause a crash if not handled properly. Model
helicopters have a better power-to-weight ratio than real helicopters,
so
this is usually not a huge problem, however, it does occur."

Stabilizers: change to "Small plates affixed to a helicopter's tail to
force the tail to weathervane and improve forward flight
characteristics. Helicopters usually have a vertical stabilizer (to
prevent the tail rotor from touching the ground) and may have a
horizontal
stabilizer. Aerobatic models will often have stabilizers with cutouts
to
reduce the weathervaning effect."

Sub-trim: Change to "An auxiliary trim adjustment on many transmitter
models which allows trim of controls with the joystick trim centered.
This
allows full trim adjustment while flying."

Threadlock: change "See also Loctite" to "See Loctite".

Throttle Hold: change to "A switch used to force a zero throttle
setting
regardless of the throttle stick position or idle-up switch position.
This
is useful as a safety feature when connecting or disconnecting the
battery
and also to quickly kill the motor when a helicopter crash is
imminent."

Throw a blade: "Throw a blade" usually refers to a blade being thrown
without the blade grip in the nitro world. It's only in the micro world
where blade grips are also thrown, due to abysmally poor quality rotor
heads...but anyway...change to "A slang term describing a main rotor
blade
detaching from the rotor head and being flung at high speed. This is
very,
very dangerous."

Torque: Please remove...this word is not specific to R/C helis and is
in
every standard dictionary.

Trickle Charge: usually this is C/20...please change to "A charge rate
of
C/20. This is a safe level for continuous charging of NiCd cells. Cells
of
other types, such as NiMH and Lipo should NOT be trickle charged."

Tracking: Change to "The path of a rotor blade as it spins. See also
the
Helicopter and Transmitter Setup: Blade tracking section"

Training Gear: Change to "A larger landing gear which reduces the
chance
of landing at an angle. These are used by beginners when leearning to
hover, and are typically made of two crossed sticks
with whiffle balls on each end."
Nov 12, 2005, 08:44 PM
Registered User
bobgo's Avatar
Wow Toshi, that was quite a lot of changes just to be 15% of what was added. I commend you for the effort you put forth to address my concern. I really would like to see future versions set up more as updates to the manual if you are following my logic though. (replace page 32 with page 32a) or add chapter xx sort of thing. That would seem to be less time consuming than rewriting (or reprinting)the whole thing. Still, hats off to you--best guide I've ever seen.
Nov 12, 2005, 09:42 PM
Registered User
Quote:
Originally Posted by bobgo
Wow Toshi, that was quite a lot of changes just to be 15% of what was added. I commend you for the effort you put forth to address my concern. I really would like to see future versions set up more as updates to the manual if you are following my logic though. (replace page 32 with page 32a) or add chapter xx sort of thing. That would seem to be less time consuming than rewriting (or reprinting)the whole thing. Still, hats off to you--best guide I've ever seen.
Thanks!

There's too many changes to be just page replacement. We tend to reorganize sections to keep them manageable as the sections become larger.

You may want to keep an older version around for a quick reference, then keep just the electronic copy of the newest version around for a more detailed reference. This would probably be the best compromise to save paper.

Toshi
Nov 26, 2005, 10:36 AM
John
I have only just printed this excellent article on my inkjet...

I was looking for a 'crying' icon, but please do NOT take my remarks wrongly. I really appreciate the time and effort you guys have put in to making this excellent reference BOOK.

Well done,
John
Dec 10, 2005, 11:10 PM
Registered User
Clarification on pitch curve setup here:

https://www.rcgroups.com/forums/showthread.php?t=451274

Toshi
Dec 17, 2005, 04:46 PM
Administrator
jbourke's Avatar
I've "unsticking" the thread by request of the thread starter, TMorita.

Jim
Dec 17, 2005, 04:52 PM
Its all fun
Tonystott's Avatar
Which is a real shame, as the forum will be even further filled with repetitive questions from newbies, with no simple direction to send them to gain a huge amount of knowledge to help them up the learning curve.

Toshi, can you at least post the link to the other website where you have the EHBG, so it can be saved and quoted?

Thanks
Dec 17, 2005, 05:14 PM
Old new guy
TheX's Avatar
I've uploaded the .pdf and .chm version to one of my websites. Links available by PM.
Dec 18, 2005, 01:27 PM
MRP
MRP
Heli Nut
MRP's Avatar
Quote:
Originally Posted by Tonystott
Which is a real shame, as the forum will be even further filled with repetitive questions from newbies, with no simple direction to send them to gain a huge amount of knowledge to help them up the learning curve.

Toshi, can you at least post the link to the other website where you have the EHBG, so it can be saved and quoted?

Thanks
Well that was the reason it was put together in the first place...

With Toshi's permission all the available formats are posted at:

www.swashplate.co.uk/html/ehbg.html
Dec 19, 2005, 04:32 AM
Registered User
Minimole's Avatar
Quote:
Originally Posted by jbourke
I've "unsticking" the thread by request of the thread starter, TMorita.

Jim
What?!?!

Sorry, but thats just stupid IMHO.

A few people said that they were fed up of the 'look in the EHBG' reply to questions. Why? I think its cos they are lazy, and want others to do the work for them. Toshis even often sent the link to the actual chapter that had the answer...

Duane.
Dec 19, 2005, 05:07 AM
John
Surely it is only right to respect the authors wishes, but as a new member to this excellent forum, I feel it sad that this excellent article is not where it justifiably belongs?

I have printed it off and appreciate all the very hard work that went into compiling it.

THANKS again,
John
Dec 19, 2005, 08:19 PM
Administrator
jbourke's Avatar
re-sticking the thread at the thread starters request.

Jim


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