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05-27-2007 06:11 AM  13 years ago
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alien

rrApprentice

Middletown N.Y.

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RPM METER
Hi Every one and good eveing I would like to know what typ of rpm meter to buy . I have seen it in tower hobbies but is that one any good . So were is the best place to get one and what kind . Thank You .
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05-27-2007 07:07 AM  13 years ago
Nightstalker

rrElite Veteran

UK (BEDFORDSHIRE)

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I would recommend the X-Treme Optical Tacho,
very easy to use but you do need someone to use it when your heli is in a hover so no good when your on ur own, but still very good

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05-27-2007 08:24 AM  13 years ago
Gearhead

rrMaster

Vt

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dude,, take that money and buy a governor instead, like the Multigov, you set the head speed you want, and waa-laa no need for a tach, your heli will also fly smoother

Jim
Jim
Buzz Buzz Buzz
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05-27-2007 09:33 AM  13 years ago
The Old Guy

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UK Surrey

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I second nightstalker
I run TJ Revmax on all my helis, fine tune them with Sky Tach
And you can check out what head speed the other guys are running with it.
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05-27-2007 10:44 AM  13 years ago
manicmetal

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Gloucester England

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i have had 3 of those tacho's.....and found them to be unreliable
they only give the right reading with brand new batts
as soon as the power drops off the little motor has to run faster to stop the blades....thus giving a higher head speed the worst was 200rpm out the tacho had been used 5 times 2 separate days 1week apart....i have proved the difference by clocking the same model using various methods.....the only one thats worth the money is the one from miniture aircraft
i hope this helps
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05-27-2007 10:53 AM  13 years ago
The Old Guy

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UK Surrey

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I have to disagree about reliability.
I have two of these units (left one at the field and bought another, old one in the wind & rain for a week then found by a pal, put in a new battery and was still OK)
I have checked them both against each other regulary with equal readings
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05-27-2007 11:03 AM  13 years ago
Nightstalker

rrElite Veteran

UK (BEDFORDSHIRE)

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But also wouldn't still have to spin the same speed to make the blades stop??? if the batts are flat then it would not reach this speed
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05-27-2007 11:16 AM  13 years ago
red_z06

rrProfessor

Dumont, NJ

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DC motor speed and batt condition is irrelavant as long as there is enough juice to turn the wheel enough to stop the blade.

DC motor generates pulse as it turns. This pulse can be used as a crude tach so the display shows correct wheel speed.

I had both tachs from Model Avionics and MA. I use MA unit because it has full window view (slot in a spinning disc) vs a slit (slot in a spinning drum).

Although it is a simple mechanical disc, it give a illusion that it is a LCD shutter.
www.JustinJee.com
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05-27-2007 01:06 PM  13 years ago
RCMed-x

rrVeteran

westpalmbeachflorida usa

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I have a sky tach had for 3 or4 years never had a problem with it just replace batt
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05-27-2007 01:42 PM  13 years ago
tchavei

rrProfessor

Portugal

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I'm with Jim here. If you don't have a governor. Use the money and buy one. Any decent governor will set the rpm as you want i.e. Revlock 20, Multigov and even the gv-1 (cof cof). If you're learning, use the governor to ballpark your normal rpm by briefly turning it on and off. If the engine picks up, you're below the rpm you want, if the engine slows down, you are above. No need for a Skytach.

If you fly alone, the skytach isn't an option anyway.

If what you want isn't set the rpm but really reading what is going on during maneuvers, get an eagletree systems USB logger... cheaper than the skytach and provides acurate data through the whole flight

my 2 cents
Tony

--------------------
"Perfection and patience usually walk side by side..."
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05-27-2007 02:50 PM  13 years ago
manicmetal

rrNovice

Gloucester England

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i guess i had ones from a bad batch then!!!

just my luck
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05-27-2007 03:06 PM  13 years ago
The Old Guy

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UK Surrey

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or maybe 3 manicmetal????
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05-27-2007 04:20 PM  13 years ago
inkspot1967

rrProfessor

Cranston Ri

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ATG GOV
get a ATG GOV no tach needed set it from radio in 5 minites and done best gov out there and only like 98.00
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05-28-2007 04:20 PM  13 years ago
tchavei

rrProfessor

Portugal

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Ok. I'm not going to start a flamewar here but why in earth the ATG? It works with preset ratio gears and if you happen to be one of those 20.000 persons that own a heli which doesn't have the exact gearing you will only get approximate headspeeds.

IMHO a governor purpose is exactly taking out the guesses about headspeeds do its job properly. If I want 1954 rpms on the head, thats what I'm counting with. Not something like: "well, you don't have the exact ratio so your headspeed will be between 1940 and 1980... an optica tach will give me the same info.

I do like CY products and I use his blades and other stuff but the ATG isn't exactly the bang for the buck.

My two cents
Tony

--------------------
"Perfection and patience usually walk side by side..."
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