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Old 04-25-2008, 07:56 PM   #1
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Hey yall, iam new to Nitro Racing and ive got some questions. First, ive got a Sportwerks Turmoil Pro, and iam looking for a CHEAP radio! Ive been looking at these, are these acceptable?
-Airtronics
Blazer Sport http://www.hobbypeople.net/prdcls/r455991.asp

-Airtronics
MX-A 2ch AM http://www.hobbypeople.net/prdcls/r448991.asp

-Hitec/RCD
Aggressor 3ch FM http://www.hobbypeople.net/prdcls/r755462.asp

Do these come with a RX, and able to "run" the 2 servos?

Also, what % of Nitro and % of oil do i need to buy for racing purposes only?

Thanks
Blake
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Old 04-25-2008, 08:25 PM   #2
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Hitec its FM and 75MHz

30% fuel is the best. Its easier to tune and hold a tune I think. The engine may run a bit hotter but tuning can fix that.
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Old 04-25-2008, 10:33 PM   #3
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look into the airtronics mx3-S, it is FM, 75mghz and Synthisized (no crystals, just use a little dial to change channels)

if you haven't already, also look in to the Spektrum dx2 and dx2.0 series radios. They are a little more expensive, but don't use regular channels (they operate on the 2.4 gig band) and automatically connect on an open channel.. So you never have to worry about being on some one else's.

for fuel, 30% is good. it runs a little cooler then 20% and makes a little more power. Look for 12-14% oil and stick to major brands like Sidewinder, O'Donnell's, and Trinity.
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Old 04-26-2008, 01:30 AM   #4
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Quote:
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Look for 12-14% oil and stick to major brands like Sidewinder, O'Donnell's, and Trinity.
I'm not sure what type of oil is being talked about here... oil for what?
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Old 04-26-2008, 01:37 AM   #5
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The oil is in the fuel. Most manufactuers us between 12%-14% oil in there fuels. Some race fuels are as low as 8%, while some RTR fuels such as traxxas top fuel are 18% oil. Mainly tells you how much oil greasy nasty stuff will be left in your pipe after break-in lol. The higher the oil % the more lubricants get into the motor.
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Old 04-26-2008, 02:11 AM   #6
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Quote:
Originally Posted by wes95_z28 View Post
The oil is in the fuel. Most manufactuers us between 12%-14% oil in there fuels. Some race fuels are as low as 8%, while some RTR fuels such as traxxas top fuel are 18% oil. Mainly tells you how much oil greasy nasty stuff will be left in your pipe after break-in lol. The higher the oil % the more lubricants get into the motor.
I see... so I need to check for the oil percentage on the fuel label?

EDIT: I have a bottle of Sidewinder 30% here, and I don't see the oil percentage noted anywhere on it.
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Old 04-26-2008, 09:09 AM   #7
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for cheep radio's...Screw sprnding even 50-100 on a AM pos.....spend 179 and get a Futaba 3pm 2.4 Overall imo the best radio for the dollar....the Spectrums imo dont feel as nice and dont have the feature's the 3pm does....overall the 3pm is the Best beginner radio out there...and to get into 2.4 for such a low price is a steal.
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Old 04-26-2008, 10:11 AM   #8
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You may want to look at the new Airtronics MX-3FHSS
http://www.amainhobbies.com/product_...ducts_id/16275

The Airtronics MX-3 FHSS is faster than the Spektrum. The Spektrum is 50Hz and the Airtronics is 100Hz (Just like Nomadio). The Spektrum DX models are a old technology and once the Spektrum finds a signal it stays locked on that signal so it is more suceptible to interference or glitching especially if someone is using any 2.4 Ghz device like a cell phone with bluetooth. The Airtronics is pure digital with frequency hopping. The MX-3 FHSS searches for the best signal every couple of seconds. This reduces interference and glitching. Since the Airtronics is a pure digital signal Nomadio is working on a firmware upgrade so you can use the Airtronics receivers with their radios/transmiiters.

The Futaba is analog to digital although it is a little faster than the Spektrum, it is not a pure digital signal.

If you are going to race stay away from the AM radios. If you don't want to dish out the cash for a Nomadio then the Airtronics MX-3 FHSS is the next best thing in my opinion.

As far as Nitro % I would recommend any race blend 30% from O'donnel, Byrons etc. These usually have about 11-14 % oil.
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Last edited by Tree; 04-26-2008 at 11:10 AM.
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Old 04-26-2008, 10:23 AM   #9
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Quote:
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The Futaba is analog to digital although it is a little faster than the Spektrum, it is not a pure digiatl signal. I hope this helps in making your decision for a new radio/transmitter.

so ur claiming the 2.4 Faaast isnt a True Ditigal signal ?
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Old 04-26-2008, 10:28 AM   #10
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That is what I read on another website comparing all the 2.4 Ghz transmitters. It was stated that the Futaba Fasst system is running on 75 Hz and is not a pure digital signal. 100Hz = pure digital (Nomadio and now Airtronics are on 100Hz).

If I can remember and find the site I will post it.
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Last edited by Tree; 04-26-2008 at 10:39 AM.
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Old 04-26-2008, 10:35 AM   #11
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I can't remember the site but I found a discussion on another forum:

Spektrum - 50hz/ ANALOG to Digital RF 10mW output power
Futaba 3PM or 3PKS FASST - 75hz Analog to Digital RF 100mW output power
Airtronics MX3- FHSS - 100hz all Digital 100mW output power
Nomadio - FHDSS and DSSS 100mhz Digital (can talk to spek and airtronics 2.4GHz receivers) 100mW output power

You can read the entire thread yourself. If I find the article again I will post it.

http://www.rcuniverse.com/forum/m_5530473/tm.htm
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Last edited by Tree; 04-26-2008 at 11:07 AM.
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Old 04-26-2008, 02:39 PM   #12
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Those are all great radios, but dont have that kind of money now. And ive got to stick with radios that i can get from Global Hobby since thats were my local shop (Rural RC) gets all there stuff from. From the 3 radios i listed, which ones would you go with?

For the fuel, i believe its manufactured from Sig. Which % should i also get for backyard racing?

Thanks for all the great input guys!
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Old 04-26-2008, 03:15 PM   #13
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If those thre are your only option then I would go with the FM radio. AM are not reliable enough for racing...too much interference and glitching.

If you can, save up some money and buy a 2.4 Ghz radio. No more need for crystals and no more waiting around until the frequency you run on is free. If someone is on your same frequency with the FM radio you won't be able to run your car unless you buy extra crystals.
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