RunRyder RC
 8  Topic Subscribe
WATCH
 1 page 1536 views POST REPLY
HomeAircraftHelicopterGasser Model RC HelicoptersOther › PUH vs RC
08-10-2012 05:21 PM  5 years agoPost 1
Donnie Baker

rrNovice

Indianapolis

My Posts: All  Forum  Topic

Can somebody explain to me the difference between a PUH and RC style motor?

PM  EMAIL  Attn:RR  Quote
08-10-2012 05:38 PM  5 years agoPost 2
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

My Posts: All  Forum  Topic

RC integral fan,left,PUH uses heli fan and shroud.

Team- unbiased opinion.K.I.S.S principle upheld here

PM  EMAIL  Attn:RR  Quote
08-10-2012 05:44 PM  5 years agoPost 3
Donnie Baker

rrNovice

Indianapolis

My Posts: All  Forum  Topic

Thanks guy.
What are the pros and cons of each?

PM  EMAIL  Attn:RR  Quote
08-10-2012 06:51 PM  5 years agoPost 4
fastflyer20

rrKey Veteran

N. Tonawanda, NY

My Posts: All  Forum  Topic

PUH is lighter and can use a EI ignition if so desired, but it is dependent on the cooling system made by the heli manufacturer.

The RC crank is more robust and easier to balance, cooling is rock solid with the integrated fan and shroud.

Both use the same bores, pistons and timing so power is equal.

IMHO the heli choice is more important than the engine format. I run one of each engine.

PM  EMAIL  Attn:RR  Quote
08-10-2012 06:58 PM  5 years agoPost 5
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

My Posts: All  Forum  Topic

The RC tends to be much more reliable because the fan and shroud are designed for the engine by Zenoah.With the PUH you take pot luck on how good the cooling fan is supplied by the heli manufacturer.The RC is bulkier and Helicopters are designed to take only one engine type or the other,you have to choose which.Rc would be my choice,they tend to be cheaper and easier to source than the PUH.Its up to you at the end of the day.

Team- unbiased opinion.K.I.S.S principle upheld here

PM  EMAIL  Attn:RR  Quote
08-10-2012 07:01 PM  5 years agoPost 6
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

My Posts: All  Forum  Topic

I also have G20,230 PUH and RC types.I think Rc will stand a little more abuse than the PUH,important if you are on a learning curve with gassers,takes a while to get used to them.

Team- unbiased opinion.K.I.S.S principle upheld here

PM  EMAIL  Attn:RR  Quote
08-10-2012 08:06 PM  5 years agoPost 7
Donnie Baker

rrNovice

Indianapolis

My Posts: All  Forum  Topic

That info really helps to clarify things.
Is the RC style restricted to a magneto?
What's involved in the gasser learning curve?

PM  EMAIL  Attn:RR  Quote
08-10-2012 11:42 PM  5 years agoPost 8
jlb

rrApprentice

Mid Michigan

My Posts: All  Forum  Topic

A helicopter is a helicopter is a helicopter. 2 main differences IMHO is #1 learning to tune a gas engine if you have no experience with one. If you're from the nitro world, and have nobody around with with gas heli experience, you might enlist the aide of a planker with gas engine experience. (I know I know ....). The other difference is some decrease in performance due to a heavier machine typically and perhaps lower relative engine power depending on how much you spend for an engine. The current crop of new gassers with larger displacement engines from the top engine builders are very close in performance to the nitro machines so that gap is rapidly closing.

PM  EMAIL  Attn:RR  Quote
08-11-2012 07:32 AM  5 years agoPost 9
kogibankole

rrKey Veteran

albuquerque/ibadan

My Posts: All  Forum  Topic

rc vibrates less

if im not blade bogging youll find me pack puffing

PM  EMAIL  Attn:RR  Quote
08-11-2012 08:49 AM  5 years agoPost 10
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

My Posts: All  Forum  Topic

There is a wealth of info for gassers here.I think Rbort flies more than most folks and flying time and the experience that comes from flying gassers is what counts.Keeping clear of arguments and egos is the only problem that you might encounter in the gasser section Not helpful if you are a novice with gas.Make up your own mind and stick with a mentor that helps the most.Billme amongst others is another very experienced guy.If you are unsure about tuning,pitch and throttle curves for a gasser,they are different,always ask first,it will save you many an engine build.The RC motor is very reliable with its stock ignition system.

Team- unbiased opinion.K.I.S.S principle upheld here

PM  EMAIL  Attn:RR  Quote
08-13-2012 03:38 PM  5 years agoPost 11
Donnie Baker

rrNovice

Indianapolis

My Posts: All  Forum  Topic

Are gassers more difficult to tune than a nitro?

Do you run the risk of damaging a gasser with improper tuning like you do with a nitro?

PM  EMAIL  Attn:RR  Quote
08-13-2012 03:48 PM  5 years agoPost 12
Carey Shurley

rrElite Veteran

Orlando, FL - USA

My Posts: All  Forum  Topic

Are gassers more difficult to tune than a nitro?
no just different. You have to learn new sounds and behavior then it just about like the glow motors.

most of the gasoline motors are not very tolerant of being way off on tuning because of the much higher heat involved. You can seriously damage them in just a few minutes.

On the other hand if you follow basic setup and tuning guidelines they will run what seems like forever

Proprietor - Gas Powered Helicopters

PM  EMAIL  Attn:RR  Quote
08-13-2012 05:35 PM  5 years agoPost 13
Donnie Baker

rrNovice

Indianapolis

My Posts: All  Forum  Topic

Is changing bearings a regular maintenance issue like nitro?

PM  EMAIL  Attn:RR  Quote
08-13-2012 06:29 PM  5 years agoPost 14
payne1967

rrElite Veteran

uk

My Posts: All  Forum  Topic

the bearings should last for years and years
unless you wish to cook the engine and melt the piston
and the its best to change the bearings and wash the crank and case of all the bits of metal

just think of a 2 stroke weedwacker/chainsaw
how often do you change the main bearings on them?
not that often if looked after

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
08-13-2012 06:38 PM  5 years agoPost 15
fastflyer20

rrKey Veteran

N. Tonawanda, NY

My Posts: All  Forum  Topic

I have found gassers much easier to tune than nitros, the feedback is better, they need adjusting less often and as long as you know small tweaks are the norm, you don't drastically change the settings like nitro sometimes require.

PM  EMAIL  Attn:RR  Quote
08-13-2012 08:05 PM  5 years agoPost 16
Kos

rrApprentice

Athens, Greece

My Posts: All  Forum  Topic

with my limited experience, i find gassers irresistable...for me, there is just no turning back...no starters, no batteries, unlimited flying time, almost for free, big helicopters, the sole focus becomes flying itself...totally care-free...am looking into ways of getting rid of my nitros....

PM  EMAIL  Attn:RR  Quote
08-13-2012 10:00 PM  5 years agoPost 17
kraz

rrNovice

Chicago, IL.

My Posts: All  Forum  Topic

PUH vs RC
Hello all,

I agree with the other modelers that the core engine is the same. I believe both types are being modified by the top engine guys. The RC is heainvier due to the way the front of the engine is molded to hold the cooling fan shroud and the larger cooling fan designed by Zenoah. However, this extra weight really isn't that much. If you ever want to auto-start your engine, I believe the RC is the only way to go. Regarding the bearings, they are high quality needle bearings and agreed should last for years except in the rare occasion that the engine is run lean and internal damaged has occured. These engines remember started out in lawn equipment and has to be robust enough to withstand those mean landscapers!

Seriously, the two major items are a quality oil to mix with your fuel and if you're new to gassers, either someone of knowledge in person or rbort or Carey Shurley on Runryder. They have have many years of knowledge and when asked are more than willing to help a fellow modeler.

All the best,

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 1536 views POST REPLY
HomeAircraftHelicopterGasser Model RC HelicoptersOther › PUH vs RC
 Print TOPIC  Make Suggestion 

 8  Topic Subscribe

Monday, June 18 - 12:57 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online