Best Glow Plug OS AX 75: 7, 8, 10? - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
RCCanada - Canada's Radio Control Hobby Forum
Engines Discuss engines

Reply
 
Thread Tools Display Modes
Old 06-22-2019, 07:40 AM   #11
hk4fvj
RCC Apprentice
 
I am: Al M
Join Date: Jun 2015
Location: Milton, On
Radio of choice:
Taranis
# of RCs: 20

Feedback: 0 / 0%
Posts: 73
Total Props: 0
Re: Best Glow Plug OS AX 75: 7, 8, 10?


       Remove this ad - become a site supporter!
Quote:
Originally Posted by Christavia View Post
I’ve been running an OS#6 (old A3) in my 75AX running on Cool Power 15%. I use the same in my 95AX as well. I was running a #8, but it just wouldn’t run right. Keep in mind, we have a field elevation of around 3300’ which likely factors in. I have about 150 flights on the 95AX and 25-30 on the 75AX. Both engines are rock solid...

By the way, what happened to the OS Engines site? It now goes to Horizon Hobbies. All the good info is gon including the troubleshooting guide and FAQ ��
Whitout being an expert, I guess it make sense that you use #6 (the old A3) living at 3,300 ft ASL. Do you guys recommend me to try it? Again, I live in SW Ontario which is about 600 ft ASL and with a #7 plug, the engine rattles too loud. But at the same time it fires better than a # 8!!!!
I use Nitro 15%.
hk4fvj is offline   Quick reply to this message.

Sponsored Links - Subscribe to remove this ad.
Old 06-22-2019, 07:44 AM   #12
Cougar429
Level 3 Supporter
★ Site Supporter ★
 
Cougar429's Avatar
 
I am: Gary L
Join Date: Aug 2008
Location: Tecumseh, Ontario

Feedback: 94 / 100%
Posts: 6,785
Total Props: 39
Re: Best Glow Plug OS AX 75: 7, 8, 10?

As was posted, your plug choice depends a lot on external factors such as fuel, environment, mounting orientation, etc. Unless you are running high nitro contents, I have never personally seen where plug temps would make an engine sound like you describe.

My own experience had the #8 as the go to standard, switching to #3 when temps closed on freezing and below. In some extreme cases, and where engines were inverted, I opted for the much hotter OS "F" or "R" to keep the plug lit at lower throttle.

Lucky you are able to run a 3-blade successfully. I never was able to since the drag of the extra blade usually kept the engines from reaching the rather narrow peak band.

Having said that, my largest 2-stroke attempt topped out at 60 size.

The Super 'Bolt is an excellent performer that regardless of whatever else I want to try, always comes to the field to assuage my need for some radical stick time. Mine in the pic is towed behind a Saito 100. Only problem I found is when really honking around I can make it snap rather suddenly.
Attached Thumbnails
Click image for larger version

Name:	IMG_1751.jpg
Views:	13
Size:	709.7 KB
ID:	1634817  
__________________
I know there's money in aviation........I put it there!
Cougar429 is offline   Quick reply to this message.
Old 06-22-2019, 12:39 PM   #13
jsparky
Level 3 Supporter
★ Site Supporter ★
 
jsparky's Avatar
 
I am: jeff
Join Date: Aug 2011
Location: Waterloo Ontario
Radio of choice:
Taranis plus FrSky Horusist
# of RCs: 20

Feedback: 10 / 100%
Posts: 1,319
Total Props: 19
Re: Best Glow Plug OS AX 75: 7, 8, 10?

Quote:
Originally Posted by Cougar429 View Post
closed on freezing I opted for the much hotter OS "F" or "R" to keep the plug lit at lower throttle.
Actually Gary.. the OS F plug is a very cold plug
__________________
No Guts
No Glory
No Fear
The Cat is Back !


The two stupidest answers in the world are !!

JUST BECAUSE and
THAT IS THE WAY WE HAVE ALWAYS DONE IT.
jsparky is offline   Quick reply to this message.
 
Old 06-22-2019, 03:13 PM   #14
Christavia
RCC Junior Contributor
 
I am: Ken B
Join Date: Feb 2016
Location: Calgary, AB
Radio of choice:
Hitec
# of RCs: 11

Feedback: 5 / 100%
Posts: 123
Total Props: 20
Re: Best Glow Plug OS AX 75: 7, 8, 10?

I’m pretty sure Gary is correct. The 4-stroke engine runs cooler than a 2-stroke and requires a hotter plug to keep running...
__________________
Ken B
MAAC 26604
IMAC 7589
Saved by my Christavia MK 1
Christavia is online now   Quick reply to this message.
Old 06-22-2019, 03:43 PM   #15
jsparky
Level 3 Supporter
★ Site Supporter ★
 
jsparky's Avatar
 
I am: jeff
Join Date: Aug 2011
Location: Waterloo Ontario
Radio of choice:
Taranis plus FrSky Horusist
# of RCs: 20

Feedback: 10 / 100%
Posts: 1,319
Total Props: 19
Re: Best Glow Plug OS AX 75: 7, 8, 10?

Quote:
Originally Posted by Christavia View Post
I’m pretty sure Gary is correct. The 4-stroke engine runs cooler than a 2-stroke and requires a hotter plug to keep running...
Where do you see the type F on this chart..

Here is another link..

http://shop.rotor.com.sg/show-detail.asp?prodid={1D7D17EE-25C7-4760-AD4C-2BF0C998F0B9}&pn=#.XQ6BRT9yqUk

The terms HOT / COLD do not relate to the temperature of the plug.. but rather to how it reacts to the methanol ..
Attached Thumbnails
Click image for larger version

Name:	oschart.jpg
Views:	24
Size:	113.2 KB
ID:	1634851  
__________________
No Guts
No Glory
No Fear
The Cat is Back !


The two stupidest answers in the world are !!

JUST BECAUSE and
THAT IS THE WAY WE HAVE ALWAYS DONE IT.
jsparky is offline   Quick reply to this message.
Old 06-22-2019, 08:18 PM   #16
Christavia
RCC Junior Contributor
 
I am: Ken B
Join Date: Feb 2016
Location: Calgary, AB
Radio of choice:
Hitec
# of RCs: 11

Feedback: 5 / 100%
Posts: 123
Total Props: 20
Re: Best Glow Plug OS AX 75: 7, 8, 10?

Good explanation from plug distributor... see the overview: https://www.horizonhobby.com/4-cycle-super-plug-han3011
__________________
Ken B
MAAC 26604
IMAC 7589
Saved by my Christavia MK 1
Christavia is online now   Quick reply to this message.
Old 06-22-2019, 09:31 PM   #17
lazyace
RCC Contributor
 
I am: Dennis P
Join Date: Mar 2017
Location: Ontario, Windsor
Radio of choice:
hitec
# of RCs: ???

Feedback: 2 / 100%
Posts: 403
Total Props: 9
Re: Best Glow Plug OS AX 75: 7, 8, 10?

I've read all the charts and such and refer to them sort of tongue and cheek as there is no standard between brands. OS's hot/med/cold references comparison of their brand. It does not mirror the other brands. I have so many different glo plugs its not funny. After trying all of them I have for my use narrowed it down to the OS F or YS plug (the same sold and packaged as a YS plug they were 1.50 to 2.00 cheaper) It makes a difference as I buy by the card. For all my two strokes big and small I only use a McCoy MC-14.

Dennis
lazyace is offline   Quick reply to this message.
Old 06-22-2019, 09:35 PM   #18
jsparky
Level 3 Supporter
★ Site Supporter ★
 
jsparky's Avatar
 
I am: jeff
Join Date: Aug 2011
Location: Waterloo Ontario
Radio of choice:
Taranis plus FrSky Horusist
# of RCs: 20

Feedback: 10 / 100%
Posts: 1,319
Total Props: 19
Re: Best Glow Plug OS AX 75: 7, 8, 10?

Quote:
Originally Posted by Christavia View Post
Good explanation from plug distributor... see the overview: https://www.horizonhobby.com/4-cycle-super-plug-han3011
That is not an explanation.. It is a sales pitch.. BIG difference..
__________________
No Guts
No Glory
No Fear
The Cat is Back !


The two stupidest answers in the world are !!

JUST BECAUSE and
THAT IS THE WAY WE HAVE ALWAYS DONE IT.
jsparky is offline   Quick reply to this message.
Old 06-22-2019, 10:00 PM   #19
jsparky
Level 3 Supporter
★ Site Supporter ★
 
jsparky's Avatar
 
I am: jeff
Join Date: Aug 2011
Location: Waterloo Ontario
Radio of choice:
Taranis plus FrSky Horusist
# of RCs: 20

Feedback: 10 / 100%
Posts: 1,319
Total Props: 19
Re: Best Glow Plug OS AX 75: 7, 8, 10?

Quote:
Originally Posted by lazyace View Post
I have so many different glo plugs its not funny.
Dennis
Yup.. I know that one all to well.. back when I started back into this.. I had more types of plugs than I knew what to do with.. enya with idle bars etc..

Was checking around today at the price of the nitro fuel I use.. and it is now up to 60 bucks a jug...

So !! this evenings flights went very well with my nitro to gas conversions.. I have worked out a couple more little bugs and moved from 95% to 99% to a well proven conversion..

Think my nitro days may well be gone.. since if I can't buy an engine in the gas size I want.. I will just convert it now..
__________________
No Guts
No Glory
No Fear
The Cat is Back !


The two stupidest answers in the world are !!

JUST BECAUSE and
THAT IS THE WAY WE HAVE ALWAYS DONE IT.
jsparky is offline   Quick reply to this message.
Old 06-27-2019, 02:46 PM   #20
David Ford
RCC Apprentice
 
I am: Dave F
Join Date: Aug 2013
Location: Brantford Ontario
Radio of choice:
Spectrum airtronics
# of RCs: 4

Feedback: 10 / 100%
Posts: 45
Total Props: 0
Re: Best Glow Plug OS AX 75: 7, 8, 10?

HK4FVJ,
Did you solve your issue? Reading your comments it seems to me you may have other issues and not just the plug. I too live in your area and can run a medium or medium hot plug in any 2 stroke glow engine that size with your fuel without much or any change in the engine response.
Do you have some pictures of the installation? Is the engine cowled in? Are you running the mfg. recommended prop? Stock muffler?
What about the fuel lines and the tank are they in good shape and installed correctly.
You might consider getting the engine out of the plane and on to a test stand where you have a known tank/lines/prop etc and see how it performs.
I run engines in a test stand based on the recommendations of Dub Jett who makes engines, he is a wise man.

I hope it turns out ok
David Ford is offline   Quick reply to this message.
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the RCCanada - Canada Radio Controlled Hobby Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionally, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Radio of choice?
Which radio is your current favorite to use?
Number of RC Vehicles?
How many boats, cars, planes do you own?

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
vBulletin Message

Thread Tools
Display Modes

Forum Jump


All times are GMT -5. The time now is 11:58 PM.


vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.