Glow Plug Comparison 

100 years from now, people will still be watching Dave's Stuff videos as an enduring historical archive.

I'm just choosing some new plugs for my planes so thanks for sharing your video. I had to giggle at 0:54 when the noisy car drove past and speach cloud popped up saying get a muffler then you started that loud plane engine up. 🤣🤣🤣🤣BRILLIANT. 👍

David, sometime around 1996 to 2000, I did a very similar test using a Saito FA 80 GK and a Webra Speed 60. I remember using an Enya , OS-F, Fox Miracle, K&B, Supertigre, Glo Devil, McCoy MC-4C, Saito P-2, along with perhaps a few more. I used 5% fuel with 100% Klotz oil and the test was in the early fall, low humidity and temps in the low 70's. The big difference was that I tuned the high end and low end for each plug, realizing each plug may react differently for carb settings, atmospheric conditions, and 5% fuel. I remember taking great pains to pick a day where the temps and weather conditions were stable and I didn't have to break out my engineering books to adjust for differing atmospheric conditions. I wish I had the records I made but I've only had about 6 corporate moves since then. Regardless, what I clearly remember is that the plug that stood out over all of the others was the Saito P-2, hands down. The nearest plug to it was a McCoy MC-4c, then the OS-F. They were down about 250 RPM. The P-2 gave me the best throttle and the best transition from idle to full power. People can say anything on the internet but in 35+ years, I never had an engine sputter on me or quit in flight (other than running out of fuel), costing me an airplane, with the exception of one time. I wish I had bought more of the P-2s but I still have about 8 of them and they'll last me until I make my last flight. I appreciate your efforts and enjoyed the posting of your tests. Thank you!

If you decide to do a part deux on glow plugs it would really be good to tune the engine to each plug and get good idle data. It wasn’t a big surprise that the top ends were similar with no plug specific tuning. Atmospheric conditions likely play a bigger role in tuning than the composition of the plug elements but without tuning to each plug that remains an unknown. Idle and transition are more important to me than an extra 200 rpm. Don’t get me wrong; this is a helpful video and as always, enjoyable. There’s just more to learn.

I checked my glow plug with my 2.4 volts input and it barely glows whats going on? Its also very hard to start.

Nice job! That OS sounds BANG ON tune wise. Idle and top end needles are so important to making these jewels shine! I have previously spent time on Saito's and many others and agree 100% with your findings. I do have a couple of videos on here so please see them. Meantime I love your content and direction with these beautiful little peices of engineering! Cheers from downunder!! Sorry, i meant to add my favourite plug of all... OS 'F' on pretty much any 4-stroke, OS No. 8 on 90% of 2-strokes on less than 15% nitro.

I'm using an OS Type F on my 2-stroke 46AX and I'm getting surprisingly good results. It fixed the peak power and transition problems that my engine was facing with high nitro fuel, and in the hot climate where I live.

Sweet little engine. Amazing the difference a glow plug makes.

YS used to recommend the Enya #3 in their owner manuals for the 120AC and 120SF.

Hey Dave, if you haven't done a video for the near total noob yet, how about a video like that which shows what all those hose lines go to and why, what kind/size prop, and what is needed to get an engine running? I have a few nice used engines I bought over the last few years on Ebay, none have props, I don't intend to put them in planes I just always thought these mini engines were so cool I wanted them as engines. Besides a couple of Cox bee's, and a Cox dune buggy engine 0.49, I have a Saito FA 30S, OS Max 10 FP, and an OS Max 40 FP. They are all nice clean engines, good compression, and a couple of them have their original boxes and paperwork etc. I can remember having a Cox Bee engine and attaching it to a board in the basement as a kid and running it a couple of times, that sucker was LOUD! And I remember I had a Cox dune buggy and wanting a larger airplane engine but I think dad was afraid of the size of the props on them so he wouldn't budge on buying one for me!

Isn't the enya#3 a 2stroke plug?

Excellent vid

Great video!! Well interesting ... And it seemed to me that the hangar 9 plug did not show rpm drop when rethrottle

I find that it is best to adjust the mixture as rich as possible while still getting good performance. Otherwise it will begin to lean out as the engine gets hotter.

Sir why is it almost stall on half throttle transition ? LSN is not balanced to the HSN. maybe the the low needle needs to lean down just 5 deg. The os f plug had a great number on your review i'm using 10% on fuel and f plug good to run at any weather condition and higher altitudes. Great info on your review

Yeah I was skeptical the plugs would make any real difference, maybe at start up or when cold, but I wouldn't think when running.

Thank you video!

Hi Dave thanks for sharing the video just wondering might you know what the benefit of os plug no6 than os plug no8 ? Thanks

Great engine!

Nice vid

"get a muffler" as he fires up his rc engine that 10x louder haha

I hate having to fool around with glow plug igniters and stuff

Hello. What kind of fuel did you use ? BR. Jerzy

Prop size for this Os. 52?

The transition from idle to wide open was a little different different.

Maybe I overlooked something David. Can you recall the prop size ?

Dave, seems like the H-9 Super Plug gave a little better transition than the others.

Sorry to make this comment, David wath do you think about lost the glow era? against electrics

thanks

Nice exhaust pipe!!

👍👍🤟🤟