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Search: Posts Made By: JPMacG
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Forum: Glow Engines
09-03-2021, 04:30 PM
Replies: 28
Views: 2,605
Posted By JPMacG

At our club we get one or two guys every year who...

At our club we get one or two guys every year who want glow planes but don't have much money to spend. We pick up planes from estates now and then, fix them up, and store them. Then when someone...
Forum: RC Fuels
08-26-2021, 08:46 AM
Replies: 4
Views: 2,058
Posted By JPMacG

I use isopropyl alcohol. It works similarly to...

I use isopropyl alcohol. It works similarly to methanol and is less toxic. But soap and water are probably better.
Forum: Glow Engines
02-13-2021, 01:58 PM
Replies: 101
Views: 13,037
Posted By JPMacG

When will glow come back? I think never - never...

When will glow come back? I think never - never to the level glow once had. Glow will continue on as a viable power source for those who want it. When the market in used glow engines dries up then...
Forum: RC Fuels
02-12-2021, 08:05 AM
Replies: 6
Views: 1,665
Posted By JPMacG

I just multiplied the desired percentages (as a...

I just multiplied the desired percentages (as a decimal, not percent) by 128, the number of ounces in a gallon. After I determined the quantity of oils and nitro I subtracted them from 128 to find...
Forum: RC Fuels
02-11-2021, 11:58 AM
Replies: 6
Views: 1,665
Posted By JPMacG

32 oz nitromethane 20.5 oz klotz synthetic ...

32 oz nitromethane
20.5 oz klotz synthetic
2.5 oz castor
73 oz methanol

This will produce 1 gallon of fuel with 25% nitro and 18% oil consisting of 16% synthetic and 2% castor.
Forum: Glow Engines
02-03-2021, 09:12 AM
Replies: 6
Views: 510
Posted By JPMacG

Inspect the bearing cage on the rear bearing....

Inspect the bearing cage on the rear bearing. They come apart gradually and introduce little pieces of shrapnel into the cylinder. I ignored the initial sign (mangled glow plug element) on one of my...
Forum: Glow Engines
01-17-2021, 12:04 PM
Replies: 2
Views: 473
Posted By JPMacG

Yes, good advice.

Yes, good advice.
01-11-2021, 04:52 PM
Replies: 9
Views: 1,057
Posted By JPMacG

How about Sig? I bought a kit directly from them...

How about Sig? I bought a kit directly from them in 2019.
Forum: RC Fuels
01-08-2021, 09:34 AM
Replies: 13
Views: 2,207
Posted By JPMacG

It is methanol, not nitromethane, that supports...

It is methanol, not nitromethane, that supports the catalytic reaction. I run 80% methanol, 20% oil in some of my engines. It runs just fine. Nitromethane is not necessary, although it produces a bit...
12-26-2020, 01:25 PM
Replies: 3
Views: 1,282
Posted By JPMacG

I store engines in a heated basement. In the...

I store engines in a heated basement. In the summer I run a dehumidifier. The RH is always below 50%. I run the engines dry at the end of each flying session with no after run oil or storage oil. ...
Forum: Glow Engines
12-05-2020, 08:41 PM
Replies: 101
Views: 13,037
Posted By JPMacG

Jesse, Yes, please send me a PM. I am...

Jesse,
Yes, please send me a PM. I am interested in VP Racing 50/50 nitromethane/methanol in 5 gallon cans. I blend my own fuel.
Forum: Glow Engines
12-05-2020, 03:21 PM
Replies: 101
Views: 13,037
Posted By JPMacG

Jesse, How do you obtain your VP Racing...

Jesse,
How do you obtain your VP Racing 5-gallon cans? I tried to purchase VP Racing nitromethane from a local dealer and the shipping cost was prohibitive.
09-05-2020, 09:33 AM
Replies: 3
Views: 1,153
Posted By JPMacG

I think the sensitivity setting refers to the...

I think the sensitivity setting refers to the delta peak detection. NiCd and NiMH cells exhibit a slight dip in voltage as they approach full charge. This is how the charger knows when the battery is...
Forum: RC Fuels
11-05-2018, 06:24 PM
Replies: 1
Views: 1,097
Posted By JPMacG

The OS user's manual recommends fuel containing...

The OS user's manual recommends fuel containing 5% to 15% nitromethane. I think your engine will run on FAI, and probably quite well. The needles may be more difficult to adjust than with fuel...
Forum: Beginners
10-21-2018, 05:59 PM
Replies: 34
Views: 3,018
Posted By JPMacG

OK. I fell for it - very old post. I should have...

OK. I fell for it - very old post. I should have caught on when everyone was talking about glow engines.
07-24-2018, 07:52 AM
Replies: 7
Views: 610
Posted By JPMacG

My opinion is that gasoline is a good choice for...

My opinion is that gasoline is a good choice for 1.20 cubic inch and larger. Glow and electric are better choices for 1.20 and below. The small gas engines are heavy, costly and some say not well...
Forum: Glow Engines
07-22-2018, 06:04 PM
Replies: 8
Views: 3,345
Posted By JPMacG

I run my Saito 72 and Saito 100 on 10% nitro with...

I run my Saito 72 and Saito 100 on 10% nitro with 18% oil. They run great. I have not noticed a difference between 10% and 15% nitro, but I do think I get a better idle on 18% oil than I do on 20%...
Forum: The Clubhouse
04-29-2018, 07:24 AM
Replies: 8
Views: 2,152
Posted By JPMacG

More likely, because of financial trouble, Tower...

More likely, because of financial trouble, Tower cannot afford to stock products that are not top sellers. We can purchase directly from Top Flight. www.top-flite.com...
Replies: 11
Views: 1,553
Posted By JPMacG

I personally recommend that you buy the 2.4 GHz...

I personally recommend that you buy the 2.4 GHz radio. 72 MHz has become so uncommon at most fields that people will not know what the "string" coming out of your airplane is. You will be...
Forum: Beginners
04-17-2018, 09:19 AM
Replies: 29
Views: 2,790
Posted By JPMacG

Kids have no reason to be interested in model...

Kids have no reason to be interested in model aviation. The local airports have disappeared. Most kids have never seen an airplane other than perhaps a commercial airliner. They have never met a...
Forum: RC Fuels
03-20-2018, 07:37 PM
Replies: 11
Views: 4,133
Posted By JPMacG

Since my original post I have returned to the...

Since my original post I have returned to the dealer for more methanol. I learned that he back fills his tanks with nitrogen and keeps a slightly positive pressure so the tank does not breath. ...
Forum: RC Fuels
03-20-2018, 07:33 PM
Replies: 3
Views: 3,337
Posted By JPMacG

I have used S&W fuel for many years. S&W is...

I have used S&W fuel for many years. S&W is popular around this area. No complaints. They will blend fuel to your specifications - just give them a call.
03-13-2018, 04:46 PM
Replies: 5
Views: 7,219
Posted By JPMacG

I always discharge to 1.0 V per cell. The...

I always discharge to 1.0 V per cell. The discharge curve is steeply sloped below 1.0 volt, so very little energy is left within the cell. Going below 1.0 volt would risk reverse charging one of the...
Forum: Beginners
03-13-2018, 04:00 PM
Replies: 6
Views: 682
Posted By JPMacG

I have faced the same problem several times. ...

I have faced the same problem several times. There is no way I could make a new slot through CA hardened balsa and keep it centered. I had to go with Robarts. Not my favorite, as they are time...
Replies: 7
Views: 1,249
Posted By JPMacG

I have had very good luck with Futaba servos,...

I have had very good luck with Futaba servos, particularly the S148. I have some that are probably 20 years old. Most of my servo failures were other brands, particularly high torque servos. And most...
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