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Search: Posts Made By: hpergm
Showing results 1 to 25 of 53
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Forum: Gas Engines
01-09-2023, 04:52 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

Exactly what you said above.

Exactly what you said above.
Forum: Gas Engines
01-01-2023, 11:10 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

No, the engines are bone stock. I estimate about...

No, the engines are bone stock. I estimate about 10hrs on each (I do not keep a time log). But, I do re-oil the valve train and check/retighten the cylinders every 6 tanks (i.e. 1hr or approx every 2...
Forum: Gas Engines
12-25-2022, 07:22 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Yep. Exactly the same.

Yep. Exactly the same.
Forum: Gas Engines
12-23-2022, 08:28 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

https://www.rcuniverse.com/forum/12488502-post271....

https://www.rcuniverse.com/forum/12488502-post271.html
And
https://www.rcuniverse.com/forum/12685752-post487.html
Forum: Gas Engines
12-19-2022, 08:56 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

Yes, I do. Actually 2 of them plus a 90. They all...

Yes, I do. Actually 2 of them plus a 90. They all purr. Just keep the fuel fresh, oil up and intake air cool. Visit the 90 thread for that last tip.
Forum: Gas Engines
12-18-2022, 02:00 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

Glad that long treatise I sat down to write back...

Glad that long treatise I sat down to write back in the day was useful to you!
Happy flying and safe landings,
Hector.
Forum: Gas Engines
02-22-2021, 07:38 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Hi Dave, the dummy engine was included with the...

Hi Dave, the dummy engine was included with the TF kit. Just painted it...
Forum: Gas Engines
04-25-2020, 11:42 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Hi Brad. Make sure you did the valve adjustments...

Hi Brad. Make sure you did the valve adjustments at the proper TDC (there's 2 per cycle). You can tell by looking at the valves; the proper TDC is when there's no overlap on valve movement.

One...
Forum: Gas Engines
11-17-2019, 01:40 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Cathurga, what prop were you running? What was...

Cathurga, what prop were you running? What was the max ground rpm out of it? What is your bolt tightening schedule (e.g every 3 flights?)

A cylinder break is either due to a high BMEP/low cyl....
Forum: Gas Engines
11-16-2019, 07:00 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

A friend bought the 7-90 gas version of the UMS....

A friend bought the 7-90 gas version of the UMS. Sounds good but the open rockers are a nuisance (cowl off to lubricate and an oily mess splattered on the firewall) and adjusting the carb in parallel...
Forum: Gas Engines
10-12-2016, 01:22 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

Joe, rotating the engine on the stand helps...

Joe, rotating the engine on the stand helps accelerate the bedding in of the lower cylinders. You would need 1 tank per cylinder (0.5lt). Max safe No.1 temps are about 200C, but beware of the IR...
Forum: Gas Engines
10-11-2016, 10:57 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

Hi Joe. What you experience at WOT is normal for...

Hi Joe. What you experience at WOT is normal for a new FG-60R3. The tolarances are still tight around the bottom cylinders while the mixture is not optimal, that's why the engine bogs down at top...
Forum: Gas Engines
03-10-2016, 09:09 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Correct. I get 6,700 max, backed off to 6400.

Correct. I get 6,700 max, backed off to 6400.
Forum: Gas Engines
01-13-2016, 03:53 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

No worries, a 23x8 will be OK. Don't forget, this...

No worries, a 23x8 will be OK. Don't forget, this is a 4stroke with plenty of torque to turn longer props. Also, the absence of load during break in is not always beneficial, in that the increased...
Forum: Gas Engines
01-11-2016, 11:34 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

You are actually right chorner, the APC obtains...

You are actually right chorner, the APC obtains higher rpm because of its slender profile near the tips. When I tried to fly the engine at a 35C day, the plane could barely make the first turn at...
Forum: Gas Engines
01-11-2016, 11:29 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

6500 on the APC 22x10 is A-OK! Go fly it.;)

6500 on the APC 22x10 is A-OK! Go fly it.;)
Forum: Gas Engines
01-09-2016, 01:28 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Answer #1: Yes, floor it. If its rich @ 4000rpm,...

Answer #1: Yes, floor it. If its rich @ 4000rpm, it's OK. I would recommend opening the High at least 7 turns before you start it so that there is absolutely no way you run it lean @ high throttle.
...
Forum: Gas Engines
12-16-2015, 11:14 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Here you...

Here you go....:http://www.rcuniverse.com/forum/rc-warbirds-warplanes-200/11594059-top-flite-giant-zero-86-span.html
Forum: Gas Engines
12-15-2015, 09:31 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Quite true, I also found this when I did the same...

Quite true, I also found this when I did the same thing. No.1 is always dry due to gravity and heat. Putting a breather on and connecting it to somethwere else in the engine may upset the pressure...
Forum: Gas Engines
12-15-2015, 09:27 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Currently have it on a TF FW190. Next for me - a...

Currently have it on a TF FW190. Next for me - a Zero as well!! Keep the Zero thread posted then.

I am sure you've seen that, but here goes:
https://www.youtube.com/watch?v=whs6G5N1bKE
Forum: Gas Engines
12-13-2015, 10:24 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

Hey Alf, Absoutely fine to be a bit grumpy...

Hey Alf,

Absoutely fine to be a bit grumpy after forking out ~1,000 good ones on the motor.
However, let's be pragmatic - the only way we can get a small gas radial below 1,000 (think of that a...
Forum: Gas Engines
12-13-2015, 12:37 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

Hey Alf. Regarding the valves: there are 2...

Hey Alf.

Regarding the valves: there are 2 TDCs in the cycle where both valves stop moving - the power stroke TDC and the exhaust stroke TDC. But only one is the right one to make the adjustment -...
Forum: Gas Engines
12-08-2015, 12:06 PM
Replies: 2,806
Views: 711,642
Posted By hpergm

Hi Alfiev. 6,000 is too low even for an XOAR......

Hi Alfiev. 6,000 is too low even for an XOAR... Something is amiss in your set-up. May I propose the folliowing:
1. Check that your throttle barrel is 100% open (not 90% and not 105%, which also...
Forum: Gas Engines
11-15-2015, 10:10 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

Needle guide installation from the TF FW190... ...

Needle guide installation from the TF FW190...
You just need a couple of drinking straws, 2 plywood mounts and a 1.5mm(or 2-56?) hex bolt for the High needle (so you can turn it with a long hex...
Forum: Gas Engines
10-07-2015, 02:39 AM
Replies: 2,806
Views: 711,642
Posted By hpergm

If you read a while back, you will see that when...

If you read a while back, you will see that when not in perfect tune, the engine will lean out the top cylinder and cause the bottom ones to misfire.
In the ground one solution is to heat-cycle...
Showing results 1 to 25 of 53
 
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