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Search: Posts Made By: hpergm
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Forum: Gas Engines
04-25-2020, 11:42 AM
Replies: 2,636
Views: 341,318
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: 2,636
Views: 341,318
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: 2,636
Views: 341,318
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: ARF or RTF
11-09-2019, 12:06 PM
Replies: 81
Views: 10,675
Posted By hpergm

Hi Dale, thanks. I have since tweaked the CG...

Hi Dale, thanks. I have since tweaked the CG (moved it further back) and went to a x10 pitch prop; no more aileron trim changes and lands herself like a trainer, touch and goes are out of this world....
Forum: ARF or RTF
11-09-2019, 11:30 AM
Replies: 81
Views: 10,675
Posted By hpergm

The maiden flight video shows just a spec on the...

The maiden flight video shows just a spec on the horizon, so let's move on to the first landing.
Things got interesting on that one: speed variations caused constant aileron trim changes, so...
Forum: ARF or RTF
11-09-2019, 11:05 AM
Replies: 81
Views: 10,675
Posted By hpergm

Owing to the difficulty of assebling the plan on...

Owing to the difficulty of assebling the plan on the field (sliding on the wings with one hand, with the wheels scraping the tarmac and the other hand holding the fuz upright) I decided to build a...
Forum: ARF or RTF
08-28-2019, 09:30 PM
Replies: 38
Views: 6,568
Posted By hpergm

Thanks for the advice, I am already thinking how...

Thanks for the advice, I am already thinking how to mitigate failures in this area. You are right, some cloth might be in order here. Anyhow, any noseweight is good!
Forum: ARF or RTF
08-24-2019, 03:13 AM
Replies: 38
Views: 6,568
Posted By hpergm

I have also bitten the bullet with this offering...

I have also bitten the bullet with this offering and it does not disappoint. Only thing is, the 2-stroke sound may not do full justice to the potential presence of this airframe. So, here goes yet...
Forum: Gas Engines
08-04-2019, 12:39 AM
Replies: 422
Views: 86,689
Posted By hpergm

Just copying a link from another thread related...

Just copying a link from another thread related to a 97" Gee Bee Y with an FG90 featuring the Meier ring:
http://www.rcuniverse.com/forum/12539463-post78.html

Engine has been run vertically in as...
Forum: ARF or RTF
07-25-2019, 09:44 AM
Replies: 81
Views: 10,675
Posted By hpergm

And the vid from the maiden taxi trials:...

And the vid from the maiden taxi trials: https://youtu.be/REGzU1w0fTI
(was enjoying the sound, couldn't bring myself to take her off..)
Forum: ARF or RTF
07-25-2019, 09:37 AM
Replies: 81
Views: 10,675
Posted By hpergm

Hi Dale. Model has been completed and maidened....

Hi Dale. Model has been completed and maidened. Took some tail weight to balance out the FG-90, incl mounting the 2 Rx batts behind the cockpit. Flies very nice, lands easy and has scale speed. Only...
Forum: Gas Engines
01-06-2019, 06:05 AM
Replies: 422
Views: 86,689
Posted By hpergm

Break in progressing well; all cylinders are heat...

Break in progressing well; all cylinders are heat cycling and balancing EGTs well at certain throttle settings...
Mixtures are still set very rich. Max rpm does not go above 5.5k rpm - there is...
Forum: Gas Engines
12-26-2018, 01:57 AM
Replies: 422
Views: 86,689
Posted By hpergm

First run today at the mountain (keeps the...

First run today at the mountain (keeps the neighbours happy). Was able to hand start it (!).
Went through 1.5lt of 1:15 fuel. RPM was kept below 4k. Music (ring muffler) by Meier.
Instrumentation...
Forum: ARF or RTF
12-25-2018, 04:10 PM
Replies: 81
Views: 10,675
Posted By hpergm

https://cimg9.ibsrv.net/gimg/www.rcuniverse.com-vb...

https://cimg9.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/2000x2000/20181209_171559_15a246fbe5a33f392c376d561b3e41dd142e8c11.jpg
The Maxford kit provides pass-through aluminum tubing preinstalled in...
Forum: Gas Engines
12-25-2018, 04:00 PM
Replies: 422
Views: 86,689
Posted By hpergm

Thanks Jagdpanther. Dan, yes the FW190 lives...

Thanks Jagdpanther.

Dan, yes the FW190 lives on. The 90 will go to a GeeBee. Being a little bit wiser this time, I am going to try netralising gravity for the over-rich initial runs to get all...
Forum: ARF or RTF
12-25-2018, 09:27 AM
Replies: 81
Views: 10,675
Posted By hpergm

https://cimg4.ibsrv.net/gimg/www.rcuniverse.com-vb...

https://cimg4.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/2000x2000/20181209_171547_c2b0146d4851ceb8d670e921915eaed605fe188d.jpg
A wider view.
Forum: ARF or RTF
12-25-2018, 09:25 AM
Replies: 81
Views: 10,675
Posted By hpergm

https://cimg6.ibsrv.net/gimg/www.rcuniverse.com-vb...

https://cimg6.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/2000x2000/20181209_171547_5385ba9aa34e88800b0a4450e44f5b46f9a2fade.jpg
Just to share some of the mods to stabilise the LG laterally. Brazed...
Forum: Gas Engines
12-24-2018, 12:34 PM
Replies: 422
Views: 86,689
Posted By hpergm

Mine's prepped for the break in. Well oiled up,...

Mine's prepped for the break in. Well oiled up, all valves checked (only one out of tolerance), instrumentation installed. At least 1lt vertical to make sure all cylinders heat...
Forum: ARF or RTF
11-03-2018, 07:12 AM
Replies: 81
Views: 10,675
Posted By hpergm

Maxford RC version...

I too have recently obtained the Maxford version of the plane (the V2). Came well packaged, looks great, built straight and light. I will use the Saito FG90R3 radial, which fits well. The adjustable...
Forum: ARF or RTF
02-05-2017, 10:51 AM
Replies: 192
Views: 35,132
Posted By hpergm

Hi. If you fail to find one (which is more than...

Hi. If you fail to find one (which is more than probable, sorry...), then why not take a look at the EcomRCMoth? Just google it..
Its similar- almost, but not quite. :(
Forum: ARF or RTF
01-15-2017, 11:55 AM
Replies: 192
Views: 35,132
Posted By hpergm

Sorry to hear of the wing fold - what did you do...

Sorry to hear of the wing fold - what did you do to the plane, snaprolls...?? :cool:

As for the smoke system, I have been giving it some thoughts too but the space inside the fuz is indeed really...
Forum: ARF or RTF
01-14-2017, 10:17 AM
Replies: 192
Views: 35,132
Posted By hpergm

Hi Rafeek - been some time! After all those years...

Hi Rafeek - been some time! After all those years owning the plane, I never had a video of it flying other than the maiden back in 2012.. So, as it happened I tried to start the new year with a...
Forum: Gas Engines
10-12-2016, 01:22 PM
Replies: 2,636
Views: 341,318
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: 2,636
Views: 341,318
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...
09-15-2016, 07:49 AM
Replies: 451
Views: 70,648
Posted By hpergm

Sorry to hear about that... Let us know what's...

Sorry to hear about that... Let us know what's the condition of the engine after you take it out. Saitos are light so not really famed for crash durability.
Showing results 1 to 25 of 365
 


 
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