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Forum: RC Jets

04-30-2017, 10:09 AM

Replies: 19

Merlin 140XBL Full Throttle Problem

Views: 3,835

Posted By JSF-TC

Problem solved!!;) After a couple of false...

Problem solved!!;)

After a couple of false leads, I ruled out any radio or installation issue, as I could reproduce the rpm drop on the test stand with a completely independent set-up.

Along...

Forum: RC Jets

04-27-2017, 06:03 PM

Replies: 19

Merlin 140XBL Full Throttle Problem

Views: 3,835

Posted By JSF-TC

Status update on the troubleshooting. After...

Status update on the troubleshooting.

After sending Gaspar both the Jeti TM logs and the ECU data download, he suggested that there may be an issue with the ECU, so he shipped me a replacement ECU...

Forum: RC Jets

04-17-2017, 06:44 PM

Replies: 19

Merlin 140XBL Full Throttle Problem

Views: 3,835

Posted By JSF-TC

Jeti 5200mAh Li-Ion, sitting at 7.2V during the...

Jeti 5200mAh Li-Ion, sitting at 7.2V during the run as shown in the plot above.

I can get at least 5 starts and flights from it before needing to recharge. This run was fresh off the charger.

I...

Forum: RC Jets

04-17-2017, 12:58 PM

Replies: 19

Merlin 140XBL Full Throttle Problem

Views: 3,835

Posted By JSF-TC

Well, there's more to this than I first thought. ...

Well, there's more to this than I first thought.

Where I thought I had found the issue, as Gaspar suggested, I installed a replacement Air Trap and performed a ground run. Yet again, I observed...

Forum: RC Jets

04-10-2017, 04:45 PM

Replies: 19

Merlin 140XBL Full Throttle Problem

Views: 3,835

Posted By JSF-TC

So, it looks like Gaspar hit the nail on the...

So, it looks like Gaspar hit the nail on the head.

I removed the Air Trap and ran the main fuel tank directly into the shut-off valve then to the pump. On running the engine, the Pw dropped by...

Forum: RC Jets

04-09-2017, 06:08 PM

Replies: 19

Merlin 140XBL Full Throttle Problem

Views: 3,835

Posted By JSF-TC

AJP, Thanks, and that is exactly the...

AJP,

Thanks, and that is exactly the suggestion I got from Gaspar this morning. He is suspecting pump cavitation on the inlet line, so he suggested starting from an external tank direct to the...

Forum: RC Jets

04-08-2017, 12:44 PM

Replies: 19

Merlin 140XBL Full Throttle Problem

Views: 3,835

Posted By JSF-TC

Merlin 140XBL Full Throttle Problem

I installed a new Merlin 140XBL in my Ultra Flash late last year. At first it seamed like a fire-breathing monster, but I soon adapted to it (Wren SuperSport was installed previously). However,...

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