JFS-100-13A Test for the GolfJet

GolfJet engine on the test stand. The bearing carrier for the output shaft and the output shaft have been added, and 1" aluminum plate that will attach it to the golf cart itself. I've also added the pulley for the generator for the electrical system on the cart. Gear on the shaft is a reluctor gear - there's a magnetic sensor running next to it to read the power turbine RPMs. This engine was originally designed to run at 100% gas generator speed, so I've modified the fuel control to add a throttle to it.

Category:

Autos & Vehicles

Tags:

• JFS-100
• golf
• cart
• jet
• turbine

[DaleMcMahan1]

I've got a jfs 100 that I'm installing in a motorcyle. Regarding the egt, did you remove the overtemp switch and install the egt in this port or mount it somewhere else? Did you make the throttle and if so would you sell one to me? As you approach 100% N2 rpm the primary cut off switch should shut down the engine, was this switch disabled or how has this been handled? Any help would be appreciated

Regards

Dale

[JetPropellerLabs]

@DaleMcMahan1 Hello Dale. I did install the EGT thermocouple in the port for the overtemp switch. The first thing I did was remove all the automatic controls from the engine. The N2 is kept from overspeeding simply by the "pilot" keeping his eye on the gauge and reducing throttle if N2 starts flirting with 100 percent. This has not been necessary in actual use as with the gearing as it is in the golf cart, N2 does not overspeed at 100 percent N1 and approximately 80 mph.

[merdr47]

What is your TOT at 100% N1 and does this setup have a load. I am curious what your TOT is at 100% N1 while making 90 hp or so. Nice set up and video. Oh.. where are you measuring N1.

[JetPropellerLabs]

This setup did not load the engine but I have since installed it into a golf cart. I have run it at up to 97 percent N1 and I get about 1450 degrees F on the EGT on a hot day and maybe 125 degrees cooler on a freezing day. EGT is measured after the power turbine. N1 is measured at a 3/8" port on the side of the accessory gearbox. Remove the bolt and you'll see a gear inside. You can use a Red Lion magnetic pickup which will screw into the hole and convert this to an N1 reading.

[merdr47]

Do you Know which Red Lion proximity sensor u used, there are many and my electronics background is lacking. Do not know what Hz is required for that app. I know from my manual that is some fxn of 16330 approx. About 12 rpm of the turbine for 1 of the gear and it sees about 5000 teeth/sec at 70K.....so? HELP!

[JetPropellerLabs]

@merdr47 I believe it was the Red Lion MP37TA1 sensor, it is the only one they make which will screw into the port on the side of the accessory gearbox next to the gear. I will need to either refer to the manual or look at how my gauge is set up to get the information on how to set up the Red Lion counter, and the golf cart is stored at a remote location so give me a couple days. PM me if you still need this info.

[snowman3514]

where did you get your Jfs100 turbine? i have been after one for quite a while

[JetPropellerLabs]

@bmidgley When this early test was filmed, run times were short and the oil system was stock. When I installed the engine in the golf cart, I added an electric oil pump to pull oil from the sump, circulate it through a filter and oil cooler, then return it to the sump. Oil temps get up to around 280 degrees during continuous operation.

[bmidgley]

Have you, or are you going to change the PT oiling from closed splash oil lubrication to a flow circuit type? The PT gear case was designed only to run 5 minutes or so with the close splash oiling before baking the oil. See my vid (using the JFS-100 PT section). With a flowing oil circuit (with ability to cool via main oil circuit) the PT can be run as long as you have fuel. Thanks for the nice vid!

[accuratemike]

JOE! I just bumped into this. Looks great in video. Now I have to look at all of your stuff.