Scale Wendell Hostetler 30% PA-28 Cherokee Build
- Thread starter TonyHallo
- Start date
Stevendavis
100cc
Will you be adding some ducts to the cowl openings to slide into those?
TonyHallo
150cc
No, the firewall is the barrier between the high pressure zone and the low pressure zone. The air entering the cowl is slightly higher pressure due to flow through the air (Velocity Pressure), the area behind the will be at lower pressure caused by the lip on the cowl. Air will flow across the pressure barrier. The goal of the ducts is to ensure the airflow is close to the cylinder head or at least I hope! The cylinders are right in line with the openings of the cowl, the only way for air to escape is across the cylinders.
The attached pdf is a log of the Champ in November 2021, it was in the low 70's, great day. This flight was about 8 minutes, there are 2 temp sensors on each head, four total. I'm happy with the results, a photo of the Champ baffle is included below. The ducts on the Cherokee are much better so I expect it will run cooler.
The attached pdf is a log of the Champ in November 2021, it was in the low 70's, great day. This flight was about 8 minutes, there are 2 temp sensors on each head, four total. I'm happy with the results, a photo of the Champ baffle is included below. The ducts on the Cherokee are much better so I expect it will run cooler.
Stevendavis
100cc
That makes sense!!
dhal22
GSN Sponsor Tier 1
WHAT? This isn't going to hover? Jeeze, all this following along for nothing..............
TonyHallo
150cc
Use two SP-RPM sensors, you need to change the channel on one and check a box in the telemetry screen that I forget what it is called. You could add more if you like, once they are found you can edit the name. $20 each, not bad
https://alofthobbies.com/frsky-sp-rpm-smart-port-rpm-and-dual-temperature-sensor.html
alofthobbies.com
https://alofthobbies.com/frsky-sp-rpm-smart-port-rpm-and-dual-temperature-sensor.html
FrSky Servo Channel Changer (SBUS, CPPM)
The FrSky Servo Channel Changer is a tool that allows you to assign channels to SBUS and CPPM compatible servos.
alofthobbies.com
TonyHallo
150cc
Working on the throttle and choke controls. This is the first Walbro carburetor that I have with a spring return choke. I plan to use pull on spring return on both the throttle and choke. Make small pulley out of 3/8" brass rod, the one in the photo will register in the larger choke level hole, the throttle pulley is installed.
