Elliot Seguin | Does it cool? - Cooling modifications and hiking - Flt 004 - Hakan Modified Lancair @utopiasnow | Uploaded 4 years ago | Updated 5 minutes ago
Hakan calls it a "cowl flare" but whatever you call it I was excited by the chance to finish the first flight card. The goal of this program is to evaluate the custom "fowler" type flaps that Hakan installed on his airplane. But up to this point we had frustratingly been stuck in the traffic pattern trying not to cook the motor.
Besides the obvious the first flight card included a "first look" at the low speed handling chracteristics of the airplane. The concern is that while the flaps may allow the wing to make enough lift to support the airplane at very low speeds the controls may not be powerful enough to control the airplane in this condition. Most obviously this is a pitch problem as the giant flaps are sure to make for large pitch moments. But also the airplane will need to turn (roll/ailerons) and yaw (rudder) at these slow speeds or worse during a go around.
Hakan is an experienced homebuilder so knocking out this small lip on the cowling exit was not a major challengefor him. We added to it by taking advantage of a low "marine layer" day and flying early when the air was still cool.
Yes this mod adds drag to the airplane. But right now highspeed performance is not the main concern.
Timestamps:
00:38 Introduction
02:17 Maintenance Performed Explanation
03:02 MX Performed Briefing
03:37 Cowl Flare
06:00 Wing delam, drill and fill
08:41 Ingress/Engine Start
09:32 Preflight Briefing
20:14 Flight four video
25:49 Post Flight
Hakan calls it a "cowl flare" but whatever you call it I was excited by the chance to finish the first flight card. The goal of this program is to evaluate the custom "fowler" type flaps that Hakan installed on his airplane. But up to this point we had frustratingly been stuck in the traffic pattern trying not to cook the motor.
Besides the obvious the first flight card included a "first look" at the low speed handling chracteristics of the airplane. The concern is that while the flaps may allow the wing to make enough lift to support the airplane at very low speeds the controls may not be powerful enough to control the airplane in this condition. Most obviously this is a pitch problem as the giant flaps are sure to make for large pitch moments. But also the airplane will need to turn (roll/ailerons) and yaw (rudder) at these slow speeds or worse during a go around.
Hakan is an experienced homebuilder so knocking out this small lip on the cowling exit was not a major challengefor him. We added to it by taking advantage of a low "marine layer" day and flying early when the air was still cool.
Yes this mod adds drag to the airplane. But right now highspeed performance is not the main concern.
Timestamps:
00:38 Introduction
02:17 Maintenance Performed Explanation
03:02 MX Performed Briefing
03:37 Cowl Flare
06:00 Wing delam, drill and fill
08:41 Ingress/Engine Start
09:32 Preflight Briefing
20:14 Flight four video
25:49 Post Flight
