Date
1 - 5 of 5
Trim control
|
Elevator trim control
The photos show my spring and roller chain with wheel and friction adjustment screw. To: "Norman Coote" <coote@...> |
|
|
|
Mike Steinsland
Thanks Norm, The benefit of a photo is that I can see more than what the topic is about. Thinks like fuel lines and other controls. Lots of thinking ahead on where to put everything all the while keeping in mind that I will eventually have an instrument panel in the way. I'm giving some serious thought on how to swing it up out of the way so I can get at all of these parts for maintenance Cheers |
|
|
|
Looks great! After you fly it a while start thinking of how I can get the sparrow strainers to adjust and relieve the pressure on the trim wheel so that the elevator is not loaded but neutral. When the strainers are correctly adjusted you can, at that point, loosen the friction lock on the trim wheel and let it free wheel. When neutral for trim you can then remove the trim wheel and adjust for pitch using only the aileron reflexed. The sparrow strainers are then hard wired to the elevator.
toggle quoted message
Show quoted text
Clear as mud? Bruce Crain On Dec 7, 2022, at 5:51 AM, Mike Steinsland <MIKESKUSTOMS@...> wrote:
|
|
|
|
Chris Walterson
Here are a few pictures of what I did for the trim. The one picture shows the pushrods going to the bellcranks. I made the bellcranks I think 1 1/2 inches longer to be less sensitive, and I also have dual tabs a compared to the stock single tab. If you look to the left you can see the single mass balance arm close to the fuselage side. To this I welded a tab and attach the trim control cable to one side. I have a small pulley installed on the canard reinforcement tab on the side of the fuselage. A cable goes through the pulley to allow for the welded tab to go back and forth.
There are small springs attached to both cables to allow for better trim. The trim mechanism is in front of the throttle. Roll it forward, nose down, roll it back , nose up. The cable goes through the mechanism and is pinched so it is positive when the trim is moved. I have the sparrow strainers from the Dragonfly and are set to their specs. On the first flight I set the elevator trim with the wheel and ever since then as Bruce stated I only use the reflexor. The reflexor control is the lawn mower throttle in front of the airplane throttle. Reflexor forward, nose down, reflexor back, nose up. The back knob is the throttle and the red is the turbo boost conttrol. Works great, and the airplane as configured is easier than my Dragonfly to land. Take care---------- Chris -- This email has been checked for viruses by Avast antivirus software. www.avast.com |
|
|
|
James N
Has anyone tried articulating the sparrow strainer and using that as the trim? Hinging them to make them in-flight adjustable would just do Bruce's adjustment, without the trim springs.
|
|
|
