Matronics Email Lists

Needed the microprocessor to have enough outputs to drive my cool led bargraph to show the trim position Smile

Thought of using an Arduino and heavy duty RC servo to create an electric elevator trim for the firefly but never did it. It would be a simple matter though with no gyro required. A pot or momentary ...

I've got to second the lack of the gap seal in the center section of the wing. It may not affect the ground handling much but would certainly not help in the air. I've read a couple of posts which in ...

Back when I was building my firefly, I thought of installing electric trim for an elevator tab. I did some research on RC servos and wind loads. I took worst case scenarios for a trim tab at 90 degree ...

I've added the page from the 447 operating manual that contains the nominal operating temps for the 447. 1200 Deg EGT is max. I've set my Grand Rapids unit to reflect that as Red Line. I normally see ...

I'm running a 447 on my firefly with a 60 inch IVO prop. 6500 WOT is by the book and typically 200 RPM less static on the ground would yield whatever WOT setting you are looking for. That being said, ...

Frank

My Rotax 447 install manual calls for a capacitor across the regulator a minimum of 2000 uf. A greater value is certainly better but the greater the value the larger the physical size. The mu ...

Here's a link to an MGL document that looks like it would apply to most installs that addresses radio/antenna/intercom issues. Since I don't trailer my Airplane and keep it hangared, I opted for a dif ...

The separate spacers were stiff enough to keep the brake disk from getting out of calibration? I hadn't considered that. I thought the spacer would have to be a solid assembly of some type. I guess th ...

Thanks Scott. You've been most helpful. I mis-spoke on the bolt. I meant Grade 8 not #8. They make those bolts long enough already to use as axles and are threaded on the ends but I'm guessing they a ...

Thanks for the help Scott. Pictures are always worth a thousand words in my book. Just a couple questions if you don't mind. Do you use the brakes on your landing rollout to slow down or just on the r ...

It's finally time to stick some brakes on my Firefly and I would like to attempt to use mountain bike brakes. If anybody is currently using that type of setup, I could use a couple of photos of your ...

According to my manual for an EIS 2000, tach setting for Rotax CDI engines is 6. Rotax 912 requires a setting of 1. Most non CDI engines require a setting of 2. Hope this helps.

just started my 3rd season using the book binding tape. No deterioration showing up yet. My plane is hangared though. The tape is cheap and easy to install. As far as carrying your paint trim from win ...

Congrats on the Firefly Purchase. I bought my kit a couple years ago and have not regretted it. I had no prior knowledge of building, covering or painting and was nevertheless quite pleased with my r ...

I just got an Ad from Aircraft Spruce today for a new manufacturer that has some new and reasonably priced LED Nav and Strobe lights. I also have a circuit for the DIY people that might want to build ...

Hello Bill.

Thanks for the kudos on my video. It was my first attempt at using the Windows Movie Maker software that came free on my ancient yet still serviceable Computer.

I believe you are r ...

Thanks John. I'm using the CO2 vest option. It is lightweight enough and not too cumbersome. I agree that if you land any plane upside down, the options are worse in that situation especially in water ...

Yes, I agree, the landing places are few where I live unless I hang around the farmers fields but no fun in that. I'll have to do the best I can in any given situation. It's been many years since I've ...

I thought I would add a video to the available mix. Flight with a Firefly here in Michigan on a cool evening with light winds. We are fast running out of time here in the north. I quit about the mi ...