It’s been a year. It’s been a year.

I (Dave) am going to take a break from instructing this year. I will spend more time working on the website, managing inventory and administering the business. I also hope to fly more, particularly free-flying.

Chris Parish will be instructing more students this year. I’ll be forwarding any training requests to him. I’m still working through the list of people who applied over the last year. I know that we won’t be able to train as many pilots as we have in the past, but we aim to thoroughly prepare the few who do train with us.

Going forward, Chris or I will try to answer emails and questions more quickly that I alone have been in the past. I look forward to talking with all of you, and helping you realize the dream of personal flight.

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This probably isn’t surprising anymore, but we’ve basically put the business on hold during this Coronavirus outbreak. Anyone who applies for lessons is put on a list which at this point is about 2 years out, even if we had the whole summer to teach.

I am still selling, keeping people in parts, and performing work on Air Conception motors. The more I familiarize myself with these motors, the more I like them– they’re simple, reliable starters in cold weather, and lightweight while still having the power to lift large pilots. If you haven’t already, visit my shop. I stock commonly-needed parts here in the US for fast/cheap shipment to pilots. If the part requires a custom size or material, I’ll probably have to ship from Europe. Things like Pistons, Cylinders, Seals, Starter parts, etc. are all right here.

If you’re looking to get into the sport, this summer is going to be rough– I don’t know any instructors nearby who are taking students. If you’re a pilot, fly safe, and I hope the warm weather comes soon!

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Reserve Throw Study

Dr. Matt Wilkes generated the most careful study of reserve deployment behaviour I’ve ever seen. Andre Bandarra interviews him in this video, asking many of the questions that frequently arise when pilots talk about this stuff. It’s 30 minutes long and absolutely packed with data, observations, and recommendations. This video probably settles a few campfire bets.

Some of the observations were eye-opening to me, and challenged my assumptions. For example, I’ve been teaching pilots to wind up the throw across the body before throwing the reserve (to give it a hard throw). In the tested cases, this is an unnatural technique. At worst, the wind-up caused a couple of pilots to tangle in their reserve lines or reserve bridle. The study observed that a single, up & backward deployment movement was applied by 70% of pilots regardless of reserve location, and that when the reserve didn’t slide out of its container easily (such as with some underseat reserves), the pilot changed their grip on the reserve handle so that they could pull up & backward harder. Throwing hard is helpful in cases where the pilot is in slow autorotation or otherwise moving through the air slowly. Nevertheless, In the heat of the moment we’re all going to do what feels natural and right, so I’m going to teach to that.

Another fascinating observation made by the study: When the strop between the reserve handle and the deployment bag was too long, the pilot had a hard time extracting the reserve from the container. Additionally, the pilot’s throw became weaker due to the lagging connection between the pilot’s arm and the reserve’s mass. In the study, pilots with shorter arms had difficulty extracting the reserve due to the strop being too long. Contrast this with the scenario in which the length of your reserve strop is shorter than the length you need to pop the pins free of the reserve pin loops, locking your reserve in its container. It’s clear that strop length is an important factor in reserve deployment success.

With just under 1000 hours of flying to date I’ve seen over 30 reserve deployments in the wild, but I have yet to see own. In 2015 I almost threw after 3 cascading oscillations, but I hesitated and instead opted for full-stall-reset, for reasons. I was lucky I had the altitude to waffle in indecision for so long, and the recent practice in full-stalls. One of the recommendations near the end of the video is for pilots to seek out practice in reserve-throw decision-making, throw their reserve in a maneuvers clinic, and remove inhibitions that may prevent the pilot from making that throw decision.

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Summer Update 2019

Flying toward Mousam Lake, near Sanford, Maine.

It happened. Between the new software job I started in February and PPG instructing with the rest of my time, I got waaaay behind on my blogging this year. It’s been an exciting and busy season with lots of flying; not so much communicating. This year, thankfully, I got help! More on that below.

New Pilots

We have a bunch of new Powered Paragliding pilots from this summer: Ross, Starr, Dan, Shawn, Jose. Congratulations to all these pilots, and best wishes this Fall! Some of these pilots will be taking their USPPA written tests and earning their PPG 2 ratings.

If you need a USPPA rating, contact me at dave@schoolofpersonalflight.com. I can witness your demonstrated skills and set up a test for you. I charge for training and teaching, but not the rating.

New Instructor

As the wait-list grew into 2021, I realized I couldn’t do this all alone. In what couldn’t have been better timed, An experienced local pilot professed his desire to instruct.

Welcome to Chris Parish, who is instructing PPG with the School of Personal Flight this year. His passion for the sport and for teaching will make him a valuable mentor.

News Segment

We were on the News this week:

High Pressure: In front of news cameras, Chris coached Jose through his first PPG flight. (snapshot from video by Beth McEvoy, NEWS CENTER MAINE)

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2019 – Weather, Air Conception Parts, Training Info


2019 flying season has almost started. This winter was long and mostly flightless, save for a few diehard days when a couple of us got finger-freezing 5-minute flights. It’s now April, and temperatures are rising while wind speeds are dropping. I predict we’ll be flying regularly by May. Afternoon classes start May 9.

I often look at the Sanford Airport Weather forecasts to get a general sense of the weather around Southern Maine. This past month, pilots have observed that the forecast has been underestimating the wind speeds and gusts speeds, so keep that in mind. My prediction is that weather will follow the model a little better once summer starts. I have a widget for Sanford weather on the Weather page.

April kiting. It was cold, but kiting is athletic enough that we stayed warm. The wind was strong and reasonably smooth. We left before a storm pelted the field with sleet.


Paramotoring has received a lot of interest locally in the past couple of years, and I am now wait-listing students. Be aware that if you sign up for lessons, you probably won’t be starting until May 2020. There’s no deposit or commitment to occupy the wait-list, so feel free to sign up. You’re still welcome to come up and see training in action– it might help you gauge whether this sport is what you’re looking for. I’ll contact you when a space opens. If you find another instructor or school in the meantime, don’t wait for me, go fly!

Online Store

An online store is in the making. I am now stocking hook knives and Powerfloat Rescue Devices, as well as recharge kits for your rescue should it become submersed. I have U-Shaped and 2BSure, and recharge kits for both.

Air Conception Parts

I have become a parts provider for Air Conception motors, and I am stocking parts in the US. If you need anything for your Nitro 200 or Tornado 280 in the near-term, shoot me an email describing the part and I’ll send it along!

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Granite State Sky Riders in the news

Our nearby Powered Parachute friends, the Granite State Sky Riders, started a Fly-In in Berwick, Maine this year. New Hampshire news channel WMUR9 showed up and produced a really nice piece about the sport, with a bit of Powered Paragliding thrown in the mix (thanks to a briefing from local instructor, Johnson Qu). You can watch it here. As I’ve been asked many times before about the difference between Powered Parachutes (PPC) and Powered Paragliders (PPG), you can compare and contrast the sports of PPC to PPG in this 8-minute segment from the New Hampshire Chronicle.

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Local pilots in Red Bull X-Alps!

© Red Bull GmbH.
Eduardo Garza selected for Red Bull X-Alps 2019! (© Red Bull GmbH.)

Since 2013 or so I’ve been following the Red Bull X-Alps race– sometimes from my phone, sometimes from my work computer– watching the dots race over 1000km to Monaco against a map of the Alps. Pilots will be flying as much as they can, but when weather doesn’t allow flight, they’ll be running. I’m really proud that two of our New England colleagues are going to be in the 2019 X-Alps: Eduardo Garza, supported by Bianca Heinrich!

If you’ve followed the X-Alps before, you’re familiar with the degree of mental and physical toughness required to compete. From the X-Alps About the Race page:

From Salzburg, they make their way only by foot and paraglider to Monaco, navigating over 1000km of treacherous alpine terrain. Often covering distances of 100km per day, sometimes more, athletes must combine skill and strategy, while overcoming injury and fatigue. Many will accept defeat and drop out before the end, but a select few will stop at nothing to reach the finish line.

Eduardo is representing his home country of Mexico, but until recently he has held the New England paragliding distance record (only beaten by world record holder, Donizete Lemos!), and both he and Bianca currently co-own the Vermont State record. Eduardo is also an ardent mountain hiker. Bianca will be supporting Eduardo on the flight, which draws on her decorated paragliding experience to develop strategies with the route, logistics and the weather to outfly the competing atheletes and keep Eduardo healthy.

So, congratulations! I’ll be rooting for you Eduardo!

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Tail of the Season

Diana and I in our new SPF shirts (Thanks to Diana and her mom, Linda O’Leary, for making these!)

I sort of spaced on blogging for the past couple months– I’ve been really busy running the school and keeping up-to-date on software engineering (I can’t live on flying alone– yet). I’m considering a vast expansion of the school next year or 2020, but the details and the debt are a little scary. Approximately 120 people asked for lessons or details since this Spring, and I’ve had to wait-list almost everyone. I sold my school motors in the Spring… whoops!

Last month Diana and went to France to visit the Coupe Icare. It’s a free-flying festival (with paramotors too!) attended by over 100,000 people. I rubbed shoulders with the manufactures of our wings and motors, and examined new technology. The crowds were a little overwhelming, and I peopled-out after a collective 2 hours of waiting in various lines. The show was spectacular– I’m not going to post all the pictures, but do look up this event sometime! Before and after the Festival, I flew Annecy and Chamonix, two paragliding sites in the Alps. These are European free-flight hubs. There is plenty of infrastructure for moving pilots around in Chamonix.

A neato electric motor on display at Coupe Icare

A tent from Gin that uses your paramotor as part of the frame.

I didn’t really blog about all the wonderful people I met who came to learn how to fly. Everyone has been enthusiastic about it, and it was fun to watch their skills click. The tandems have been a useful tool for introducing prospective pilots to PPG flight. I’ve been teaching and doing tandems every weekend. I even had the privilege to fly some of my friends, family, and friends’ family tandem and show them what we’re doing up there.

Chamonix launch. Glacier ahead. I was both over, and at one point during our trip, inside a glacier.


Switzerland has a paraglider on their currency.

I’m finding it takes A LOT longer to get you flying around here if you can only take weekends off. Though the 9-day compressed courses weren’t ideal (I want to do 14-day courses next year), they did get pilots up and flying sooner.

Thanks Biddeford! I have fond memories of extracting myself and my wing from these evil plants last year. I am happy to see them go!

The season is coming to an end soon, but I’m still available for Tandems and one-off lessons. On the plus side, the Town of Biddeford just started clearing the Japanese Knotweed off the north-facing kiting hill (just in time for the winter’s north wind).

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Dave’s 10th Anniversary of Flight

I had an awesome 3-stop flight last night for my 10th anniversary of flying. My favorite flights follow the 80/20 rule: 80% adventure, 20% misadventure. Wind was stiff from the West, so I scrapped my original plan to land at the beach, and instead flew to Sanford airport to land and make some adjustments to my motor. I took off again, then landed in the Blueberry Barrens to pick some blueberries. A couple cycling by stopped and chatted about blueberries. I shared with them locations where I spotted others picking blueberries (the berries themselves are hard to see while moving through the air, even at 5 feet).

A PBY Catalina in the background at Sanford Airport during my maintenance stop.

Blueberries in a rare naturally treeless zone of Maine.

Northern Blazing Star from the Kennebunk Plains. It’s a rare and beautiful flower here. Once a year, the Kennebunk Plains burns so that these flowers can germinate (don’t quote me on that lifecycle; I’m not a biologist).

No-wind launching at the Blueberry barrens was somewhat sketchy– The ground was uneven and the dirt roads were rutted. In my rush to launch while nobody was looking, I’m pretty sure I forgot to attach the right speed bar pulley to the wing. Sometimes they fall off on their own, but I think it was a lax pre-flight in this case. The speed bar line swung back and hit the propeller on take off. The propeller suffered minimal damage, but the netting on the lower right quadrant was destroyed (it was an easy fix). Amazingly, the speed bar line wasn’t badly damaged and had lassoed itself safely around a cage spar. I appreciated the reminder that complacency doesn’t care how experienced you are, nor how long you’ve been flying. I waved at the blueberry pickers down below like everything was normal and flew home.


At 300 feet, a familiar apple- or blueberry-cinnammon pie scent was stagnating over the field. I have only once before noticed this pie layer of air, a few years back. I’m not sure what makes it, but it smells great! It only happens this time of year.

Crazy thing– The wind was blowing at least 15 mph at tree-top height. There was no wind on the ground all day.

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July Update

Pushaw Brook near Old Town, Maine.


Motor Maintenance

I helped a friend take apart his motor to figure out why it wouldn’t start. The symptom: The flash-start pull-start wasn’t “flashing,” and the motor wasn’t starting. He had already taken apart, reassembled and replaced the flash starter. We also replaced the carburetor, which is often the cause of troublesome motor issues (but not in this case). Spark plug replaced, gaskets replaced, piston/head cleaned, etc. — nothing standard was fixing the problem.

The folding card table got used, and was surprisingly sturdy.

There was no resistance when he pulled the pull-starter handle. The flash-start mechanism isolates the user from the compression of the engine, but you still feel *something*. We were getting nothing. I hooked up a compression tester: 0 psi compression when we rotated the piston– I’ve never seen that before. We took apart the cylinder a second time and looked at the rings. They were not springing out to contact the cylinder wall, and they were stuck flush(!) with the piston sides, allowing air/fuel mix to easily blow by the piston, completely voiding the combustion chamber. The flash-start needs this compression to wind its “flash” spring.

click for larger picture.

I don’t know if the motor would have started even if we could get the first bang to happen. Even if it did run, the power would be extremely lacking. I’m not sure exactly what would happen with so much blow-by (combustion gases migrating from the front of the piston to the crankcase). My friend has a new piston on the way.

The most common cause of stuck piston rings is excess heat when the engine is running, usually due to a lean condition. Not using a 2-stroke lubricating oil might also cause something like this to happen. In my friend’s case, I don’t think he ran it too hot; there was no other indication of heat damage (and perhaps someone with more experience reading pistons can tell me what the picture of the piston tells them). There was an amount of carbon built up on the piston and head consistent with 30 hours of use. He might be changing oil brands though, just in case.

First Flight

Tim got his first flight at the end of June. After 6 towed launches, he was more than ready for motorized flight. His first flight was on the full Moon, so I had him fly a few more laps than usual for a first flight so he could take in the scenery. He’s had a couple more since then, but we ran into issues with his used motor: it wouldn’t shut off when he landed– the kill switch wasn’t working. Now he gets to learn about motor maintenance.

Tim (on the left) on his first paramotor flight.

High humidity and temperature

Wood Island lighthouse.

Temperatures have been in the 80s and 90s over the 4th of July weekend. We flew a few days, and those launches were brutal! There was no wind to help, What little wind we did receive was switching directions, and we ran into issues with the high density altitude. Once off the ground however, flying was calm and warm. I even flew a tandem (one successful launch, one non-successful), which was surprising that we could launch in this stuff.

I’ll briefly explain Density Altitude. Think of it as “the altitude that the weather conditions make it feel like.” High Density Altitude means the conditions are making it seem like you’re launching at a high altitude. Low Density Altitude makes it seem like you’re launching at a low altitude. Note, it’s not (High Density) Altitude, it’s High (Density Altitude)– See what I did there?

Hypothetically just varying altitude, planes have a harder time launching at Denver (5000 feet above sea level, more or less) than in Kennebunk (10 feet above sea level). This is because, assuming equal temperatures and humidity, the air at 5000 feet is less dense than the air at sea level. Less air density at high altitude results in less lift force, and fewer oxygen molecules for the motor to burn. You end up needing to run faster to get the same lift, and at the same time the motor produces less power than it normally does. Mostly it’s the running that sucks.

Besides high altitude, two other things can make the air less dense: High Humidity and High Temperature. The result of higher humidity or temperature is the same as the result of high altitude– faster run, less power from the motor.

Temperatures and Humidity have been high, but if you manage to get yourself off the ground, don’t come down until you’ve had a beautiful long flight! Pictured here: A civil war monument (maybe?) on an island.

In a nutshell:

High Temperature AND High Humidity -> REALLY High density altitude. Launches will be hard.
either High Humidity OR High Temperature -> SOMEWHAT High density altitude. Launches will be somewhat difficult.
65ºF temperature, 50% humidity -> density altitude feels approximately like the actual altitude. launches will be easy.
Low Temperature AND/OR Low Humidity -> (NICE!) Low density altitude. Launches will be really easy.

Pilots wishing for wind on a hot and humid day.


I finished the USPPA Tandem Trainee program– Thanks to all my test passengers, especially Chris Parish, who was in the seat for 15 of my test flights! I am now a Tandem Foot-Launch PPG Instructor. I’m excited to add this new dimension to training. Now your first solo flight doesn’t have to be your first-ever flight.

If there’s one thing I’ve learned about doing Tandems in Maine in the summer, it’s that our summer’s high Density Altitude is not helping. If you’re going to fly with me this summer, you’re going to need to run hard for at least 30 feet. To be on the safe side, I’m not taking anybody over 200lbs until I’ve had a chance to test a heavier passenger who has flying experience. I’ve had my first tandem flight attempt during a windless, hot and humid day wherein the motor was not producing enough power to lift us off the ground. Earlier in the evening, I had a marginal launch that took ages to gain altitude.

I’m using an Air Conception Nitro 200 for tandems. It’s adequate, but a more powerful motor would help, so maybe next year I’ll be wearing an Air Conception Tornado 280 for tandems. However, I really like that I have a motor that I can fly solo, and then also use the same motor for tandems. I also like that the Nitro 200 is so light on my back. I like it so much that I have a brand new electric-start, clutched Nitro 200 coming to me in the next week. I may use it for tandems (that was my intent when I ordered it), but I would consider selling it brand new to a former student (warranty included).

The Tandem wing (MacPara Pasha 6 42m with T-Ride risers) has been amazing! It’s like a giant EN-A-rated school wing that rises easily and points straight. I think I’ve flubbed one launch in the 27 I’ve done so far, which is all the more amazing since most of them were done in no wind. This wing has our backs.

Interesting observation: Flying the 42m tandem wing with a 130-lb passenger and my 185-lb self results in the same fuel consumption as when I fly a solo 20m wing; we just fly at a little more than half the speed.

A photo from a 70 minute Cross-country tandem paramotor journey. (photo by Diana McNulty)

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