General Interest

632 posts

Expansion Wave Induced Vapor Cone – Explained

ABOARD USS CONSTELLATION (July 7, 1999)– Lieutenant Ron Candiloro, assigned to Fighter Squadron One Five One (VF-151), breaks the sound barrier in an F/A-18 “Hornet”. VF-151 is currently deployed with the USS Constellation (CV 64) battlegroup. U.S. Navy photo by Ensign John Gay. (RELEASED)


An F/A-18 Hornet over the Pacific Ocean, in July 1999. (Photo: Ensign John Gay/US Navy)

Ensign John Gay of the U.S. Navy had just returned home from several months aboard the U.S.S. Constellation in the South Pacific when his phone rang. A reporter for a photography magazine was on the line, hoping to discuss the 2000 World Press Photo Awards. Gay was perplexed: “Who are you and what do you want?” he said. The reporter explained that Gay’s photo had taken first prize in the Science and Technology category, which was news to Gay: he didn’t even know he’d entered the prestigious contest.

A lot had happened when Gay was at sea. But the photo held more surprises than just its global accolades. It captured a moment that was wildly misunderstood by most of the people who saw it—including the photographer.

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Remember Captain Fred? I do!

Captain Fred was a local videographer who made half hour videos of San Diego Aviation subjects.  His TV show was called Captain Fred’s Aviation Theater.  I believe the shows were aired on cable’s public access in the 90s and early 2000’s, on Sunday evenings.  He and his wife Anna were the entire video crew.

We can enjoy his work these days on his Youtube channel.  Well worth taking the time to watch.

Some of us in the club met Fred Province when he came to make a video of our F5B event when we hosted it in 2000 on Fiesta Island.  Unfortunately, I cannot find that video on his channel.

Here are a couple links with information about Fred Province’s life:

Captain Fred 1

Captain Fred 2

Otto Steals the Show with his RC Loon!

Flyguy Promotions received a contract from Wide Angle Group in early June to produce a 10 foot flying Loon based on the Minnesota United Loon logo. The Loon was flown as part of the Major League Soccer (MLS) pregame covered by ESPN. Mike Frandsen, Bob Simon, Dave Encinas and Otto Dieffenbach built the Loon in 5 weeks with first flight on July 10. Emily DeJoode, Manager of Ampdraw Hobbies in Encinitas joined Otto as his far corner spotter for the performance. Three rehearsals and the performance flights were flown on August 8, 9 and 10. FAA and FBI approvals were obtained prior to flight operations.

The performance and project were considered great successes by ESPN, MLS and Minnesota United. 

Alex’s Solo Video

This video is part of Aviator Alex’s continuing adventures flying Radio Control aircraft with Silent Electric Flyers San Diego, and in the air flying Sailplanes with Cypress Soaring! Aviator Alex is working towards eventually becoming a Jet Airliner Pilot, and we have no doubt he’ll achieve his worthy and challenging goal!

Don’t Spill the Beans

This month’s club event is:

Don’t Spill The Beans

Any Airplane Can Participate.

Beans, and holder device provided.

Take off,  climb 100ft,  perform loop or roll and land.

$150 in Cash awarded to top winners! 

Saturday, July 2nd 10:00am

Club meeting, and Lunch to follow.

Long Distance Batteries:

Twin engine aircraft are generally capable of longer range flights than singles. As it is in the real world, so it is for radio control aircraft! Jovi is in the process of building a spectacular DC-3, or C-47, depending on his choice of the final exterior. It brought to mind some adventures I had with one of mine, a Hobby King DC-3 that is sadly no longer active. It threw a prop at about 25′ AGL. Before that unfortunate incident however, it showed it’s long legs:

Here it is leaving New York on a round the world flight.

Heading South first, it recharged its batteries in Rio De Janeiro, Brasilia.

It then turned West, climbed the Andes and eventually arrived at Sydney, Australia.

Continuing West, it stopped in Cairo to top off the battery pack, flying by the pyramids for a look.

The longest leg was across the Pacific, reaching America and finally flying over the Grand Canyon.

I do have to be honest, there were a few more recharging stops.
Bob Stinson

Our New SEFSD Logo

Please meet Felix Dang. Felix is the one who designed our new club badge.
After almost 7 revisions, the board members finally agreed to the version we have today.
Felix has worked for Advance Reprographics for over 3 years now and is our lead designer here.
Thanks Felix, great job!!!
Larry Kosta

OCMA Scale Squadron “Warbirds and Classics”

By Mark Davis
    On the weekend of  June 4th I went up to the Orange County OCMA annual “Warbirds and Classics” event.  From SEFSD field, it’s one of the closest events of this type.  I’m not sure how many pilots were there, but I would guess about 60-some.   They have a nice 60ft x 600ft paved runway, with a large unobstructed flying area.   The event is for scale airplanes, and there were a lot of very large ones there.

    I took my OV-10, and found there was another guy with the same ARF.  The ARF comes as an OV-10D, but he had 1000 hours in the OV-10A in Viet Nam, and so he had kitbashed his into an A version, and made it an exact replica of his plane.   He had a lot of interesting tips and information about the full-scale plane.

   Tony Quist and several other Horizon Hobbies staff pilots were there, flying several of the other Hangar 9 models also.

   I only met a small fraction of the attendees, and missed the evening dinner.  But it was a fun time.  I would highly recommend it.   They do it at the beginning of June every year.   Below are some random photos from the event.

Launch of a Falcon 9 Rocket.

WOW! We just watched a SpaceX Falcon 9 launch at Cape Canaveral! This was the 13th flight for the 1st Stage Rocket which landed successfully in the Atlantic minutes after separation from the 2nd Stage! It was traveling over 27,000 MPH as we lost sight of it above! It’s mission: deliver additional Starlink Satellites! Thank you, Elon!

Design-Build-Fly Competition Report for 2022

By Steve Manganelli

The 26th annual (and first Post-Covid) American Institute of Aeronautics and Astronautics (AIAA) Design Build Fly (DBF) Competition took place April 21st through 24th at Cessna Aircraft’s Wichita KS facility. Ninety-seven teams of Undergraduate Aerospace Engineering Students including teams from San Diego State University (SDSU) and University of California San Diego participated. Myself and Safety Officer Steve Neu have been mentoring the SDSU team since announcement of the rules in early September of last year. Unique about DBF is the rules change every year so there is no way to iterate on your success (or failure). This year’s challenge was to design and build an electric powered R/C model to carry giant syringes and ½ pound chunks of wood 4X4s representing vaccine vials. A further challenge was the vials contained orthogonal 25G shock sensors and had to be deployed on the ground (in a defined area) without tripping a sensor. The deployment had to be after landing from about a 60 second flight which had to takeoff in less than 25 feet! The rules contained a scoring formula that rewarded large numbers of vaccine vials and syringes.

Early in the design stage, we flew the shock sensors in miscellaneous R/C aircraft in order to ascertain 1), if a high G turn would trip a sensor and 2), how many takeoffs, course completions, landings and deployments could be accomplished in the 10 minute allowed window. After a couple of flights, we surmised that If everything went well, (8) ½ pound vial bricks could be deployed in the 10 minutes and all but the tightest turns and the worst dork landings would be under the 5 G limit. The 5G s became moot anyway as the organizers later change the shock sensor to 25 Gs.  The rules specified a minimum of (10) syringes per vial brick, thus 4 pounds of 4 X 4s and 80 syringes became our target design payload. The students then used some simple rules of thumb (cargo weight = everything else weight) to define the required wing area. They chose a low aspect ratio constant chord wing with a tried and true epoxy-carbon tow and vertical grain balsa “I-beam” spar within their foam core wing. The wing was then faced with lightweight fiberglass using the foam cradles as a female mold.

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Horizon Hobby – Great Service!

George Sullivan Writes:

 I had a very good experience with Horizon Hobbies this week. I contacted them because I was looking for a part for the nose gear on my F16. The part was not available to purchase separately from the nose gear. Horizon volunteered to mail me the part free of charge. Great customer service!