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REV 2.4 - Wed Aug 10 18:49:00 2011

Edmonds
Deltie
13326 Preuit Place
Herndon, VA 20170-4341
 
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SPECS: 16.5" x 8.87" - 0.17 oz
ROCKSIM FILE: MISSING - please submit here
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: 1/2A3-2T, A3-4T

Rating
(by Paul Gray)

Background

The Edmonds Deltie is one of the most popular boost gliders, and with good reason. The glider is well designed, and it has a nice style to it. It can be assembled and ready to fly in a very short period of time. Considering the fact that the glider only weighs around five grams, it is capable of staying in the air for a long time.

Construction

The glider portion of this model is made of very light contest grade balsa. The parts are laser cut, and they fit together like a jigsaw puzzle. I recommend building the glider portion with Titebond for quick drying as well as extra strength. The kit is supplied with very informative and detailed instructions that walk you through the entire process of building the glider and the pod. When constructing the glider, be very careful that you do not glue anything to the table. It's an easy thing to do if you don't watch for it. The light weight, low density balsa is also fragile, so handle it carefully.

When you finish putting the glider together, I recommend using some very fine sandpaper in order to sand the balsa wood smooth and to round the edges of all parts. This will make it more aerodynamic. Again, remember that this is fragile balsa wood. Handle it carefully.

The glider is boosted into the air with a motor pod that is 13 mm in diameter. The parts for this pod are supplied in the kit. The only flaw of this kit was found here. There was no motor block for the pod. However, this problem is easily fixed since 13 mm motor blocks are available from Estes or Apogee Components.

The pod has a small streamer attached to a Kevlar shock cord as its recovery system. When working with it, I recommend installing it and preparing it according to the instructions. Many people tend to add a longer shock cord or a longer streamer. If you do that, you may encounter a pod/separation failure in flight known as a "Red Baron." The glider gets tangled in the recovery device of the pod, and the two fall to the ground together. This may or may not damage the glider, but in competition, a Red Baron is an automatic flight disqualification (I speak from experience) whether it is damaged or not.

Flight

Before you launch your glider into the air, you will need to trim it. The instructions have you mark where the center of gravity should be located on the glider when it is completely built. Use the trimming clay supplied to add any mass at the front or the back of the glider in order to get the glider to balance at the mark that you made before you built the glider. Test fly it by throwing it with your hand several times until the glider flies straight. You will also want to add mass with the clay to one side of the glider so that it will turn in circles when glides down. Otherwise, the glider will fly straight from a high altitude and you will not get it back, no matter how far you go to chase it.

When you load the glider with the pod attached onto the pad, you will need to clip a cloths pin onto the launch rod so that the pod can rest on it. Then hook the glider onto it so that it fits loosely, but securely rests on the hook of the pod. Another cause of Red Barons is the glider hooking onto the pod too tightly, so check this before you go up.

The pod will take any 13 mm motor. However, I would not recommend using an Estes A10 or an Apogee B7. Those two motors have too much thrust, and would probably shred the glider. The Apogee A2 and B2 10.5 mm motors are great for this glider. They allow a long burn which provides lower amounts of thrust and a smooth boost to a higher altitude. Depending on how well you trimmed the glider, it should stay up for a long time. It's a good idea to have two people recover this thing, with one person watching the pod and the other watching the glider.

Grades

Design: A+
Construction: A+
Flight: A+

A fun to build and fly glider with perfect A+ ratings. Don't let this kit ever pass you by.


(Contributed - by Alan Rognlie) 

[Rocket Pic]I am extremely impressed by this kit. Good materials and excellent laser-cut parts yield a fast-building sport model with very good competition potential.  The glider itself is made up of only eight pieces of 1/16" balsa - wings, elevon, fuselage, tip plates and nose reinforcements. The pieces are almost self-jigging and go together very quickly. Even a slow builder like me can put it together in an afternoon using yellow carpenter's glue - complete with fillets. ;-) Rob does NOT recommend airfoiling or rounding anything, so it's almost a 'shake the box' build-up (model railroading kit term <G>). I must admit that I'm planning to try *some* sanding on my next kit - just to see what effect (if any) it will have on the glide. The only shortcoming I see in this kit is failure to provide an engine hook. Per the instructions, motor retention is accomplished by taping the motor casing in place with masking tape. I prefer more positive location and retention, so I'm adding a motor hook (trimmed to avoid exhaust gas impinging on the retainer) and engine block to the pop-pod on mine. Outside of that one minor quibble, I find this to be an absolutely outstanding kit and a great introduction to boost gliders. Check the launch reports for results, but so far this looks like a real winner! 


Rating
(Contributed - by Neil Thompson)

Rocket Pic Brief:
This is a very nice kit by Edmonds Aerospace. The pop pod comes back on a streamer, and the deltie glides back.

Construction:
The kit contains:

  • 1 tube and a lot of little balsa parts, all very neatly laser-cut.

It was very easy to build, fitted together like a jigsaw puzzle. Everything fits together nicely, and everything was laser-cut. You just have to have a little glue and an hour or so.

Finishing:
Rob Edmonds recommends you use markers, so I did. It looks very nice with orange, yellow and green highlighters. Do not use paint.

Construction Rating: 5 out of 5

Flight:
I flew it 4 times. Once it separated at apogee, but the ejection charge had not fired; so the pop pod tumbled about 100 feet, and then popped. I used half a square of wadding, but that is all you need. Once I forgot it entirely while half prepping the glider, half keeping those idiotic 5 year olds from stepping on my rockets. Those kids were crazy. Once I had to rip my modified Echostar out of the hands of one of those mental little kids; and there had to be 3 dozen of the little devils. The RSO and the RCO were yelling over the loud speakers "DO NOT TOUCH THE ROCKETS".

Then my modified Echostar flew, and that demented little kid tried to race me to get to my own rocket. I do not think I have ever run faster than when I was trying to rescue my rockets from these un-supervised morons. I do not know where their parents were. Once some kid grabbed some super-detailed scale model and started running with it. He almost tripped over the parachute, but luckily the unfortunate owner grabbed his model and took it off him. WHEW! Anyway, my deltie flew straight every time I launched it, and once it caught a thermal and flew all the way to the parking lot and hit a car!

It was packed there, it was Space Day 2003, and the rocket landed right in the middle of the cars. I would have wasted half the day looking for it, if some nice stranger had found it sitting next to his car!

Recovery:
Flew well every time. I always had my eye on the glider, so I had to search for my pop-pod after every flight. Every time, though, somebody found it next to their chair, or where they were looking for their rocket, or just sitting in the field waving its little streamer.

Flight Rating: 5 out of 5

Summary:
Great rocket. I cant wait until the 18MM version comes out.

Overall Rating: 5 out of 5


Rating
(Contributed - by Kris Henderson - 04/26/05) Edmonds Deltie

Brief:
This is a boost glider that literally takes minutes to build and isn't all that expensive.

Construction:
The kit comes with a body tube for the engine and pop pod recovery device (streamer), three main body pieces, balsa nose cone, and clay for weighting one fin down to enable it to circle around your launch site instead of taking off a couple miles down wind.

The directions were extremely easy to follow and the entire kit was insanely easy to put together. You almost didn't need the instructions. All of the balsa pieces are laser cut and look very sharp. It's just like putting together a jigsaw puzzle. All I used to put it together was CA glue and some markers to add some of my own flavor.

PROs are that all parts are well cut, easy instructions, and a very basic design so anyone of any ability could piece it together in no time. There aren't any CONs other than that it is pretty delicate. I wouldn't even recommend sanding the balsa at all.

Finishing:
NO PAINT! It adds way too much weight. This is just a little rocket!

Construction Rating: 4 out of 5

Edmonds Deltie

Flight:
Well, before you fly it you really don't know how much clay to use to prevent it from taking off down wind. My first flight I thought was set up perfectly. I had it balanced just like the instructions said but it still flew at least 250 yards over a fence and into a baseball field nearby. And that was only on a 1/2A! I got it back and of course added more weight to the fin. The second flight proved to be still too light on the clay so I added more again. While testing it out by just throwing it gently to see how well it turns, it landed in the grass and snapped just behind the nose area which had to be glued back together. It flew again and was much better, however, it really didn't catch the wind very well. It actually fell into a flat spin for a good 4-5 seconds before it actually started flying. Almost like it was too light! I had really mixed feelings about this kit at this point. It got to be way more frustrating than I thought it would be.

Recovery:
The pop pod streamer was constantly tangling but the tube/nose cone was light enough to safely tumble by itself if it had to. And of course there was the whole glide recovery thing too. That's another job all together.

Flight Rating: 3 out of 5

Summary:
It was not too bad to this point, but that's about as good as it is going to get. The customer service part was absolutely downright terrible--and I don't mean from the hobby shop I bought it from--I mean Edmonds, the manufacturer! I ordered two of these kits 2 weeks before Christmas in hopes of giving one each to my daughter and father so they could build and fly them together while we were home on vacation. Well, both packages were missing the main body tube. How can you miss packing such a thing as the body tubes in both packages? To make a longer story shorter, I didn't get the replacement pieces until nearly March. That's right, March! The online hobby shop I ordered it from no longer carries Edmonds supplies either. I don't think I'd waste my time with Edmonds gliders anymore anyway. They might be easy and convenient to build, but they have absolutely zero durability. It broke twice in the same spot from just me tossing it to see if it glides.

Overall Rating: 2 out of 5

[Submit your Opinion]

GUEST's OPINION:
02/06 - "I built a Deltie in January. Flew it Feb. 21'st , waited until late afternoon when the wind died down. My 6 year old son pushed the launch button on the first launch with a 1/2A4-3. Great boost, we got so excited trying to time the glider we lost site of the booster, and when I glanced at the stop watch and looked back up the Deltie glider was gone too! My son had picked up an over-flying light plane and thought it was the Deltie! After about 20+ minutes searching the big cow field we found the glider due to my son's imaginative magic marker color scheme! Then on the walk back to the pad we stumbled upon the booster! (must be living right) Two more flights thiw evening with the same engine. The second one gave a 40+ second glide in beautiful slow circles over the field. On the third flight something happened upon ejection and the booster and glider appeared to be coming down together, but in a second or two they separated with the glider pointed straight down! It quickly swooped to nice level flight and resumed it's beautiful big circles for a good 32 second glide! Fun~! PS: Deltie Thunder under construction ...stay tuned~!" (H.W.H.)

GUEST's OPINION:
08/03 - "instead of newspaper, i used waxed paper. this worked well, as it would come right off. leave the little red plastic thing that holds the rear piece on right on for 12 hours at least." (N.P.T.)

GUEST's OPINION:
10/00 - "Spread newspaper on your building table when assembling this model. That way, if you do glue it to something, it's the paper (easily removed) instead of the table. Rob Edmonds recommends not painting the glider to save weight, so I didn't. I did, however color the booster with markers. I'm glad I did, because a booster this small is hard to spot even in short grass. I colored it bright red, and had no trouble finding it. This was also my first boost glider. The directions were very easy to follow. Per directions, I did not sand the balsa, and I got a 60 second glide on my first flight." (D.K.)

[Enter Rocket Specific Tip]

SPECIFIC ROCKET TIP:
"" (x.x.)

[Enter Flight Log]
Date Name Motor Ejection/
Altitude
Wind Notes
02-18-2007 Jake Alexander Est SU 1/2A3-2 Didn't Record 10+ mph winds - 1st contest flight; got 50 seconds.
02-18-2007 Jake Alexander Est SU 1/2A3-2 Didn't Record 10+ mph winds RIP - 2nd contest flight. Got something like 27 seconds, but was DQ'd for pod recovery Status: Retired
10-17-2009 Matthew Bond Est SU 1/2A3-2 Apogee - Perfect 10+ mph winds Event: BRB Regional #2
002 - First Flight! 1/2A Boost Glider competition. Quick straight boost, arced over at the top of the coast. Good separation and transition to glide. Nice performance, suffered a bit in the heavy winds. No damage, ?? sec duration.
10-26-2000 Dale Emery Est SU A3-4 Didn't record 5-10 mph winds - A great flight and glide.
03-04-2000 David Fergus Est SU 1/2A3-2 Just Before Calm - good flight, great circular glide
04-01-2000 David Fergus Est SU 1/2A3-2 Just Before 0-5 mph winds - good flight, great glide; ejection charge too strong for shock cord/nose cone attachment, which separated.
06-03-2000 David Fergus Est SU 1/2A3-2 Just Before 0-5 mph winds - good flight, great glide; some damage to glider hook
05-18-2008 Brian Guzek Est SU A3-4 None - Unknown 5-10 mph winds Event: Reach for the Sky XX
Reach for the Sky XX 1/2A BG - Used 15in piston, caused glider separation on pad.
05-18-2008 Brian Guzek Est SU 1/2A3-2 Apogee - NC Up 5-10 mph winds Event: Reach for the Sky XX
Reach for the Sky XX 1/2A BG - Great flight, 19s.
08-20-2006 Kyle Hancock Est SU A3-4 Apogee - NC Up Calm - NARTREK Silver
02-21-2006 Hank Helmen Est SU 1/2A3-4 Apogee - Perfect
(150 ft)
0-5 mph winds - Beautiful, but wrapped shock cord around streamer. Streamer did not deploy, from booster stayed rolled in cord, no damage! good long OOS glide on Deltie, found it later in same field~!
02-21-2006 Hank Helmen Est SU 1/2A3-4 Apogee - Perfect
(150+ ft)
0-5 mph winds - Actually second flight of the day. Great Boost. Long 40 second slow circling glide on Deltie. Booster recovery good. upon inspection shock cord tore through upper tape binding. Quickly repaired with scotch tape for next launch.
03-11-2006 Hank Helmen Est SU 1/2A3-4 Apogee - NC Down
(130 ft)
Calm Event: RAF Meet
- First Ruckersville Area Flyers Meet. Another good flight on this little glider. Nice circle flight in glide Deltie Landed only 12 inches from booster!
08-21-2006 Hank Helmen Est SU A10-4 Apogee - Perfect
(133 ft)
Calm Event: Evening Launch
- Straight boost, good fire due to Low evening light! Long 45 second + glide in lazy circles. Landed in North cow field. Recovered by William after climbing cattle fence.
03-25-2007 Hank Helmen Est SU A10-3 Just Before
(427 ft)
0-5 mph winds Event: 1st Spring Meet
- Good straight boost. Almost lost site of seperation due to evening light conditions. Large tracking team recovered both booster and glider. Glider made numrous large circles for 30 seconds or more.
10-15-2000 Daniel Kirk Est SU A3-4 Apogee - Perfect 0-5 mph winds - Perfect flight. 60 second glide.
05-15-2005 Mike Kiss Est SU A10-3 Just Before 0-5 mph winds - Beautiful Red Baron, Textbook case
05-15-2005 Mike Kiss Est SU A10-3 Apogee - Perfect 0-5 mph winds - Great release at apogee this time, glided flat and straight downwind and played in a few small thermals, seemed like forever, recovered about 200yds from pad, nice little kit
05-20-2006 Mike Kiss Est SU A10-3 None - Glider 5-10 mph winds - Good boost, good release, poor glide, glider has become slightly warped and spiralled down quickly, no damage
02-09-2006 Mal McClenaghan Est SU 1/2A3-4 None - Glider 0-5 mph winds - Not a recommended motor for this glider. It will give you less height than the A3-4T, but the 4 sec delay on the 1/2A3 is too long. Watching the Deltie fly into an 8kmh (5mph) wind without moving is quite amazing.
08-26-2006 Mal McClenaghan Est SU A3-4 None - Glider Calm - First flight after transit damage repair. 1 minute 15 second glide.
05-13-2006 Mal McClenaghan Est SU A3-4 Just Past (1-2sec) 0-5 mph winds RIP - First flight for our Deltie. Built entirely stock. Spectacular 2 minute + glide. Lost in a yard or on the roof of a house near the park. Status: Lost
06-16-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect 5-10 mph winds Number 1 - Dove, 11 sec
06-16-2001 MikeyR Est SU 1/2A3-2 Just Past (1-2sec) 5-10 mph winds Number 1 - Red Baron, 8.3 sec.
06-16-2001 MikeyR Est SU A3-4 Apogee - Perfect 5-10 mph winds Number 1 - Shallow dive, 19.66 sec.
06-21-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect Calm Number 2 - Steep dive, 6.9 seconds
06-22-2001 MikeyR Est SU 1/4A3-3 Just Before 5-10 mph winds Number 2 - Red Baron!
06-22-2001 MikeyR Est SU A3-4 Just Before 5-10 mph winds Number 1 - Nice glide. 80.38sec.
06-25-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect 0-5 mph winds Number 2 - Steep dive, 10.68 sec.
06-25-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect 0-5 mph winds Number 3 - Less stall, 20.09sec.
06-25-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect 0-5 mph winds Number 3 - Stall, 13.04s
06-26-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect Calm Number 2 - Steep dive again.
06-26-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect Calm Number 3 - Nice glide, 26.19 sec.
06-27-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect Calm Number 2 - Still dives, 13.15 sec.
06-30-2001 MikeyR APO SU A2-2/Est SU 1/4A3-3 Apogee - Perfect 0-5 mph winds Andrew 1 - Nice flight. Andrew won B-BG
06-30-2001 MikeyR APO SU A2-2/Est SU 1/4A3-3 Apogee - Perfect 0-5 mph winds Number 3 - Excellent flight and glide. Won 1st place in boost glide.
06-30-2001 MikeyR Apo SU B2-3 Apogee - Perfect 0-5 mph winds Andrew 1 - Another nice glide. Andrew won!
07-28-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect 0-5 mph winds Number 3 - Nice glide. Some stalling.
07-31-2001 MikeyR Est SU A3-4 None - Unknown Calm Number 3 - Ejected motor. 9.87 sec duration
08-04-2001 MikeyR Est SU 1/4A3-3/APO SU 1/2A2-2 Apogee - Perfect 0-5 mph winds Number 4 - Perfect glide.
09-15-2001 MikeyR Est SU 1/2A3-2 Apogee - Perfect 0-5 mph winds Number 3 - Duration 17.97 sec.
01-26-2002 MikeyR Est SU 1/2A3-2 Apogee - Perfect 0-5 mph winds - OK glide
01-26-2002 MikeyR Est SU 1/2A3-2 Apogee - Perfect 0-5 mph winds -
05-25-2002 MikeyR 2x Est SU 1/2A3-4 Very Late Calm - Need changes to the idea of a clustered boost glider.
05-25-2002 MikeyR 2x Est SU 1/2A3-4 Very Late Calm - Only one motor lit.
06-07-2002 MikeyR 2x Est SU A3-4 Very Late Calm - Didn't separate.
07-04-2002 MikeyR 2x Est SU A3-4 Very Early 0-5 mph winds -
08-03-2002 MikeyR Est SU B4-2 Apogee - Perfect 5-10 mph winds Andrew 1 -
08-03-2002 MikeyR Est SU B4-2 Apogee - Perfect 5-10 mph winds Andrew 1 -
08-03-2002 MikeyR Est SU B4-2 Apogee - Perfect 5-10 mph winds Number 2 -
08-03-2002 MikeyR Est SU B4-2 Apogee - Perfect 5-10 mph winds Number 4 -
08-03-2002 MikeyR Est SU B4-2 Apogee - Perfect 5-10 mph winds Number 4 -
06-30-2001 MikeyR APO SU A2-2/Est SU 1/4A3-3 Apogee - Perfect 0-5 mph winds RIP Number 1 - Nice flight. Flew away for a good time. Status: Lost
08-03-2002 MikeyR Est SU B4-2 Very Early 5-10 mph winds RIP - Status: Lost
12-02-2006 Mark Muir Est SU 1/2A3-4 None - Glider 5-10 mph winds - 4 seconds was too long, 2 secs was just right
12-02-2006 Mark Muir Est SU 1/2A3-2 Apogee - NC Up 5-10 mph winds - Nice 2 sec delay. Flew well in a steady wind.
12-02-2006 T Muir Est SU 1/2A3-4 Very Late 5-10 mph winds - Nose snapped on first trim test. Repaired. First flight went well
12-02-2006 T Muir Est SU 1/2A3-2 Apogee - NC Up 5-10 mph winds -
07-30-2007 Chan Stevens Est SU A3-4 Just Past (1-2sec) 5-10 mph winds Event: NARAM-49 A-BG
- Timers lost it at 98 seconds, actual closer to 120.
06-21-2003 Neal Tompson Est SU 1/2A3-2 Apogee - NC Up Light winds N.T - Built this 2 night before and gumping about wanting to fly it, but not having a feild or many engines. I checked the Internet, and there was Space Day 2003! bought some A3-4ts and found a 1/2A3-4t. Had Fun!
06-21-2003 Neal Tompson Est SU A3-4 Apogee - NC Down Light winds N.T - Caught thermal hit car, no damage to glider. Shock cord came loose.
06-21-2003 Neal Tompson Est SU A3-4 Just Past (1-2sec) Light winds N.T - Ejection a little scary, but it ended up gliding for a REALLY long time.
06-21-2003 Neal Tompson Est SU A3-4 Very Late Light winds N.T - Glider came off before ejection, not very long glide
02-19-2007 Gene Wolski Est SU 1/2A3-2 None - Glider Gusty Event: Pole Green Park
- NARTREK Silver glider flight - 46 seconds.
02-19-2007 Gene Wolski Est SU 1/2A3-2 None - Glider Gusty Event: Pole Green Park
- 38 seconds - good flight.

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