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REV 2.4 - Mon Aug 16 17:25:38 2010

Estes
Eagle Boost Glider
P.O. Box 227, 1295 H Street
Penrose, CO 81240
(719) 372-6565
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SPECS: 24.8" x .74" - 3.4 oz
ROCKSIM FILE: MISSING - please submit here
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: B4-2, B6-2, C6-3

Rating
(Contributed - by Joe Policy - 04/28/05) Estes Eagle Boost Glider

Brief:
The Estes Eagle Rocket Boosted Glider is an easy to build E2X level rocket that is fun to build and even more fun to fly.

Construction:
The kit includes:

  • BT-20 Engine Tube with Eagle decal already applied
  • Engine block
  • Engine hook
  • 12" boom
  • Red plastic nose cone with insert
  • 2 pieces clay weight
  • 1 large and 1 small steel ball for glider cone weight
  • Rubber shock cord
  • 30" plastic streamer
  • 2 pieces red vinyl tape
  • Black glider nose cone
  • Glider carrier
  • Fuselage
  • Glider hook
  • Tail adapter
  • Heat reflective tape
  • Horizontal stabilizer
  • Vertical stabilizer
  • Wing with Eagle decal already applied
Estes Eagle Boost Glider

You start by gluing the engine block inside the engine tube, then insert the engine hook and glue the glider carrier over the hook. The instructions recommend using plastic cement, but I do not trust cementing plastic to cardboard, so I opted for 5 minute epoxy. I believe CA would have worked fine as well. You then wrap a piece of red vinyl tape around the exposed cardboard to finish off the engine tube assembly.

The red nose cone is for the engine tube. You stuff one of the pieces of clay into the nose cone and then glue on the insert with plastic cement. The shock cord is the new rubber band type that Estes has switched to. I just do not trust them, so I used Kevlar® on the tri-fold mount with a piece of elastic tied to the Kevlar®. The streamer is then attached to the shock cord and the other end to the nose cone. This completes the engine tube assembly.

The black nose cone is for the glider. It gets two steel balls inserted into it with a small piece of clay to hold the balls in place. The nose cone is glued to the end of the fuselage. I had a little problem here because the end of the fuselage goes into the clay of the nose cone. I was a little concerned because the instructions tell you to put the plastic cement on the part the goes into the clay. I test fit the fuselage and only put glue on the parts that did not touch the clay. It was a fairly tight fit to get the nose cone all the way on, but was fine once the glue set up.

You then insert the tail boom into the fuselage. Follow the instructions carefully as the boom can go in two ways but only one is correct. You are then told to use plastic cement to glue the fuselage to the boom. I opted for CA instead since the boom is some type of carbon fiber and I wanted a good solid connection. The tail adapter is then glued to the other end of the boom, and again, I used CA. The wing saddle has double stick tape which you peel off the outer covering to expose the sticky side. I added several small drops of thick CA to the tape around the edges which I think will help hold the Styrofoam wing in place in the event of a hard landing. The glider hook is glued to the slots in the wing.

The tail adapter also has double stick tape, which I also strengthened with CA. The horizontal and vertical stabilizers are just white Styrofoam with no decals. The instructions tell you to color the horizontal stabilizer with a black marker. I used a wide tipped Sharpie marker, black on one side and red on the other. I also colored the vertical stab as well. Once the horizontal stab is in place, you then need to attach the reflective tape to the top of the horizontal stab. This is to help reflect the heat from engine exhaust and is a nice touch. Once the vertical stab is in place, you take the remaining piece of red vinyl tape and wrap it around the front edge of the stabilizer. I believe this is to help strengthen the joint.

Lastly, you just need to balance the glider. The bottom of the wing has two red dots which are the balance points. You just add clay to the front of the fuselage until you can balance the glider on your finger. I do not like the look of gray clay stuck in the front of the fuselage, I would have preferred that there be a container of some sort to hide the clay, I may add something later if it becomes a problem. It definitely detracts from the appearance.

Finishing:
No finishing is required. You can opt to use a marker to color the horizontal and vertical stabilizers. I would have liked to seen decals for both to help match the rest of the glider. There needs to be a better way to add clay to the front of the rocket for balancing.

Construction Rating: 4 out of 5

Flight:
The first flight was on a B4-2, the smallest recommended motor. The whole unit had a fairly straight flight to about 250 feet. Good separation on the booster but the glider came down fairly steep and hit hard on the grass. It did not do this when I made my "hand tossed" test flights. Fortunately, there was no damage. The booster came down quite nicely on its streamer. It's hard to follow both pieces when you launch alone. I removed some nose weight for the second flight on a B6-2, this time the glider came down much more gently. However, it did not fly in a circle as mentioned in the instructions. I went all out on the third flight with the maximum recommended motor, a C6-3. This time, the unit reached almost 500 feet and the glider came down a long way from the pad. Not sure why it is not circling, so I will have to play with it some more.

Recovery:
Aside from the fact that the glider never did circle, it was still fun to watch. Just make sure you balance the glider properly before you launch and you should have no problems. The booster section had perfect landings each time on the streamer with no problems.

Flight Rating: 4 out of 5

Summary:
This is a fun rocket to fly and it is very fast to build--this one would be great for kids. The decals are impressive and the overall quality is good for an E2X rocket. I think decals for the stabilizers would really have set this rocket off.

Overall Rating: 4 out of 5

[Submit your Opinion]

GUEST's OPINION:
03/06 - "P.S. I forgot to mention - the directions suggest coloring the stab with a marker. I tried a Sanford Permanent Marker (Magnum 44) but it dissolved the foam. I switched to a Sharpie, and it was fine." (D.K.)

GUEST's OPINION:
02/06 - "I’ve never had a knack for hand-launching gliders, so I’m never quite sure if I’ve trimmed them right. I had more trouble trimming the Estes Eagle than most gliders. Even after adding all the included nose weight, it still seemed to stall, but sometimes it would appear to recover just before it reached the ground. The slightest cross breeze would send it cart-wheeling sideways. The Eagle boosted straight on a B6-4, and ejected horizontally at apogee. The glider stalled and dived, stalled and dived all the way down. It hit the ice nose first, bounced, and was recovered with no damage. The shoulder of the booster’s nose cone was still attached to the shock cord, but the rest of the cone was missing. The plastic cement joint had failed. I've cloned older Estes boost gliders successfully, but I've been less than impressed with their recent gliders. Edmonds gliders perform better, and are easier to build and trim." (D.K.)

GUEST's OPINION:
06/05 - "I tried the Eagle, the first time, on an A engine. The tail boom came loose, but didn't come out. That's how I discovered the "model glue" instructions were incorrect. I read one of the flight logs where the owner blamed the C engine. I'd look to the glue. The main body strut is pultruded carbon fiber -- just like that used for arrow shafts. The gluing techniques are, therefore, just the same. CA is good, but epoxy is better. There was another minor problem with the Eagle. The engine melted a small crater in the wing just over the nozzle at the rear of the wing. Estes doesn't tell you to tinfoil cover this area, but you should. I cut a small square out of a Coke can and epoxied it over the crater. I have had no problems since. When I reassembled it, my CA grabbed too quickly, leaving just a hint of twist in the tail, from the boom not being straight. What a lucky accident, when I tried it on a B engine. I got really decent altitude, but the chase was VERY short because of the tight circling done by the glider. It was a short walk, despite the breeze. The Eagle has little cardboard, and no wood. It is thefore one of the few boost gliders that I fly in a drizzle, without concern. However, I'm seriously considering substituting a small chute for the stock streamer. The booster unit hits hard enough to drive mud or dirt into the tube. If it landed on tar, I bet it could bend the hook. Overall, this is a great kit. The build is very quick, it flies high, and glides well with a minimum of trimming. I'd recommend it as a first boost glider for anybody." (J.W.C.)

[Enter Rocket Specific Tip]

SPECIFIC ROCKET TIP:
06/05 - "1) Do NOT assemble using model glue, re the carbon fiber tail strut. It will not stick. Use CA, or (better) a small dab of epoxy. 2) If you assemble with a very slight twist in tail boom orientation, it will circle nicely without adding weight. I discovered this by accident." (J.W.C. )

[Enter Flight Log]
Date Name Motor Ejection/
Altitude
Wind Notes
12-29-2005 David Allen Est SU B4-4 Very Late 5-10 mph winds - This is NOT the right motor for this rocket. Flew straight up for about 150' then during the delay it arced over and headed straight for the ground at a 45 degree angle with the booster still attached. Deployed streamer about 3' above ground. No damage.
11-10-2007 Moe Bertrand Est SU B6-2 Apogee - Perfect Calm Flight PictureEvent: Rainbow Valley
- Good boost but glider spiraled in...needs trimmed.
03-07-2005 Donald Besaw Est SU B6-4 Apogee - NC Down 5-10 mph winds - First flight, went off at a 45 degree angle after leaving launch rod. Came down fast on the stock 12 inch chute. No damage thanks to the tough plastic fin can.
03-07-2005 Donald Besaw Est SU C6-3 Very Late 0-5 mph winds - Second flight, boosted nice for a moment but then the tail assembly came off, sending the intire vehicle unstable. I think a C6 might be a bit much for this. No damage to anything amazingly.
03-15-2005 Donald Besaw Est SU B4-2 Apogee - NC Down 0-5 mph winds - Nice first flight, delay was longer than 2 seconds. Great glide from glider, made about 3-4 nice circular passes before landing. No damage.
04-06-2005 Donald Besaw Est SU B4-2 None - Unknown 0-5 mph winds II - First launch attempt for Eagle II, got stuck to the pad, never even budged. The wing and horizontal stabilizer were singed somewhat. Nothing major.
04-06-2005 Donald Besaw Est SU B4-2 Just Past (1-2sec) 0-5 mph winds II - Second launch attempt, got off the pad this time. Great glide from glider, at least 30-45 second glide time. I had a long walk to recover it though. No damage.
03-02-2010 John Bishop Est SU B6-2 Apogee - NC Up Calm - Great flight, soaring, circling glide. Excellent.
03-02-2010 John Bishop Est SU B6-2 Just Past (1-2sec) Calm - Nose cone shoulder failed on ejection. Cone separated but found.
03-02-2010 John Bishop Est SU B6-2 Apogee - NC Up Calm - Flew with damaged nose cone, no performance problems. Will repair.
03-15-2008 Jeff Boldig Est SU B6-2 Apogee - NC Up 0-5 mph winds Event: Battle Park
- This wasn't a very good flight. It wind-cocked and didn't fly straight up at all. The glider worked well.
03-15-2008 Jeff Boldig Est SU C6-3 Just Before 5-10 mph winds Event: Battle Park
- Great boost, fast and straight. Didn't circle very well and run with the wind. 1/2 mile flight, long walk.Slight damage to rear elevators, again.
09-21-2008 Jeff Boldig Est SU B6-2 Apogee - NC Down
(50 ft)
0-5 mph winds Event: Pole Green Park
- This was the third rear wing and it had a good air foil. Too much lift. Cause a loop under power. Glider booter ejected 10ft off the ground. The lift on rear wing made a steep dive and loop.
11-01-2008 Jeff Boldig Est SU B6-2 Apogee - NC Up
(100 ft)
0-5 mph winds Event: Battle Park
- Good flight. Tilted over some and glider was flat a apogee. Kicked off and flew great tight circles on the way down. No stalls and dives, just a constant steady tight circle on the way down. Great!
02-21-2009 Jeff Boldig Est SU C6-3 Apogee - NC Down 10+ mph winds RIPEvent: Battle Park
- Nice flight and deployment. Great flat glide. Too flat of glide. Went on wind a long ways and got caught in lone tree in middle of field. Status: Tree/Roof
09-03-2005 John Chapman Est SU B6-2 None - Glider Calm - Needs more nose weight. It becomes unstable at speed. Still, a great glide.
04-21-2007 Cee Gee Est SU B6-2 Very Early 0-5 mph winds - Ejection at speed. Glider tangled in streamer -- Red Baroned -- no damage. Going to avoid B6-2 for this rocket.
04-21-2007 Cee Gee Est SU B6-4 Apogee - Perfect 0-5 mph winds - Perfect smooth spiraling glide.
04-21-2007 Cee Gee Est SU B6-4 Apogee - Perfect 0-5 mph winds - At burnout, rocket made a 90 degree turn to left and coasted horizontally until perfect ejection/release. Smooth spiral glide.
04-21-2007 Cee Gee Est SU B6-4 Apogee - Perfect 0-5 mph winds - After burnout, coasted horizontally. Perfect ejection/release. Glide was alternating stall/dive, but smooth enough for good flight. Possible causes: wind had picked up a bit and horiz. stab. was drooping a bit from exhaust heat.
04-17-2010 Cee Gee Qst SU C6-3 Apogee - Perfect 5-10 mph winds - Several turns during non-vertical boost. Quest long-burn motor. Glider released at apogee. Good glide -- turned into wind several times. Some drooping of horiz. stab from engine blast. Repairable with heat gun.
02-28-2006 Daniel Kirk Est SU B6-4 Apogee - Perfect 5-10 mph winds RIPEvent: 500 ANT
- Glider stalled repeatedly and crashed, but was not damaged. NC missing - separated from shoulder. Status: Retired
06-24-2009 Jamie Martin Est SU B6-4 Just Past (1-2sec) 5-10 mph winds -
09-04-2005 James Reyome Est SU B6-4 Just Past (1-2sec) 0-5 mph winds - A little pre-flight trimming, and...WOW! Arced over to the east on launch, nosed over, ejected, and executed a beautiful wide spiral to a gentle landing. Glide lasted between 30-45 seconds and may have been longer. Can't wait to fly this one again!
10-22-2005 James Reyome Qst SU B6-4 Apogee - NC Down 10+ mph winds RIP - Quest motor sent the bird went higher than expected, glider went due south (wind?) instead of spiraling. It finally did turn north, just in time to land in the middle of Tennessee Highway 100. Crushed beyond recognition. Status: Not Repairable
10-22-2005 James Reyome Qst SU B6-4 Apogee - NC Down 10+ mph winds RIP - Quest motor sent the bird went higher than expected, glider went due south (wind?) instead of spiraling. It finally did turn north, just in time to land in the middle of Tennessee Highway 100. Crushed beyond recognition. Status: Not Repairable
10-19-2008 James Reyome Est SU B6-2 None - Unknown 5-10 mph winds RIP Eagle Two - My Eagles are jinxed. This one didn't even clear the pad and the exhaust ended up burning the glider's wing off. Well, maybe third time's a charm...pop pod is okay, but the glider has had it, well and truly. Status: Not Repairable
07-09-2005 Chan Stevens Est SU B6-2 Apogee - NC Up 5-10 mph winds - Balanced at red dots, lousy glide (nose heavy and very tight turn). Will remove some nose weight and try again.
09-11-2005 Chan Stevens Est SU C6-3 Just Past (1-2sec) 0-5 mph winds - Tipped horizontal 2/3 through boost, Red Baron'ed the glide
12-02-2006 Chan Stevens Est SU C6-3 Apogee - NC Down 0-5 mph winds -
07-01-2007 Chan Stevens Est SU B4-2 Apogee - Perfect 5-10 mph winds - First flight on new model, pod sep (cord failure), glider trimmed to spec and poor glide--nose heavy, very tight spiral.
09-22-2007 Chan Stevens Est SU B6-4 None - Glider 5-10 mph winds -
08-19-2007 Andy Turits Est SU B4-2 Apogee - Perfect Light winds - Wow! Yeah it's an EX2 but what a great flyer. Straight up boost to about 200 feet, perfect separation and without any special attention paid to trimming the glider cut lazy circles on the way down...Fun
08-19-2007 Andy Turits Est SU B4-2 Apogee - Perfect Light winds - Second flight at least as good as the first. Perfect separation at arc of apogee. No damage to any components, even a nice nose up belly landing on glider...and booster portion stayed within 150 feet of the pad...
08-26-2007 Andy Turits Est SU C6-3 None - Glider Light winds - glider disintegrated as it left the pad leaving power pod spinning about 10 ft off the ground but all the pieces were found and will rebuild using epoxy...and maybe stick to the B engines just to play it safe..
11-22-2007 Andy Turits Qst SU B6-2 Apogee - Perfect Light winds - A little boost and glide to entertain the crowd before Thanksgiving dinner! Nice!
07-09-2006 G Wallace Est SU C6-3 Just Past (1-2sec) 0-5 mph winds RIP - Rocked nosed to horizontal at about 500 feet and finally seperated as it came to nose down. Glider was completely out of control and crashed hard. Vertical stab was completely burned away. Status: Scavenged
06-23-2007 Ron Wirth Est SU C6-3 Very Early 0-5 mph winds - The foam glider tail ripped in half on takeoff. Very wild flight with no additional damage. Will try to replace tail with balsa. Might fly again.
   

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