Information on Bob Parkinson's Royal Eagle

[gboulton]

(Cross Posted on RCU)

Does anyone have any experience with this aircraft?

If so, what can you ell me about it's approximate all up cost, the ease/difficulty of finding reccomended components, and its performance?

TIA

/gb

[eamrc]

You mean the Regal Eagle ? you could do it Electric with a 90mm fan like the Midifan if you lightened it up and used a brushless Lipoly set up.

[gboulton]

No, I mean the Royal Eagle..it's a slightly smaller kit with a 45.5" wingspan vs the Regal's 53" span.

It's designed from the outset to be powered by two Kyosho electric motors with fan units.

More info is at http://www.rcjets.com/ro-indx.htm

[bruff]

Not sure about setup, but Bob Parkinson kit's (glow version) all fly well. I would look into using HW 609 fans with Hacker B50-18S or a Mega 22 series motor.
Bob

[gboulton]

I'll likely go with the twin kyoshos Bob reccomends, at least at first.

[bruff]

Kysho fan throw blades when you that them over 250 Watts in power. I would think this plane would need more than 500 Watts total to fly jet like. Bob Parkinson does not have alot of EDF experience. Great with glow not sure on EDF.
Bob

[gboulton]

Good to know...thanks for the input, Bob.

[NCC-1701]

Gboulton,

Be careful ordering from Bob Parkinson. A few years ago, since the death of his wife, he has developed a bad reputation of not filling orders. Hopefully he has turned this around. Try and buy through a reputable dealer or at a show where you can deal face-to-face.

I checked out the link you provided. Bruff's advice on using Wemotec 609 fans is right on the money. Bob advertises a target weight of 5 lbs. The Kyosho fan on the AP29L is good for maybe 200 watts max. Two will deliver 400 watts. You need a minimum of 100 watts/pound for reasonable flight performance. Two 609's with Mega brushless motors will make it lfly like an F-15 should.

Rob

FYI:
http://www.rcuniverse.com/forum/m_64393/anchors_64393/mpage_1/key_parkinson/anchor/tm.htm#64393

[gboulton]

thanks for the info, NCC-1701.

As i get ready to order this beast, I may well come back to you looking for suggestions on sources for various components. :)

[edf_flyer]

Gboulton -

I am building a Royal Eagle.

No problem with the order (online) and delivery.

Kit includes the plans and moulded plastic parts.

Lots of balsa buying and cutting required although the design is quite elegant (box within a box).

The plans are basic and leave much to the imagination.

The instructions are at least in English but are not detailed and are incomplete.

A CD is included that "connects some of the dots" but the CD is for the Regal Eagle (so the part about installing a single OS 90 DF isn't helpful).

Big problem with finding the recommended Kyosho T-33 ducted fan; neither Kyosho nor Tower Hobbies (nor anyone else that I could find) is marketing the fans. I had one spare on hand and could not locate the second. Tower had them listed; but when I ordered one, I was notified that they were a DISCONTINUED item.

WeMoTec makes a replacement fan designated as "GNAT Pack" HW 609 but I could not find these either. I even ordered two from WeMoTec in Germany but never received a confirmation. An outfit in Texas called EAM now has these listed on their website http://www.eam.net/products.htm for $70 ea.

Ended up buying 2 WeMoTec HW 609-E Full Kit fans. These are 76mm dia and will produce up to 20 Newtons thrust (1 Newton = .22 LBF Thrust). These fans are cost twice as much as the Kyosho fans.

Using Mega brushless motors; and of course these require dedicated speed controllers.

Plan to use 2 five cell 2000 MaH Li-polys.

So this project will not be cheap ($850).

I started this project in March 05 and have the the airframe +wings built, the EDFs installed, and all servos installed. Need to finish wiring and install batteries, canopy and top fairing. I had ordered retracts from Spring Air but those folks have not delivered in 4 months so I am going to test fly without landing gear.

I have been sidetracked by two other projects, (one is a twin EDF F-22. It's a 45" wingspan foam plane; for $200 you get the plane, two fans, two brushless motors, and two speed controls) but I hope to have the Royal Eagle plane in test flight by Thanksgiving.

Will keep you posted.

edf_flyer

[NCC-1701]

edf_flyer,

Are you using the Mega 22/20/3's in your 609's? I'm building an EAM T-45 Goshawk with the that combo. I've test run the fan on 16 NiMh cells (plan on converting to 5S Lipos) and am getting about 630 watts. Your Eagle should scream on two of these!:cool:

[bruff]

Kyosho USA has the Kyosho fan in stock. They are not on the web site but if you email them. They have them.
Bob

[edf_flyer]

NCC-1701 -

I am using 16/15/2's. I had already bought them before I ran into the dead end on acquiring a Kyoshi DF. Those 22/20/3 will draw up to 70 AMPs. That would "puff" my Li-Polys which are rated at 2000 MaH rated at 15 C = Max 30 Amps. With two 5 cell packs in parallel at 30 AMPS per motor, total Watts should come out over 1100 (3.7 x 5 x 30 x 2). If that doesn't blow the fans first, it should make that Eagle scream.

bruff -

Thanks for the input on the Kyosho fan source. I may get another one for my T-33, just in case.

[RichTheBikeRider]

:) http://www.shredair.com/fan.html (http://www.shredair.com/fan.html)
spend money use these fans they preform, your Eagle will scream.
Rich

[NCC-1701]

NCC-1701 -

I am using 16/15/2's. I had already bought them before I ran into the dead end on acquiring a Kyoshi DF. Those 22/20/3 will draw up to 70 AMPs. That would "puff" my Li-Polys which are rated at 2000 MaH rated at 15 C = Max 30 Amps. With two 5 cell packs in parallel at 30 AMPS per motor, total Watts should come out over 1100 (3.7 x 5 x 30 x 2). If that doesn't blow the fans first, it should make that Eagle scream.

bruff -

Thanks for the input on the Kyosho fan source. I may get another one for my T-33, just in case.

edf_flyer

Sorry I've been away for a while and lost track of this thread.

I'm confused as to which set-up you're using in your Royal Eagle. The 16/15/2's work great in the Kyosho fan and the Wemotec MiiniFan 480. However, I was under the impression you were using Wemotec 609 fans, in which case, the 16/15/2's aren't going to work as they're just too small.

If amp draw is an issue, you can also go with a 22/20/4 set-up. On 6S, you'll be drawing about 26 amps per motor.


Rob

[monkamarm2000]

Yeah if your going anything but 480 fans those motors are not going to be up to the task. Even in the KY fan they are quetionable and beyond there limit. Loads in the 480 fan are in the 45 plus range, in a KY its up to and over 50 amps. In a 609 it would be through the roof. You want something like a Mega 22/20 series in, 3 or 2 turn, for lower cell counts, or 3 to 4 in hicher cell counts. For an example one of my 609's has a 22/20/3 on 6s, for 35 amps and 800 watts. 5s would be lighter though and still have plenty of power.


Barry