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Rocket plane

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Old 11-05-2011, 07:24 AM
  #1
OliverJacob
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Default Rocket plane

Has anybody tried one of these:

http://www.randrmodelaircraft.com/Delta%20Star.htm

Which rocket motors do you use? Are they hard to control at launch?
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Old 11-05-2011, 11:29 AM
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Default RE: Rocket plane

I've never seen one of these but it looks pretty cool.
The manual http://www.randrmodelaircraft.com/me...al%20color.pdf has a chart on page 50 showing three motors they have tested in the model.
Something from http://www.hobbylinc.com/f_model_rocket_engines or http://www.hobbylinc.com/g_model_rocket_engines should work.
It uses a 5 foot launch rail to get it going in the right direction. The setup description says the launch should be pretty much 'hands free' if the model is trimmed and balanced well.
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Old 11-05-2011, 01:43 PM
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Default RE: Rocket plane

Reminds me of the LadyHawk. It was M.A.N. or RCM that put out plans for the LadyHawk. With the LadyHawk it carried two motors that could be fired at the same time for launch or the second for midair firing and gain altitude again.

The only problem with rocket planes are the high cost of the motors. It could cost $5-$10 per launch. But of course if your into rockets already you would think that might be acceptable.

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Old 11-05-2011, 02:02 PM
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Default RE: Rocket plane

Skeeter, the single use G motors are 17.50 each on the web site I found in a quick search. A reloadable motor (uses black powder) would probably be more economical over a period of time.
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Old 11-05-2011, 03:15 PM
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Default RE: Rocket plane

Yes, that was what I am wondering about. The motors seem very expensive and I don't know anything about the reusable type.

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Old 11-05-2011, 04:00 PM
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Default RE: Rocket plane

Years ago, the club I belonged to in Michigan had one sorta like this one that they flew for air shows. It was impressive for a couple times but then wore off. As I remember on launch you " DID NOT " touch the controls until it was well air born . As said above rocket motors are not cheap . ENJOY !!! RED
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Old 11-05-2011, 08:08 PM
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Default RE: Rocket plane

The LadyHawk used D and E estes motors. They can be bought for about $6-$9 each. I'm sure they are not as powerful as the composite ones but still usable.

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Old 11-06-2011, 05:53 PM
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Default RE: Rocket plane

The LadyHawk was published in the October 1993 issue of RCM. I'm going to read that article in the next couple of days. The span is about 23" according to the RCMPlans website (www.rcmplans.com).

I notice that TH only stocks up to the D motors. E motors are stocked at other website for about $20 per 3-pack plus shipping. The Estes site has them for about $55 per 3-pack (unless it's a misprint).

I thought I'd toss this in, just for fun. Just adding my $.02

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Old 11-08-2011, 11:31 PM
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Default RE: Rocket plane

Short burn and then a glider landing under no power.  I can see that getting old fast.
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Old 11-09-2011, 05:20 AM
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Default RE: Rocket plane

I think this is very interesting. Not an every day plane, but impressive for sure. I can see myself buying a $5 motor once in a while, but $17 is just too much. Thanks for all the input, I have not made up my mind yet...
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Old 11-09-2011, 05:53 PM
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Default RE: Rocket plane

I was into rockets as a kid.... just reconnected with an old friend and he is into high power rockets... pretty awesome. Anyway, while I was doing some research on youtube, I found a number of videos about "sugar" rocket engines. Search for that or KNO3. You can mix them up yourself and load up your own engines.
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Old 11-10-2011, 04:48 PM
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That might be a good idea. I don't know if this puts out enough thrust to launch an rc plane...i probably needs soem modifications and research, but very interesting
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Old 11-10-2011, 05:14 PM
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Default RE: Rocket plane

I once found a site that sold instructions on how to make rocket motors of any size you wanted. The power output was suppose to be the same as the estes motors at a fraction of the cost, what fraction i do not remember.

The thing i thought was cool about the LadyHawk was the fact it had two motors. One to get you up then glide back down and ignite the second to go back up again. Always that was kinda cool.

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Old 11-10-2011, 06:36 PM
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Default RE: Rocket plane

Skeeter, if you come across that article/link I'd be interested...

I also had that thought on the LadyHawk... How about a 'two-stager' where you light the first one to get you off the ground, then when the first one is spent, and you're still vertical, light off the second one. I hope that you have good eyesight. My son and I used to do model rockets and those 2-Stagers would really haul...

I'm sorely tempted to try that LadyHawk and some "E" Engines. TH doesn't sell "F" engines but maybe my LHS can get them.

Bob
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Old 11-10-2011, 07:20 PM
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Default RE: Rocket plane

Alright, I want one.
I found the plans, but would rather get a kit. Next hobby store is an hour away, and there is always something missing...
So I have found my winter project
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Old 11-13-2011, 03:30 PM
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Default RE: Rocket plane

Couldn't find the site i saw before but just Google "build your own rocket motors". You come up with more info than you could read in a life time.

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Old 11-13-2011, 05:03 PM
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Default RE: Rocket plane

Thanks, Skeeter.. I'll do that.

Bob
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